Yr+10+Movement

=Yr 10 Forces and Motion 2015 =

pretest


 * Access Code || X86S5 ||
 * Access Links ||
 * Test Link || @http://www.classroomclipboard.com/490625/Test/34F5C4E538C7027703B0F361C77C62D8 ||
 * Test Link || @http://www.classroomclipboard.com/490625/Test/34F5C4E538C7027703B0F361C77C62D8 ||

Speed and Velocity Acceleration and deceleration Scalar and Vector quantities Average and instantaneous || Standard International Units Force Friction Air resistance Lift thrust || Weight Electrostatic Magnetic Inertia || Mass Equilibrium/balance Action/reaction Gravity || Weightlessness Terminal velocity Kinetic Energy Potential (stored) energy: Gravitational & Elastic || Read 8.1 page 262-263 and answer Questions: 1-8
 * __ Forces and Motion – key concepts __**** Name: _ **
 * ** Key Concept ** ||||||  ** Vocabulary – Words To Learn **  ||   ||   ||
 * # 1. Relationships between force, mass and movement.
 * 1) 2. Energy changes are responsible for changes observed in motion and shape. || Distance and Displacement
 * || ** Outcomes: To be able to: **  ||  ** Suggested Activities **  ||  ** Extension & Variation **  ||
 * 1. || # 1. Use the formulae to calculate speed/velocity
 * 1) 2. Convert measurement units
 * 2) 3. Define average and instantaneous speed/velocity
 * 3) 4. Interpret data in graphical form || What do you know about forces? Read and complete the THINK activity and questions on page 261

Interactive: Describing Movement, progress from the easy to the hard level []

Interactive: Understanding graphs answer the questions for distance and velocity by selecting the items on the top right of the screen. []

Inquiry Investigation 8.1 Ticker Timer Tapes

Understanding and Inquiring Questions 1 and 2 page 266

Worksheets 8.1 and 8.2 || A brief and amusing history of physics – a 4minute clip []

Interactive: Kinematics game: This is a kinematics’ game in which students are given a position - time or a velocity time graph, depending on level, and they have to set the initial position and velocity, and acceleration if needed and also, if needed, the time and value of any velocity or accel'n change. The game then draws out the graph from their set values and then identifies the sections of that graph that match the original graph.

[] ||
 * 2. || # 1. Define acceleration as speeding up or slowing down using directed numbers
 * 1) 2. Calculate the acceleration as Rate of change (of speed/velocity)
 * 2) 3. Understand and define acceleration due to gravity as an object goes up and down || Read 8.3 page 267-268 Questions: 1 – 3

Inquiry Drag Strips Investigation 8.2

Worksheet 8.3 Acceleration ||  ||
 * 3. || # 1. Define Newton’s 1st Law
 * 1) 2. Define Net Force on an object as the addition of all the forces on the object
 * 2) 3. Consider the vector nature of force
 * 3) 4. Draw a force on an object as a vector || Read 8.4 page 269-71 and answer Questions: 1 – 5 page 315

Prac: //Experiencing Forces Booklet//: 1.Types of Forces pages 3 - 4 2. Newton’s Ping Pong Balls pages 6-7 3. Circular Motion Page 8

Worksheets 8.4 and 8.5 ||  ||
 * 4. || # 1. Define and use Newton’s 2nd Law for Net Force on an object parallel to the motion and understand the connection between net Force and mass || Read 8.5 page 272-273 and answer Questions: 1- 5 page 273
 * 4. || # 1. Define and use Newton’s 2nd Law for Net Force on an object parallel to the motion and understand the connection between net Force and mass || Read 8.5 page 272-273 and answer Questions: 1- 5 page 273

Inquiry investigation 8.4 Force, mass and acceleration

Worksheet 8.6

Interactive: Resultant Force [] ||  ||
 * 5. || # 1. Define Newton’s 3rd Law for action/reaction pairs of forces
 * 1) 2. Notate action/reaction forces in the form of Fa/b = - Fb/a || Read 8.6 page 274-275 and answer Questions: 1-6

Video: Collisions

interactive : Newton’s Laws [] || [] + worksheet ||
 * 6. || # 1. To describe the safety features of modern cars
 * 1) 2. Use Physics to describe their function || // The Reflex tester: [] //

Read 8.9 page 281-283 and answer questions 1-6, 7-9(in groups) page 283 ||  ||
 * 7. || # 1. To understand the connection between the work done by a force on an object and the objects change of motion. || Extension work if there is time for classes or individual students.

Read 8.7 Page 276-277 and 8.8 page 278-280 Inquiry investigation 8.7 page 279 ||  ||
 * 8. || Revision || Chapter Review Looking Back page 285

Test plus 1 A4 sheet, single sided, of summary notes

go to quizlet there are 3 revision games for you

https://quizlet.com/class/1688865/ || Interactive crossword: [] ||

Class Notes 2015 Speed vs Velocity,,, Distance vs Displacement 1. Go for a walk and record where you went how far you wnet and how long it took to finally Calculations and exploration 1. on a map of the school plot your travels 2.Record the number of steps Record the time take 3 Use speed = distance / time to calculate you speed in m / s

4 a)How far from S5 did you go b) How long did this take you?

=Converting to metres per second= things to remember 1000m in 1 km 60 seconds in 1 min 60 min in 1 hr therefore there are 3600 seconds in 1 hour

to convert km / hr to m/s

step 1 change the km to m (eg km x 1000) step 2 change hours to seconds (eg hr x 3600) step 3 divide the answer from step 1 by the answer form step 2

OR __//**as a short cut you can multiply m/s by 3.6 to get km/ hr**//__

__//** and divide km/hr by 3.6 to get m/s **//__

Make some ticker timer strips to show a constant speed - cut up a set of 3 strips of ticker paper that show 0.1s (ie 5 intervals ( 6 dots). Paste them in your book side by side. Label the vertical axis distance and the horizontal axis time. Make a ticker timer strips to show speeding up (acceleration)  Make some ticker timer strips to show slowing down
 * USing Ticker Timers to describe motion **

SOme calculations

average speed = distance / time with this equation we need to watch the units -in a car our speed will be measured as km/hr, an athlete running may be measured in metres per second ie m/s

Velocity is speed in a certain direction. generaly in physics we measure in velocity in m/s. So if we have a problem in where data is provided as km/hr we will usually convert this to m/s. The reason we do this is to provide consistency when we measure other aspects of motion ( and we are following the SI units for physics) To calculate velocity we measure the displacment (distance in a given direction) and divide by the seconds velocity = displacement / time

When you used the ticker timers you were measuring distance and dividing by time to get the average speed for each little strip you cut up. When you pasted each interval side by side you were making a distance tiime graph for that motion.

