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.
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
USing Ticker Timers to describe motion 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
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 = (vu)/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:
equation
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.
eles0036
eles0036
In fact, forces always occur in pairs. Sometimes it is painfully obvious. For example, when you catch a fastmoving 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 hydroelectric 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 mgh2/ mgh2
REview of formulae
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 Energy and force energy is neither created nor destroyed but it is transformed/
e.g. solar energy is transformed into electrical energy is transformed into moving energy (a toy solar powered car or fan)
moving energy is called kinetic energy
kinetic energy = 1/2mv² Find the KE of a car mass 1000kg moving at 10m/s KE=1/2 x 1000 x 10 KE= 50000 joules or 50KJ
Gravitational potential energy (GPE) GPE= mass x acceleration due to gravity x height (m) E.g. find the GPE of a car of mass 1000 suspended 10m above the ground (g=9.8m/s/s) GPE = 1000 x 9.8 x 10
GPE= 98000 joules or 98KJ
Key points Newtons laws first law  object stays at rest until acted on by a force 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 third law  For every force there is an equal and opposite reaction collisions forces exert equal and opposite. examples are collisions and inertia
Graphs Dist vs time graph ie dist / time Distance / time = speed a special case is a displacement time graph i.e. velocity = displacement / time 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 Velocity is speed in a given direction = this means overall velocity has to take into account the velocity back toward the starting point speed vs time = tells us the acceleration
calculations ; Hint how to do a physics problem 1 read the question and underline the data 2. draw a picture of what is happening 3. list the data required and the formula you might use  and convert to correct units 4. plug the data into the formula
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 [from the question we want to find v we know u = 2 , a = 5 and t = 10]
v = 2+5 x 10
v= 52m/s
Part 2 what force is require to accelerate the giraffe to this velocity?
f= m x a
f= 500 x 5
f= 2500N What is the kinetic energy of the giraffe
8 Forces, energy and motion What do you remember about force, energy and motion? page304 8.1 Ready, set, go The speed equation, standard units and conversion, position or displacement and velocity. page 306
eLesson Science demonstrations Watch a video from the ABC’s Catalyst program about Newton’s First Law of Motion and dry ice on a balloon. eles1076 Complete questions 1to 5 page 315
8.4 Inertia and motion 8.5 Force and gravity including using EXCEL
Interactivity Test your ability to identify Newton’s laws in action by completing the Time Out: ‘Newton’s Laws’ interactivity. int0055 Weblink 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.
Progress Test 8.6 Homework
6.
8.7 Getting down to work Work done on an object by a force is equal to the change in energy of the object. page 320
Complete questions 1to 7 Weblink Use the Rollercoaster weblink in your eBookPLUS and your knowledge about forces and motion to build a rollercoaster that is both safe and fun.
Progress Test 8.7 Homework
7.
8.8 Systems: Energy ups and downs Energy changes in systems page 322
INQUIRY: INVESTIGATION 8.7 Follow the bouncing ball Key inquiry skill:
Video 1 Strength and flexibility of Oscar Pistorius Q. Describe how the prosthetic legs help him run. What forces are involved?
Video 2 Biomechanics of Usain Bolt 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?
Video 3 The impact of Jenny simpson Q. How does antigravity treadmill work? How is it related to the formula F = ma
Video 4 Maximising the long jump of Brian Clay Q. How does gravity affect Bryan's velocity? How does his take off angle help achieve a long jump.
Video 5 Sarah Robies and the mechanics of weightlifting Q. How does sarah achieve such explosive power in weightlifting.
Choose 3 videos that could be used to explain Newtons 3 laws. List the videos and write in bullet points why and how the video could be used to explain the each law.
Questions 710page 241
6.5 page 245246 Newton’s 3rd Law Action/reaction forces
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.
Materials (per group):
 Trundle wheel  Stopwatch  Pen  School map (see over the page)
Method:
Using the trundle wheel, measure a course around the school and record it on your map. Use the guidelines below:

Your course must be between 100 and 200 metres
 You must stay within school grounds
 Your course cannot include going into classrooms
 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.
Record the distance of your course in the table below. Remember to include the units.
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.
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.
Return to your classroom and complete the questions below.
Results:
Mode of Locomotion
Distance of Course
Displacement of Individual
Time Taken
Average Speed
Average Velocity
Discussion:
Describe the distance between distance and displacement.
Calculate the average speed for each mode of locomotion using the formula distance travelled/time taken.
Calculate the average velocity for each mode of locomotion using the formula displacement/time.
Describe the difference between instantaneous speed and average speed.
Describe the difference between speed and velocity.