= distance time graphs = Can you describe what is happening between each of the letters?In particular what is happening from C to D.What about B to CFrom A to B is a curve. A curve on a distance time graph shows acceleration.

down load the complete pdf here it shows how to calculate acceleration

= =

You should know how to describe the following on a distance time graph 1. standing still 2. travelling at a constant speed 3. accelerating 4. decelerating

=Acceleration= WE describe acceleration as how quickly speed changes over a certain time. So if we start with a speed of 2m/s and increase that speed to 8m/s and it has taken 2 seconds to do this we say our acceleration is 3m/s/s the calculation for this is acceleration = change in velocity (v -u) / time where v is the final velocity and u is the initial velocity. Worked example a bike starts at rest ( ie initial velocity is 0 m/s) and increases its velocity for 3 seconds to a final velocity of 12 m/s. Find the accelaeration

a = (v-u)/t a = (12 - 0) / 3 ...............ie 12 / 3 a=4m/s/s

Positive acceleration -- is speeding up. eg when you press the accelerator you in crease your speed - this is acceleration. Negative acceleration = deceleration = slowing down eg when you put the brakes on in a car - you are decelerating.

=Newtons first law= a body will stay at rest ( or stay at the same veolcity (speed with direction)) until it is acted on by a force general formula to find force acting on a body is Force = mass x acceleration F = ma the answer is in N ( Newtons)

Weight and potential energy and formula One earth we have a weight force which can be calculated by

W=mass x acceleration due to gravity

W= mg acceleration due to gravity = 9.8m/s²

e.g. W= 70 x 9.8

W= 686 newtons = 686N If we were on the moon acceleration due to gravity is 1.6/s/s therefor our weight force would be

W=70 x 1.6

W= 112 Newton’s or 112N

=Newtons Second Law=

Describes how a Force is created by a mass being accelerated or F = ma In symbols, Newton's second law can be expressed as: The net force is the total force acting on the object. If the net force is measured in newtons (N) and the mass is measured in kilograms (kg), the acceleration can be determined in metres per second squared (m/s2).

If a large force is applied to a small mass it will accelerate very fast eg you pushing a ball If a large force is applied to a large mass it will accelerate slowly eg you pushing an elephant

In the last example you can imagine that elephant may want to push against you. the final direction and acceleration will depend on who has the largest push or force. The overall force is called the NET force. it always has direction.

If the net force is 0 we say the opposing forces are balanced - eg you sitting on a chair.

=Newtons Third Law= Newton's Third Law of Motion states that for every action there is an equal and opposite reaction. That is, when an object applies a force to a second object, the second object applies an equal and opposite force to the first object.

eLesson

 * Newton's Laws**

Learn about Newton's laws of motion and see them being applied in everyday life. eles-0036 In fact, forces always occur in pairs. Sometimes it is painfully obvious. For example, when you catch a fast-moving softball or cricket ball with your bare hands, your hands apply a force to the ball. The ball applies an equal and opposite force to your hands — causing the pain.

Draw draw a person on a chair how do the three laws work together

=Work= 8.7 Getting down to work Work done on an object by a force is equal to the change in energy of the object.

**__Work__** is described as the amount of force required to move something a certain distance. W = F x s where W = work and F = force and s = displacement or distance in a given direction.

Energy The unit of energy is the Joule or J Once something is moving we say it has **__Kinetic energy__** and can calculate this by KE = 1/2mv x v 1/2 = half, m = mass, v = velocity

All stored energy is called potential energy. Energy can be stored in several different ways. common calculation os of the amount of stored energy are

__**Potential Energy**__ (PE) = mgh where m = mass, g = acceleration due to gravity (usually 9.8 m/s/s) and h is height off the ground in metres. see below for worked examples here are some other forms of stored energy.


 * Elastic potential energy (also called strain energy) is present in objects when they are stretched or compressed. Stretched rubber bands and springs have elastic potential energy. So do compressed springs like the one shown below. When the hand is opened, the elastic potential energy in the compressed spring is converted into kinetic energy.
 * Gravitational potential energy is present in objects that are in a position from which they could fall as a result of the force of gravity. The water in a hydro-electric dam has gravitational potential energy. When the water is released, the force of gravity pulls down on it, doing work and converting the gravitational potential energy into kinetic energy.
 * Electrical potential energy is present in objects or groups of objects in which positively and negatively charged particles are separated. It is also present when like electric charges are brought close together. The most obvious evidence of electrical potential energy is in clouds during thunderstorms. When enough electrical potential energy builds up, electrons move as lightning between clouds or to the ground.
 * Chemical potential energy is present in all substances as a result of the electrical forces that hold atoms together. When chemical reactions take place, the stored energy can be converted to other forms of energy or it can be transferred to other atoms. Chemical potential energy is a form of electrical potential energy.
 * Nuclear energy is the potential energy stored within the nucleus of all atoms. In radioactive substances, nuclear energy is naturally converted to other forms of energy. In nuclear reactions, such as those in nuclear power stations, in nuclear weapons and on the sun and other stars, nuclei are split or combine together. As a result, some of the energy stored in the reacting nuclei is converted into other forms of energy.

Energy efficiency

Efficiency = (the useful output / energy input) *100

eg Aball is dropped from 100cm it bounces up 40 cm.

The efficiency of the ball is mgh 2 / mgh 2

REview of formulae

Weight and potential energy and formula <span style="font-family: 'Comic Sans MS',cursive;">One earth we have a weight force which can be calculated by

<span style="font-family: 'Comic Sans MS',cursive;">W=mass x acceleration due to gravity

<span style="font-family: 'Comic Sans MS',cursive;">W= mg acceleration due to gravity = 9.8m/s²

<span style="font-family: 'Comic Sans MS',cursive;">e.g. W= 70 x 9.8

<span style="font-family: 'Comic Sans MS',cursive;">W= 686 newtons = 686N <span style="font-family: 'Comic Sans MS',cursive;">If we were on the moon acceleration due to gravity is 1.6/s/s therefor our weight force would be

<span style="font-family: 'Comic Sans MS',cursive;">W=70 x 1.6

<span style="font-family: 'Comic Sans MS',cursive;">W= 112 Newton’s or 112N <span style="font-family: 'Comic Sans MS',cursive;">Energy and force <span style="font-family: 'Comic Sans MS',cursive;">energy is neither created nor destroyed but it is transformed/

<span style="font-family: 'Comic Sans MS',cursive;">e.g. solar energy is transformed into electrical energy is transformed into moving energy <span style="font-family: 'Comic Sans MS',cursive;">(a toy solar powered car or fan)

<span style="font-family: 'Comic Sans MS',cursive;">moving energy is called kinetic energy

<span style="font-family: 'Comic Sans MS',cursive;">kinetic energy = 1/2mv² <span style="font-family: 'Comic Sans MS',cursive;">Find the KE of a car mass 1000kg moving at 10m/s <span style="font-family: 'Comic Sans MS',cursive;">KE=1/2 x 1000 x 10 <span style="font-family: 'Comic Sans MS',cursive;">KE= 50000 joules or 50KJ

<span style="font-family: 'Comic Sans MS',cursive;">Gravitational potential energy (GPE) <span style="font-family: 'Comic Sans MS',cursive;">GPE= mass x acceleration due to gravity x height (m) <span style="font-family: 'Comic Sans MS',cursive;">E.g. find the GPE of a car of mass 1000 suspended 10m above the ground (g=9.8m/s/s) <span style="font-family: 'Comic Sans MS',cursive;">GPE = 1000 x 9.8 x 10

<span style="font-family: 'Comic Sans MS',cursive;">GPE= 98000 joules or 98KJ

<span style="font-family: 'Comic Sans MS',cursive;">Key points <span style="font-family: 'Comic Sans MS',cursive;">Newtons laws <span style="font-family: 'Comic Sans MS',cursive;">first law - object stays at rest until acted on by a force <span style="font-family: 'Comic Sans MS',cursive;">second law when a force acts on an object it will accelerate at a rate in proportion to the size of the force and the size of the mass it acts on F = ma <span style="font-family: 'Comic Sans MS',cursive;">third law - For every force there is an equal and opposite reaction collisions forces exert equal and opposite. examples are collisions and inertia

<span style="font-family: 'Comic Sans MS',cursive;">Graphs Dist vs time graph ie dist / time <span style="font-family: 'Comic Sans MS',cursive;">Distance / time = speed <span style="font-family: 'Comic Sans MS',cursive;">a special case is a displacement time graph i.e. velocity = displacement / time <span style="font-family: 'Comic Sans MS',cursive;">Big deal is displacment is distance with direction. This means displacement could be smaller than distance over the same journey eg if you went to the shops and got half way before you realised you forgot your purse and went back home and then went to the shops again. Displacement only looks at how far are you from your start ( home) While distance takes into account the return trip and back to the sshop <span style="font-family: 'Comic Sans MS',cursive;">Velocity is speed in a given direction = this means overall velocity has to take into account the velocity back toward the starting point <span style="font-family: 'Comic Sans MS',cursive;">speed vs time = tells us the acceleration

<span style="font-family: 'Comic Sans MS',cursive;">calculations ; <span style="font-family: 'Comic Sans MS',cursive;">Hint how to do a physics problem <span style="font-family: 'Comic Sans MS',cursive;">1 read the question and underline the data <span style="font-family: 'Comic Sans MS',cursive;">2. draw a picture of what is happening <span style="font-family: 'Comic Sans MS',cursive;">3. list the data required and the formula you might use - and convert to correct units <span style="font-family: 'Comic Sans MS',cursive;">4. plug the data into the formula

<span style="font-family: 'Comic Sans MS',cursive;">acceleration = (final velocity – initial velocity) /times

<span style="font-family: 'Comic Sans MS',cursive;">a= (v-u)/t or v= u + at

<span style="font-family: 'Comic Sans MS',cursive;">example; find the final velocity of a giraffe with a mass of 500kg that starts form 2m/s and accelerates at 5m/s/s for 10 seconds <span style="font-family: 'Comic Sans MS',cursive;">[from the question we want to find v we know u = 2, a = 5 and t = 10]

<span style="font-family: 'Comic Sans MS',cursive;">v = 2+5 x 10

<span style="font-family: 'Comic Sans MS',cursive;">v= 52m/s

<span style="font-family: 'Comic Sans MS',cursive;">Part 2 what force is require to accelerate the giraffe to this velocity?

<span style="font-family: 'Comic Sans MS',cursive;">f= m x a

<span style="font-family: 'Comic Sans MS',cursive;">f= 500 x 5

<span style="font-family: 'Comic Sans MS',cursive;">f= 2500N <span style="font-family: 'Comic Sans MS',cursive;">What is the kinetic energy of the giraffe

<span style="font-family: 'Comic Sans MS',cursive;">KE=1/2 x m x v x v

<span style="font-family: 'Comic Sans MS',cursive;">KE= ½ x 500 x 52 x 52

<span style="font-family: 'Comic Sans MS',cursive;">KE= 676000J or 676KJ _

7030task <span style="font-family: 'Comic Sans MS',cursive;">What do you remember about force, energy and motion? <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: right;">page304 <span style="font-family: 'Comic Sans MS',cursive;">8.1 Ready, set, go <span style="font-family: 'Comic Sans MS',cursive;">The speed equation, standard units and conversion, position or displacement and velocity. <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: right;">page 306 || <span style="font-family: 'Comic Sans MS',cursive;">Complete table on Page 305 and Questions 2 to 6 || <span style="font-family: 'Comic Sans MS',cursive;">Complete questions 1, 2, 3ESO, 5 to 8 page 307 || <span style="font-family: 'Comic Sans MS',cursive;">Interactive: Describing Movement <span style="font-family: 'Comic Sans MS',cursive;">[]
 * || <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: center;">Concept || <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: center;">SCIENCE INQUIRY SKILLS || <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: center;">Text and worksheets || <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: center;">Extension and Interactivities || [[image:http://mrwallisscience.wikispaces.com/site/embedthumbnail/placeholder?w=200&h=50 width="200" height="50" align="center"]] ||
 * <span style="font-family: 'Comic Sans MS',cursive;">1. || <span style="font-family: 'Comic Sans MS',cursive;">8 Forces, energy and motion

<span style="font-family: 'Comic Sans MS',cursive;">Interactive: Understanding graphs <span style="font-family: 'Comic Sans MS',cursive;">[] || <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">Readiness Test <span style="font-family: 'Comic Sans MS',cursive;">Chapter 8 <span style="font-family: 'Comic Sans MS',cursive;">Progress Test 8.1 <span style="font-family: 'Comic Sans MS',cursive;">Homework || <span style="font-family: 'Comic Sans MS',cursive;">Describing instantaneous and average speed and velocity. <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: right;">page 308 || <span style="font-family: 'Comic Sans MS',cursive;">Optional :INQUIRY: INVESTIGATION 8.1 <span style="font-family: 'Comic Sans MS',cursive;">Ticker timer tapes <span style="font-family: 'Comic Sans MS',cursive;">Key inquiry skills:
 * <span style="font-family: 'Comic Sans MS',cursive;">2.a || <span style="font-family: 'Comic Sans MS',cursive;">8.2 Measuring speed
 * <span style="font-family: 'Comic Sans MS',cursive;">planning and conducting
 * <span style="font-family: 'Comic Sans MS',cursive;">processing and analysing data and information || <span style="font-family: 'Comic Sans MS',cursive;">Complete questions 1 to 4 page 310

<span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">8.1 Speed and velocity || <span style="font-family: 'Comic Sans MS',cursive;">Extension: question 5