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 Energy and force energy is neither created nor destroyed but it is transformed/
e.g. solar energy is transformed into electrical energy is transformed into moving energy (a toy solar powered car or fan)
moving energy is called kinetic energy
kinetic energy = 1/2mv² Find the KE of a car mass 1000kg moving at 10m/s KE=1/2 x 1000 x 10 KE= 50000 joules or 50KJ
Gravitational potential energy (GPE) GPE= mass x acceleration due to gravity x height (m) E.g. find the GPE of a car of mass 1000 suspended 10m above the ground (g=9.8m/s/s) GPE = 1000 x 9.8 x 10
GPE= 98000 joules or 98KJ
Key points Newtons laws first law  object stays at rest until acted on by a force 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 third law  For every force there is an equal and opposite reaction collisions forces exert equal and opposite. examples are collisions and inertia
Graphs Dist vs time graph ie dist / time Distance / time = speed a special case is a displacement time graph i.e. velocity = displacement / time 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 Velocity is speed in a given direction = this means overall velocity has to take into account the velocity back toward the starting point speed vs time = tells us the acceleration
calculations ; Hint how to do a physics problem 1 read the question and underline the data 2. draw a picture of what is happening 3. list the data required and the formula you might use 4. plug the data into the formula
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 [from the question we want to find v we know u = 2 , a = 5 and t = 10]
v = 2+5 x 10
v= 52m/s
Part 2 what force is require to accelerate the giraffe to this velocity?
f= m x a
f= 500 x 5
f= 2500N What is the kinetic energy of the giraffe
Yr 10 Forces and Motion 2015
pretest
Forces and Motion – key concepts Name: _
Speed and Velocity
Acceleration and deceleration
Scalar and Vector quantities
Average and instantaneous
Force
Friction
Air resistance
Lift thrust
Electrostatic
Magnetic
Inertia
Equilibrium/balance
Action/reaction
Gravity
Terminal velocity
Kinetic Energy
Potential (stored) energy:
Gravitational & Elastic
Read 8.1 page 262263 and answer Questions: 18
Interactive: Describing Movement, progress from the easy to the hard level
http://www.media.pearson.com.au/schools/cw/au_sch_rickard_sd4_1/dnd/sci4_5_1.html
Interactive: Understanding graphs answer the questions for distance and velocity by selecting the items on the top right of the screen.
http://www.media.pearson.com.au/schools/cw/au_sch_rickard_sd4_1/int/GraphMovement.html
Inquiry Investigation 8.1 Ticker Timer Tapes
Understanding and Inquiring Questions 1 and 2 page 266
Worksheets 8.1 and 8.2
http://gizmodo.com/abriefhistoryofphysics1147115801
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.
http://theuniverseandmore2.blogspot.com.au/
Inquiry Drag Strips Investigation 8.2
Worksheet 8.3 Acceleration
Prac: Experiencing Forces Booklet:
1.Types of Forces pages 3  4
2. Newton’s Ping Pong Balls pages 67
3. Circular Motion Page 8
Worksheets 8.4 and 8.5
Inquiry investigation 8.4 Force, mass and acceleration
Worksheet 8.6
Interactive: Resultant Force
http://www.media.pearson.com.au/schools/cw/au_sch_rickard_sd4_1/int/forces.html
Video: Collisions
interactive : Newton’s Laws
http://www.media.pearson.com.au/schools/cw/au_sch_rickard_sd4_1/dnd/sf4_0502.html
Read 8.9 page 281283 and answer questions 16, 79(in groups) page 283
Read 8.7 Page 276277 and 8.8 page 278280
Inquiry investigation 8.7 page 279
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/
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 remember1000m 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
USing Ticker Timers to describe motion
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
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/sthe 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 = (vu)/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 forcegeneral 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 LawsLearn about Newton's laws of motion and see them being applied in everyday life.
In fact, forces always occur in pairs. Sometimes it is painfully obvious. For example, when you catch a fastmoving 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 workWork 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.
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 mgh2/ mgh2
REview of formulae
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
Energy and force
energy is neither created nor destroyed but it is transformed/
e.g. solar energy is transformed into electrical energy is transformed into moving energy
(a toy solar powered car or fan)
moving energy is called kinetic energy
kinetic energy = 1/2mv²
Find the KE of a car mass 1000kg moving at 10m/s
KE=1/2 x 1000 x 10
KE= 50000 joules or 50KJ
Gravitational potential energy (GPE)
GPE= mass x acceleration due to gravity x height (m)
E.g. find the GPE of a car of mass 1000 suspended 10m above the ground (g=9.8m/s/s)
GPE = 1000 x 9.8 x 10
GPE= 98000 joules or 98KJ
Key points
Newtons laws
first law  object stays at rest until acted on by a force
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
third law  For every force there is an equal and opposite reaction collisions forces exert equal and opposite. examples are collisions and inertia
Graphs Dist vs time graph ie dist / time
Distance / time = speed
a special case is a displacement time graph i.e. velocity = displacement / time
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
Velocity is speed in a given direction = this means overall velocity has to take into account the velocity back toward the starting point
speed vs time = tells us the acceleration
calculations ;
Hint how to do a physics problem
1 read the question and underline the data
2. draw a picture of what is happening
3. list the data required and the formula you might use  and convert to correct units
4. plug the data into the formula
acceleration = (final velocity – initial velocity) /times
a= (vu)/t or v= u + at
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
[from the question we want to find v we know u = 2 , a = 5 and t = 10]
v = 2+5 x 10
v= 52m/s
Part 2 what force is require to accelerate the giraffe to this velocity?
f= m x a
f= 500 x 5
f= 2500N
What is the kinetic energy of the giraffe
KE=1/2 x m x v x v
KE= ½ x 500 x 52 x 52
KE= 676000J or 676KJ
_
7030task
What do you remember about force, energy and motion?
page304
8.1 Ready, set, go
The speed equation, standard units and conversion, position or displacement and velocity.
page 306
http://www.media.pearson.com.au/schools/cw/au_sch_rickard_sd4_1/dnd/sci4_5_1.html
Interactive: Understanding graphs
http://www.media.pearson.com.au/schools/cw/au_sch_rickard_sd4_1/int/GraphMovement.html
Readiness Test
Chapter 8
Progress Test 8.1
Homework
Describing instantaneous and average speed and velocity.
page 308
Ticker timer tapes
Key inquiry skills:
8.1 Speed and velocity
8.2 Ticker tapes
Interactive: Describing Movement
http://www.media.pearson.com.au/schools/cw/au_sch_rickard_sd4_1/dnd/sci4_5_1.html
Look at these graphs
http://www.pinterest.com/mrwallis/distancetimegraph/
Progress Test 8.2
Homework
Describing acceleration (and deceleration)
page 311
Drag strips
Key inquiry skills:
8.3 Acceleration
Progress Test 8.3
Homework
Using Newton’s First Law and inertia to describe motion.
Using EXCEL to tabulate data and plot graphs
page 313
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/energyskatepark
or
http://rollercoastergamesonline.com/rollercoastergames/digitallabscoastercreator
4. draw some graphs of how
velocity changes
acceleration changes
Gpe and KE cahnges
INQUIRY: INVESTIGATION 8.3
Forces on cars
Key inquiry skill:
7030Task
complete this task 
Science demonstrations
Watch a video from the ABC’s Catalyst program about Newton’s First Law of Motion and dry ice on a balloon. eles1076
Complete questions 1to 5 page 315
8.4 Inertia and motion
8.5 Force and gravity including using EXCEL
Access Code 4C4M
Access Links
Test Link http://www.classroomclipboard.com/490625/Test/56DFC7419CC24E07873D91BF61142DFB
Progress Test 8.4
Homework
Using Newton’s Second Law to describe net force on an object parallel to motion.
page 316
Force, mass and acceleration
Key inquiry skills:
8.6 Newton’s Second Law
Progress Test 8.5
Homework
Using Newton’s Third Law to identify action reaction pairs
page 318
Just a lot of hot air
Key inquiry skills:
INQUIRY: INVESTIGATION 8.6
Balloon rocket
Key inquiry skills:
Newton’s Laws
Learn about Newton’s laws of motion and see them being applied in everyday life eles0036
Complete both elessons and the web intereactive
Complete questions 1 to 6 page 319
8.7 Newton’s Third Law
http://www.pinterest.com/mrwallis/distancetimegraph/
Test your ability to identify Newton’s laws in action by completing the Time Out: ‘Newton’s Laws’ interactivity. int0055
Weblink
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.
Progress Test 8.6
Homework
Work done on an object by a force is equal to the change in energy of the object.
page 320
Weblink
Use the Rollercoaster weblink in your eBookPLUS and your knowledge about forces and motion to build a rollercoaster that is both safe and fun.
Progress Test 8.7
Homework
Energy changes in systems
page 322
Follow the bouncing ball
Key inquiry skill:
Optional:INQUIRY: INVESTIGATION 8.8
Swing high, swing low
Key inquiry skills:
Progress Test 8.8
Homework
page 325
Science as a human endeavour
Progress Test 8.9
Homework
page 327
Looking back
page 330
8.8 Forces, energy and
motion: Summary
Achievement test
Chapter 8
Forces acting on us
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
Do the online section of the test. click on the link
http://www.classroomclipboard.com/490625/Home/Test/34f5c4e538c7027703b0f361c77c62d8#/InitializeTest.xaml
Type your class as part of your last name eg ebony 10DDunkley
the test access code is X86S5
the written section will be done in class
Download this page and keep it in your note book.