<span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">8.2 Ticker tapes <span style="font-family: 'Comic Sans MS',cursive;">Interactive: Describing Movement <span style="font-family: 'Comic Sans MS',cursive;">[]

<span style="font-family: 'Comic Sans MS',cursive;">Look at these graphs

http://www.pinterest.com/mrwallis/distance-time-graph/ || <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">Progress Test 8.2 <span style="font-family: 'Comic Sans MS',cursive;">Homework || <span style="font-family: 'Comic Sans MS',cursive;">Describing acceleration (and deceleration) <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: right;">page 311 || <span style="font-family: 'Comic Sans MS',cursive;">Optional: INQUIRY: INVESTIGATION 8.2 <span style="font-family: 'Comic Sans MS',cursive;">Drag strips <span style="font-family: 'Comic Sans MS',cursive;">Key inquiry skills: <span style="font-family: 'Comic Sans MS',cursive;">8.3 Acceleration || <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">Progress Test 8.3 <span style="font-family: 'Comic Sans MS',cursive;">Homework || <span style="font-family: 'Comic Sans MS',cursive;">Using Newton’s First Law and inertia to describe motion.
 * <span style="font-family: 'Comic Sans MS',cursive;">2.b || <span style="font-family: 'Comic Sans MS',cursive;">8.3 Speeding up
 * <span style="font-family: 'Comic Sans MS',cursive;">planning and conducting
 * <span style="font-family: 'Comic Sans MS',cursive;">processing and analysing data and information || <span style="font-family: 'Comic Sans MS',cursive;">Complete questions 1,2,3 || <span style="font-family: 'Comic Sans MS',cursive;">[[image:http://mrwallisscience.wikispaces.com/site/embedthumbnail/placeholder?w=200&h=50 width="200" height="50"]]
 * <span style="font-family: 'Comic Sans MS',cursive;">3. || <span style="font-family: 'Comic Sans MS',cursive;">8.4 Let’s go for a ride

<span style="font-family: 'Comic Sans MS',cursive;">Using EXCEL to tabulate data and plot graphs <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: right;">page 313 || Term 3 starter lesson review of some ideas

rollercoasters - what are they all about 1. amovie http://themeparks.lovetoknow.com/Videos_of_Roller_Coasters

2. some info http://themeparks.lovetoknow.com/Physics_of_Roller_Coasters

3. make your own --- http://pbskids.org/fetch/games/coaster/game.html

or

http://phet.colorado.edu/en/simulation/energy-skate-park

or

http://rollercoastergamesonline.com/roller-coaster-games/digital-labs-coaster-creator

4. draw some graphs of how velocity changes acceleration changes Gpe and KE cahnges

<span style="font-family: 'Comic Sans MS',cursive;">INQUIRY: INVESTIGATION 8.3 <span style="font-family: 'Comic Sans MS',cursive;">Forces on cars <span style="font-family: 'Comic Sans MS',cursive;">Key inquiry skill:
 * <span style="font-family: 'Comic Sans MS',cursive;">questioning and predicting

<span style="font-family: 'Comic Sans MS',cursive;">7030Task <span style="font-family: 'Comic Sans MS',cursive;">complete this task - || <span style="font-family: 'Comic Sans MS',cursive;">eLesson <span style="font-family: 'Comic Sans MS',cursive;">Science demonstrations <span style="font-family: 'Comic Sans MS',cursive;">Watch a video from the ABC’s Catalyst program about Newton’s First Law of Motion and dry ice on a balloon. eles-1076 <span style="font-family: 'Comic Sans MS',cursive;">Complete questions 1to 5 page 315 <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">8.4 Inertia and motion <span style="font-family: 'Comic Sans MS',cursive;">8.5 Force and gravity including using EXCEL

Access Code 4C4M Access Links Test Link http://www.classroomclipboard.com/490625/Test/56DFC7419CC24E07873D91BF61142DFB || <span style="font-family: 'Comic Sans MS',cursive;">Extension: questions 6 to 10 || <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">Progress Test 8.4 <span style="font-family: 'Comic Sans MS',cursive;">Homework || <span style="font-family: 'Comic Sans MS',cursive;">Using Newton’s Second Law to describe net force on an object parallel to motion. <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: right;">page 316 || <span style="font-family: 'Comic Sans MS',cursive;">INQUIRY: INVESTIGATION 8.4 <span style="font-family: 'Comic Sans MS',cursive;">Force, mass and acceleration <span style="font-family: 'Comic Sans MS',cursive;">Key inquiry skills: <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">8.6 Newton’s Second Law ||  || <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">Progress Test 8.5 <span style="font-family: 'Comic Sans MS',cursive;">Homework || <span style="font-family: 'Comic Sans MS',cursive;">Using Newton’s Third Law to identify action reaction pairs <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: right;">page 318 || <span style="font-family: 'Comic Sans MS',cursive;">INQUIRY: INVESTIGATION 8.5 <span style="font-family: 'Comic Sans MS',cursive;">Just a lot of hot air <span style="font-family: 'Comic Sans MS',cursive;">Key inquiry skills:
 * <span style="font-family: 'Comic Sans MS',cursive;">4. || <span style="font-family: 'Comic Sans MS',cursive;">8.5 Newton’s Second Law of Motion
 * <span style="font-family: 'Comic Sans MS',cursive;">planning and conducting
 * <span style="font-family: 'Comic Sans MS',cursive;">processing and analysing data and information
 * <span style="font-family: 'Comic Sans MS',cursive;">evaluating || <span style="font-family: 'Comic Sans MS',cursive;">Complete questions 1 to 5 page 317
 * <span style="font-family: 'Comic Sans MS',cursive;">5. || <span style="font-family: 'Comic Sans MS',cursive;">8.6 What’s your reaction?
 * <span style="font-family: 'Comic Sans MS',cursive;">questioning and predicting
 * <span style="font-family: 'Comic Sans MS',cursive;">processing and analysing data and information

<span style="font-family: 'Comic Sans MS',cursive;">INQUIRY: INVESTIGATION 8.6 <span style="font-family: 'Comic Sans MS',cursive;">Balloon rocket <span style="font-family: 'Comic Sans MS',cursive;">Key inquiry skills: <span style="font-family: 'Comic Sans MS',cursive;">Newton’s Laws <span style="font-family: 'Comic Sans MS',cursive;">Learn about Newton’s laws of motion and see them being applied in everyday life eles-0036
 * <span style="font-family: 'Comic Sans MS',cursive;">processing and analysing data and information
 * evaluating || <span style="font-family: 'Comic Sans MS',cursive;">eLesson

<span style="color: #cc0000; font-family: 'Arial Black',Gadget,sans-serif;">Complete both elessons and the web intereactive

<span style="font-family: 'Comic Sans MS',cursive;">Complete questions 1 to 6 page 319 <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">8.7 Newton’s Third Law http://www.pinterest.com/mrwallis/distance-time-graph/ || <span style="font-family: 'Comic Sans MS',cursive;">Interactivity <span style="font-family: 'Comic Sans MS',cursive;">Test your ability to identify Newton’s laws in action by completing the Time Out: ‘Newton’s Laws’ interactivity. int-0055 <span style="font-family: 'Comic Sans MS',cursive;">Weblink <span style="font-family: 'Comic Sans MS',cursive;">Use the Newton’s Laws weblink in your eBookPLUS to watch interactive animations describing Newton’s Laws of Motion. Then test yourself by taking the quiz. || <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">Progress Test 8.6 <span style="font-family: 'Comic Sans MS',cursive;">Homework || <span style="font-family: 'Comic Sans MS',cursive;">Work done on an object by a force is equal to the change in energy of the object. <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: right;">page 320 ||  || <span style="font-family: 'Comic Sans MS',cursive;">Complete questions 1to 7 <span style="font-family: 'Comic Sans MS',cursive;">Weblink <span style="font-family: 'Comic Sans MS',cursive;">Use the Rollercoaster weblink in your eBookPLUS and your knowledge about forces and motion to build a rollercoaster that is both safe and fun. ||  || <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">Progress Test 8.7 <span style="font-family: 'Comic Sans MS',cursive;">Homework || <span style="font-family: 'Comic Sans MS',cursive;">Energy changes in systems <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: right;">page 322 || <span style="font-family: 'Comic Sans MS',cursive;">INQUIRY: INVESTIGATION 8.7 <span style="font-family: 'Comic Sans MS',cursive;">Follow the bouncing ball <span style="font-family: 'Comic Sans MS',cursive;">Key inquiry skill:
 * <span style="font-family: 'Comic Sans MS',cursive;">6. || <span style="font-family: 'Comic Sans MS',cursive;">8.7 Getting down to work
 * <span style="font-family: 'Comic Sans MS',cursive;">7. || <span style="font-family: 'Comic Sans MS',cursive;">8.8 Systems: Energy ups and downs
 * <span style="font-family: 'Comic Sans MS',cursive;">processing and analysing data and information

<span style="font-family: 'Comic Sans MS',cursive;">Optional:INQUIRY: INVESTIGATION 8.8 <span style="font-family: 'Comic Sans MS',cursive;">Swing high, swing low <span style="font-family: 'Comic Sans MS',cursive;">Key inquiry skills: <span style="font-family: 'Comic Sans MS',cursive;">Progress Test 8.8 <span style="font-family: 'Comic Sans MS',cursive;">Homework || <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: right;">page 325 <span style="font-family: 'Comic Sans MS',cursive;">Science as a human endeavour || http://www.youtube.com/watch?v=yUpiV2I_IRI
 * <span style="font-family: 'Comic Sans MS',cursive;">questioning and predicting
 * <span style="font-family: 'Comic Sans MS',cursive;">communicating || <span style="font-family: 'Comic Sans MS',cursive;">Complete questions 1 to 3 page 324 ||  || <span style="font-family: 'Comic Sans MS',cursive;">[[image:http://mrwallisscience.wikispaces.com/site/embedthumbnail/placeholder?w=200&h=50 width="200" height="50"]]
 * <span style="font-family: 'Comic Sans MS',cursive;">8. || <span style="font-family: 'Comic Sans MS',cursive;">8.9 Making cars safe

|| <span style="font-family: 'Comic Sans MS',cursive;">Complete questions 1to 7 ||  || <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">Progress Test 8.9 <span style="font-family: 'Comic Sans MS',cursive;">Homework || <span style="display: block; font-family: 'Comic Sans MS',cursive; text-align: right;">page 327
 * || <span style="font-family: 'Comic Sans MS',cursive;">8.10 Cycle maps and storyboards

<span style="font-family: 'Comic Sans MS',cursive;">Looking back <span style="font-family: 'Comic Sans MS',cursive;"> page 330 ||  || <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">8.8 Forces, energy and <span style="font-family: 'Comic Sans MS',cursive;">motion: Summary ||  || <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">Achievement test <span style="font-family: 'Comic Sans MS',cursive;">Chapter 8 || NOTES 2013

Forces acting on us Non contact forces include - electrostatic forces, magnetic forces, gravity
 * Person || ........Forces acting on the person ||
 * Parachutist || Gravity, air resistance, wind ||
 * Bungee jumper || gravityElastic force ||
 * Skier || gravity frictionforce exerted by the earth ||
 * Cyclist || gravity, friction, pushing the pedals ||
 * Reader ||  ||
 * InLine Skater || friction, pushing their feet, air resistance, ||
 * Swimmer || bouyancy of the water, gravity, themselves pulling through the water ||

Average speed can be measured in many units eg km/hr or m/s or cm/minute In science we usually convert to metres per second = =

= =

<span style="font-family: 'Comic Sans MS',cursive;">Do the online section of the test. click on the link <span style="font-family: 'Comic Sans MS',cursive;">http://www.classroomclipboard.com/490625/Home/Test/34f5c4e538c7027703b0f361c77c62d8#/InitializeTest.xaml <span style="font-family: 'Comic Sans MS',cursive;">Type your class as part of your last name eg ebony 10DDunkley <span style="font-family: 'Comic Sans MS',cursive;">the test access code is X86S5 <span style="font-family: 'Comic Sans MS',cursive;">the written section will be done in class

<span style="font-family: 'Comic Sans MS',cursive;">Download this page and keep it in your note book. <span style="font-family: 'Comic Sans MS',cursive;">Forces and Motion – key concepts Name: _ <span style="font-family: 'Comic Sans MS',cursive;">Speed and Velocity <span style="font-family: 'Comic Sans MS',cursive;">Acceleration and deceleration <span style="font-family: 'Comic Sans MS',cursive;">Scalar and Vector quantities <span style="font-family: 'Comic Sans MS',cursive;">Average and instantaneous || <span style="font-family: 'Comic Sans MS',cursive;">Standard International Units <span style="font-family: 'Comic Sans MS',cursive;">Force <span style="font-family: 'Comic Sans MS',cursive;">Friction <span style="font-family: 'Comic Sans MS',cursive;">Air resistance <span style="font-family: 'Comic Sans MS',cursive;">Lift thrust || <span style="font-family: 'Comic Sans MS',cursive;">Weight <span style="font-family: 'Comic Sans MS',cursive;">Electrostatic <span style="font-family: 'Comic Sans MS',cursive;">Magnetic <span style="font-family: 'Comic Sans MS',cursive;">Inertia || <span style="font-family: 'Comic Sans MS',cursive;">Mass <span style="font-family: 'Comic Sans MS',cursive;">Equilibrium/balance <span style="font-family: 'Comic Sans MS',cursive;">Action/reaction <span style="font-family: 'Comic Sans MS',cursive;">Gravity || <span style="font-family: 'Comic Sans MS',cursive;">Weightlessness <span style="font-family: 'Comic Sans MS',cursive;">Terminal velocity <span style="font-family: 'Comic Sans MS',cursive;">Kinetic Energy <span style="font-family: 'Comic Sans MS',cursive;">Potential (stored) energy: <span style="font-family: 'Comic Sans MS',cursive;">Gravitational & Elastic ||
 * <span style="font-family: 'Comic Sans MS',cursive;">Key Concept |||||| <span style="font-family: 'Comic Sans MS',cursive;">Vocabulary ||  ||   ||
 * # <span style="font-family: 'Comic Sans MS',cursive;">Relationships between force, mass and movement.
 * 1) <span style="font-family: 'Comic Sans MS',cursive;">Energy changes are responsible for changes observed in motion and shape. || <span style="font-family: 'Comic Sans MS',cursive;">Distance and Displacement

<span style="font-family: 'Comic Sans MS',cursive;">Formulae for speed/velocity <span style="font-family: 'Comic Sans MS',cursive;">Conversion of units <span style="font-family: 'Comic Sans MS',cursive;">Average and instantaneous <span style="font-family: 'Comic Sans MS',cursive;">Understanding data from graphs || <span style="font-family: 'Comic Sans MS',cursive;">Read 6.1 and answer Questions: 1-4 and 8-15 page 221
 * <span style="font-family: 'Comic Sans MS',cursive;">Priority || <span style="font-family: 'Comic Sans MS',cursive;">Suggested Activities || <span style="font-family: 'Comic Sans MS',cursive;">Extension & Variation ||
 * <span style="font-family: 'Comic Sans MS',cursive;">6.1 page 217 -9

<span style="font-family: 'Comic Sans MS',cursive;">Activity: They’ve got the runs page 225 <span style="font-family: 'Comic Sans MS',cursive;">Prac: Chain reaction and Driving reaction times <span style="font-family: 'Comic Sans MS',cursive;">The Reflex tester <span style="font-family: 'Comic Sans MS',cursive;">Homework 6.1 || <span style="font-family: 'Comic Sans MS',cursive;">Interactive: Describing Movement <span style="font-family: 'Comic Sans MS',cursive;">[]

<span style="font-family: 'Comic Sans MS',cursive;">Interactive: Understanding graphs <span style="font-family: 'Comic Sans MS',cursive;">[] || <span style="font-family: 'Comic Sans MS',cursive;">Rate of change (of speed/velocity) <span style="font-family: 'Comic Sans MS',cursive;">Speeding up/slowing down due to gravity || <span style="font-family: 'Comic Sans MS',cursive;">Read 6.2 Questions: 1 – 6 page 230
 * <span style="font-family: 'Comic Sans MS',cursive;">6.2 page 229-230 Acceleration – speeding up or slowing down

<span style="font-family: 'Comic Sans MS',cursive;">Activity: an accelerometer page 232 || <span style="font-family: 'Comic Sans MS',cursive;">Questions 7 – 8 and 11 – 12 page 231

<span style="font-family: 'Comic Sans MS',cursive;">Extension - watch how they measure speed and acceleration on these graphs

<span style="font-family: 'Comic Sans MS',cursive;">http://physics.info/motion-graphs/ || <span style="font-family: 'Comic Sans MS',cursive;">Experiencing Forces <span style="font-family: 'Comic Sans MS',cursive;">Newton’s Law of inertia || <span style="font-family: 'Comic Sans MS',cursive;">Read 6.3 and answer Questions: 1 – 8 page 236 <span style="font-family: 'Comic Sans MS',cursive;">Prac: Experiencing Forces Booklet: <span style="font-family: 'Comic Sans MS',cursive;"> 1.Types of Forces pages 3 - 4 <span style="font-family: 'Comic Sans MS',cursive;">2. Newton’s Ping Pong Balls pages 6-7 <span style="font-family: 'Comic Sans MS',cursive;">3. Circular Motion Page 8
 * <span style="font-family: 'Comic Sans MS',cursive;">6.3 page 234 - 236 Forces

<span style="font-family: 'Comic Sans MS',cursive;">Prac: Crash test dummies page 238 and Inertial eggs page 239 <span style="font-family: 'Comic Sans MS',cursive;">Homework 6.3

<span style="font-family: 'Comic Sans MS',cursive;">Using Data sensors to measure motion a prac: <span style="font-family: 'Comic Sans MS',cursive;"> || <span style="font-family: 'Comic Sans MS',cursive;">Questions 9 – 19 page 237

<span style="font-family: 'Comic Sans MS',cursive;">Assignment: Homework 6.5 as a research <span style="font-family: 'Comic Sans MS',cursive;">crash test dummies

<span style="font-family: 'Comic Sans MS',cursive;">http://archive.org/details/crashdummies1 <span style="font-family: 'Comic Sans MS',cursive;">http://www.youtube.com/watch?v=d7iYZPp2zYY <span style="font-family: 'Comic Sans MS',cursive;">can you measure the velocity of various parts of the body?

<span style="font-family: 'Comic Sans MS',cursive;">http://www.youtube.com/watch?v=OoJqCsHAak8&feature=related || <span style="font-family: 'Comic Sans MS',cursive;">Net Force <span style="font-family: 'Comic Sans MS',cursive;">Drawing forces on the page – vectors || <span style="font-family: 'Comic Sans MS',cursive;">Questions: 1- 6 page 241 <span style="font-family: 'Comic Sans MS',cursive;">Prac: page 244
 * <span style="font-family: 'Comic Sans MS',cursive;">6.4 page 240 -241Newton’s 2nd Law, the relationship between force and mass.

<span style="font-family: 'Comic Sans MS',cursive;">Newtons laws videos

<span style="font-family: 'Comic Sans MS',cursive;">Roller coasters exercise

<span style="font-family: 'Comic Sans MS',cursive;">http://www.nbclearn.com/portal/site/learn/science-of-the-summer-olympics

<span style="font-family: 'Comic Sans MS',cursive;">Video 1 Strength and flexibility of Oscar Pistorius <span style="font-family: 'Comic Sans MS',cursive;">Q. Describe how the prosthetic legs help him run. What forces are involved?

<span style="font-family: 'Comic Sans MS',cursive;">Video 2 Biomechanics of Usain Bolt <span style="font-family: 'Comic Sans MS',cursive;">Q. In order to achieve top acceleration and maintain speed Bolt needs to use more force to move more mass ( he is very tall for a sprinter) how does he do this?

<span style="font-family: 'Comic Sans MS',cursive;">Video 3 The impact of Jenny simpson <span style="font-family: 'Comic Sans MS',cursive;">Q. How does antigravity treadmill work? How is it related to the formula F = ma

<span style="font-family: 'Comic Sans MS',cursive;">Video 4 Maximising the long jump of Brian Clay <span style="font-family: 'Comic Sans MS',cursive;">Q. How does gravity affect Bryan's velocity? How does his take off angle help achieve a long jump.

<span style="font-family: 'Comic Sans MS',cursive;">Video 5 Sarah Robies and the mechanics of weightlifting <span style="font-family: 'Comic Sans MS',cursive;">Q. How does sarah achieve such explosive power in weightlifting.

<span style="font-family: 'Comic Sans MS',cursive;">Now go to <span style="font-family: 'Comic Sans MS',cursive;">http://www.nbclearn.com/portal/site/learn/science-of-the-olympic-winter-games

<span style="font-family: 'Comic Sans MS',cursive;">Choose 3 videos that could be used to explain Newtons 3 laws. <span style="font-family: 'Comic Sans MS',cursive;">List the videos and write in bullet points why and how the video could be used to explain the each law. || <span style="font-family: 'Comic Sans MS',cursive;">Questions 7-10page 241 || <span style="font-family: 'Comic Sans MS',cursive;">Action/reaction forces || <span style="font-family: 'Comic Sans MS',cursive;">Prac: Balloon Rockets 1 and 2 page 248 <span style="font-family: 'Comic Sans MS',cursive;">Questions: 1-5 page 246 <span style="font-family: 'Comic Sans MS',cursive;">Video: Collisions || <span style="font-family: 'Comic Sans MS',cursive;">Questions 6-11 page 247 <span style="font-family: 'Comic Sans MS',cursive;">interactive : Newton’s Laws <span style="font-family: 'Comic Sans MS',cursive;">[]
 * <span style="font-family: 'Comic Sans MS',cursive;">6.5 page 245-246 Newton’s 3rd Law

<span style="font-family: 'Comic Sans MS',cursive;">Interactive: Resultant Force <span style="font-family: 'Comic Sans MS',cursive;">[]

<span style="font-family: 'Comic Sans MS',cursive;">Collision Game: [] || <span style="font-family: 'Comic Sans MS',cursive;">Weight <span style="font-family: 'Comic Sans MS',cursive;">Air resistance <span style="font-family: 'Comic Sans MS',cursive;">Weightlessness || <span style="font-family: 'Comic Sans MS',cursive;">Questions: 1-12 page 251 <span style="font-family: 'Comic Sans MS',cursive;">Prac: Observing weightlessness page 255
 * <span style="font-family: 'Comic Sans MS',cursive;">6.6 page 249-251 Gravity

<span style="font-family: 'Comic Sans MS',cursive;">Homework 6.6 || <span style="font-family: 'Comic Sans MS',cursive;">Question 13 -18 page 251 <span style="font-family: 'Comic Sans MS',cursive;">Moon Video click on “motion due to Gravity” link of [] || <span style="font-family: 'Comic Sans MS',cursive;">Potential or stored energies: <span style="font-family: 'Comic Sans MS',cursive;">Gravitational potential energy <span style="font-family: 'Comic Sans MS',cursive;">Elastic potential energy || <span style="font-family: 'Comic Sans MS',cursive;">Questions: 1-7page 258 <span style="font-family: 'Comic Sans MS',cursive;">Prac: Extension of an elastic band and Efficiency of a roller coaster(hint: tape tubing to the cupboard/wall) page 260-261 ||  || <span style="font-family: 'Comic Sans MS',cursive;">Homework 6.9 || <span style="font-family: 'Comic Sans MS',cursive;">Interactive crossword: []
 * <span style="font-family: 'Comic Sans MS',cursive;">6.7page 256-258 energy, Work, Kinetic energy
 * <span style="font-family: 'Comic Sans MS',cursive;">Revision || <span style="font-family: 'Comic Sans MS',cursive;">Chapter Review page 262

<span style="font-family: 'Comic Sans MS',cursive;">Test plus 1 A4 sheet of summary notes ||

<span style="font-family: 'Comic Sans MS',cursive;">Motion: Investigating Distance, Displacement, Speed and Velocity <span style="font-family: 'Comic Sans MS',cursive;"> <span style="font-family: 'Comic Sans MS',cursive;">Your task, in a group of 3 or 4, is to map out a course around the school. Individuals in your group will be timed whilst travelling this course. From this activity, you will be required to work out values of distance, displacement, speed and velocity.

<span style="font-family: 'Comic Sans MS',cursive;">Materials (per group):

<span style="font-family: 'Comic Sans MS',cursive;">- Trundle wheel <span style="font-family: 'Comic Sans MS',cursive;">- Stopwatch <span style="font-family: 'Comic Sans MS',cursive;">- Pen <span style="font-family: 'Comic Sans MS',cursive;">- School map (see over the page)

<span style="font-family: 'Comic Sans MS',cursive;">Method:
 * 1) <span style="font-family: 'Comic Sans MS',cursive;">Using the trundle wheel, measure a course around the school and record it on your map. Use the guidelines below:

<span style="font-family: 'Comic Sans MS',cursive;">- <span style="font-family: 'Comic Sans MS',cursive;">Your course must be between 100 and 200 metres

<span style="font-family: 'Comic Sans MS',cursive;">- You must stay within school grounds

<span style="font-family: 'Comic Sans MS',cursive;">- Your course cannot include going into classrooms

<span style="font-family: 'Comic Sans MS',cursive;">- In order to be able to calculate displacement you must be able to measure, in a straight line, from the starting position to the final position of your course, as shown on the right. If this line is through a building or other object, you will not be able to measure displacement.


 * 1) <span style="font-family: 'Comic Sans MS',cursive;">Record the distance of your course in the table below. Remember to include the units.


 * 1) <span style="font-family: 'Comic Sans MS',cursive;">Measure from the end point of your course to the starting point of your course in a straight line in order to find the displacement. Record this in the table below.


 * 1) <span style="font-family: 'Comic Sans MS',cursive;">Choose one person from the group to travel your course. They must do so 2 times, each using a different form of locomotion. Choose 2 of the following examples: walking, jogging, skipping, lunges, hopping. Each time the person travels the course, you should record their time with the stopwatch and write it in the table below.


 * 1) <span style="font-family: 'Comic Sans MS',cursive;">Return to your classroom and complete the questions below.

<span style="font-family: 'Comic Sans MS',cursive;">Results:


 * <span style="font-family: 'Comic Sans MS',cursive;">Mode of Locomotion || <span style="font-family: 'Comic Sans MS',cursive;">Distance of Course || <span style="font-family: 'Comic Sans MS',cursive;">Displacement of Individual || <span style="font-family: 'Comic Sans MS',cursive;">Time Taken || <span style="font-family: 'Comic Sans MS',cursive;">Average Speed || <span style="font-family: 'Comic Sans MS',cursive;">Average Velocity ||

<span style="font-family: 'Comic Sans MS',cursive;">Discussion:
 * 1) <span style="font-family: 'Comic Sans MS',cursive;">Describe the distance between distance and displacement.
 * 2) <span style="font-family: 'Comic Sans MS',cursive;">Calculate the average speed for each mode of locomotion using the formula distance travelled/time taken.
 * 3) <span style="font-family: 'Comic Sans MS',cursive;">Calculate the average velocity for each mode of locomotion using the formula displacement/time.
 * 4) <span style="font-family: 'Comic Sans MS',cursive;">Describe the difference between instantaneous speed and average speed.
 * 5) <span style="font-family: 'Comic Sans MS',cursive;">Describe the difference between speed and velocity.

<span style="font-family: 'Comic Sans MS',cursive;">Map of the school <span style="font-family: 'Comic Sans MS',cursive;">

<span style="font-family: 'Comic Sans MS',cursive;">Weight and potential energy and formula <span style="font-family: 'Comic Sans MS',cursive;">One earth we have a weight force which can be calculated by

<span style="font-family: 'Comic Sans MS',cursive;"> W=mass x acceleration due to gravity

<span style="font-family: 'Comic Sans MS',cursive;"> W= mg acceleration due to gravity = 9.8m/s²

<span style="font-family: 'Comic Sans MS',cursive;"> e.g. W= 70 x 9.8

<span style="font-family: 'Comic Sans MS',cursive;"> W= 686 newtons = 686N <span style="font-family: 'Comic Sans MS',cursive;">If we were on the moon acceleration due to gravity is 1.6/s/s therefor our weight force would be

<span style="font-family: 'Comic Sans MS',cursive;"> W=70 x 1.6

<span style="font-family: 'Comic Sans MS',cursive;"> W= 112 Newton’s or 112N <span style="font-family: 'Comic Sans MS',cursive;">Energy and force <span style="font-family: 'Comic Sans MS',cursive;">energy is neither created nor destroyed but it is transformed/

<span style="font-family: 'Comic Sans MS',cursive;"> e.g. solar energy is transformed into electrical energy is transformed into moving energy <span style="font-family: 'Comic Sans MS',cursive;">(a toy solar powered car or fan)

<span style="font-family: 'Comic Sans MS',cursive;"> moving energy is called kinetic energy

<span style="font-family: 'Comic Sans MS',cursive;"> kinetic energy = 1/2mv² <span style="font-family: 'Comic Sans MS',cursive;">Find the KE of a car mass 1000kg moving at 10m/s <span style="font-family: 'Comic Sans MS',cursive;">KE=1/2 x 1000 x 10 <span style="font-family: 'Comic Sans MS',cursive;">KE= 50000 joules or 50KJ

<span style="font-family: 'Comic Sans MS',cursive;">Gravitational potential energy (GPE) <span style="font-family: 'Comic Sans MS',cursive;">GPE= mass x acceleration due to gravity x height (m) <span style="font-family: 'Comic Sans MS',cursive;">E.g. find the GPE of a car of mass 1000 suspended 10m above the ground (g=9.8m/s/s) <span style="font-family: 'Comic Sans MS',cursive;">GPE = 1000 x 9.8 x 10

<span style="font-family: 'Comic Sans MS',cursive;"> GPE= 98000 joules or 98KJ

<span style="font-family: 'Comic Sans MS',cursive;">Key points <span style="font-family: 'Comic Sans MS',cursive;">Newtons laws <span style="font-family: 'Comic Sans MS',cursive;">first law - object stays at rest until acted on by a force <span style="font-family: 'Comic Sans MS',cursive;">second law when a force acts on an object it will accelerate at a rate in proportion to the size of the force and the size of the mass it acts on F = ma <span style="font-family: 'Comic Sans MS',cursive;">third law - For every force there is an equal and opposite reaction collisions forces exert equal and opposite. examples are collisions and inertia

<span style="font-family: 'Comic Sans MS',cursive;">Graphs Dist vs time graph ie dist / time <span style="font-family: 'Comic Sans MS',cursive;">Distance / time = speed <span style="font-family: 'Comic Sans MS',cursive;">a special case is a displacement time graph i.e. velocity = displacement / time <span style="font-family: 'Comic Sans MS',cursive;">Big deal is displacment is distance with direction. This means displacement could be smaller than distance over the same journey eg if you went to the shops and got half way before you realised you forgot your purse and went back home and then went to the shops again. Displacement only looks at how far are you from your start ( home) While distance takes into account the return trip and back to the sshop <span style="font-family: 'Comic Sans MS',cursive;">Velocity is speed in a given direction = this means overall velocity has to take into account the velocity back toward the starting point <span style="font-family: 'Comic Sans MS',cursive;"> speed vs time = tells us the acceleration

<span style="font-family: 'Comic Sans MS',cursive;"> calculations ; <span style="font-family: 'Comic Sans MS',cursive;">Hint how to do a physics problem <span style="font-family: 'Comic Sans MS',cursive;">1 read the question and underline the data <span style="font-family: 'Comic Sans MS',cursive;">2. draw a picture of what is happening <span style="font-family: 'Comic Sans MS',cursive;">3. list the data required and the formula you might use <span style="font-family: 'Comic Sans MS',cursive;">4. plug the data into the formula

<span style="font-family: 'Comic Sans MS',cursive;"> acceleration = (final velocity – initial velocity) /times

<span style="font-family: 'Comic Sans MS',cursive;"> a= (v-u)/t or v= u + at

<span style="font-family: 'Comic Sans MS',cursive;"> example; find the final velocity of a giraffe with a mass of 500kg that starts form 2m/s and accelerates at 5m/s/s for 10 seconds <span style="font-family: 'Comic Sans MS',cursive;">[from the question we want to find v we know u = 2, a = 5 and t = 10]

<span style="font-family: 'Comic Sans MS',cursive;"> v = 2+5 x 10

<span style="font-family: 'Comic Sans MS',cursive;"> v= 52m/s

<span style="font-family: 'Comic Sans MS',cursive;">Part 2 what force is require to accelerate the giraffe to this velocity?

<span style="font-family: 'Comic Sans MS',cursive;"> f= m x a

<span style="font-family: 'Comic Sans MS',cursive;"> f= 500 x 5

<span style="font-family: 'Comic Sans MS',cursive;"> f= 2500N <span style="font-family: 'Comic Sans MS',cursive;">What is the kinetic energy of the giraffe

<span style="font-family: 'Comic Sans MS',cursive;"> KE=1/2 x m x v x v

<span style="font-family: 'Comic Sans MS',cursive;"> KE= ½ x 500 x 52 x 52

<span style="font-family: 'Comic Sans MS',cursive;"> KE= 676000J or 676KJ