Forces and Motion – key concepts Name: _
Speed and Velocity
Acceleration and deceleration
Scalar and Vector quantities
Average and instantaneous
Force
Friction
Air resistance
Lift thrust
Electrostatic
Magnetic
Inertia
Equilibrium/balance
Action/reaction
Gravity
Terminal velocity
Kinetic Energy
Potential (stored) energy:
Gravitational & Elastic
Formulae for speed/velocity
Conversion of units
Average and instantaneous
Understanding data from graphs
Activity: They’ve got the runs page 225
Prac: Chain reaction and Driving reaction times
The Reflex tester
Homework 6.1
http://www.media.pearson.com.au/schools/cw/au_sch_rickard_sd4_1/dnd/sci4_5_1.html
Interactive: Understanding graphs
http://www.media.pearson.com.au/schools/cw/au_sch_rickard_sd4_1/int/GraphMovement.html
Rate of change (of speed/velocity)
Speeding up/slowing down due to gravity
Activity: an accelerometer page 232
Extension  watch how they measure speed and acceleration on these graphs
http://physics.info/motiongraphs/
Experiencing Forces
Newton’s Law of inertia
Prac: Experiencing Forces Booklet:
1.Types of Forces pages 3  4
2. Newton’s Ping Pong Balls pages 67
3. Circular Motion Page 8
Prac: Crash test dummies page 238 and Inertial eggs page 239
Homework 6.3
Using Data sensors to measure motion a prac:
Assignment: Homework 6.5 as a research
crash test dummies
http://archive.org/details/crashdummies1
http://www.youtube.com/watch?v=d7iYZPp2zYY
can you measure the velocity of various parts of the body?
http://www.youtube.com/watch?v=OoJqCsHAak8&feature=related
Net Force
Drawing forces on the page – vectors
Prac: page 244
Newtons laws videos
Roller coasters exercise
http://www.nbclearn.com/portal/site/learn/scienceofthesummerolympics
Video 1 Strength and flexibility of Oscar Pistorius
Q. Describe how the prosthetic legs help him run. What forces are involved?
Video 2 Biomechanics of Usain Bolt
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?
Video 3 The impact of Jenny simpson
Q. How does antigravity treadmill work? How is it related to the formula F = ma
Video 4 Maximising the long jump of Brian Clay
Q. How does gravity affect Bryan's velocity? How does his take off angle help achieve a long jump.
Video 5 Sarah Robies and the mechanics of weightlifting
Q. How does sarah achieve such explosive power in weightlifting.
Now go to
http://www.nbclearn.com/portal/site/learn/scienceoftheolympicwintergames
Choose 3 videos that could be used to explain Newtons 3 laws.
List the videos and write in bullet points why and how the video could be used to explain the each law.
Action/reaction forces
Questions: 15 page 246
Video: Collisions
interactive : Newton’s Laws
http://www.media.pearson.com.au/schools/cw/au_sch_rickard_sd4_1/dnd/sf4_0502.html
Interactive: Resultant Force
http://www.media.pearson.com.au/schools/cw/au_sch_rickard_sd4_1/int/forces.html
Collision Game: http://www.students.unimainz.de/rathb000/Pinball/Game.html
Weight
Air resistance
Weightlessness
Prac: Observing weightlessness page 255
Homework 6.6
Moon Video click on “motion due to Gravity” link of http://www.vicphysics.org/index.php?id=263
Potential or stored energies:
Gravitational potential energy
Elastic potential energy
Prac: Extension of an elastic band and Efficiency of a roller coaster(hint: tape tubing to the cupboard/wall) page 260261
Homework 6.9
Test plus 1 A4 sheet of summary notes
Motion: Investigating Distance, Displacement, Speed and Velocity
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.
Materials (per group):
 Trundle wheel
 Stopwatch
 Pen
 School map (see over the page)
Method:

 You must stay within school grounds
 Your course cannot include going into classrooms
 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.
Results:
Discussion:
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
Energy and force
energy is neither created nor destroyed but it is transformed/
e.g. solar energy is transformed into electrical energy is transformed into moving energy
(a toy solar powered car or fan)
moving energy is called kinetic energy
kinetic energy = 1/2mv²
Find the KE of a car mass 1000kg moving at 10m/s
KE=1/2 x 1000 x 10
KE= 50000 joules or 50KJ
Gravitational potential energy (GPE)
GPE= mass x acceleration due to gravity x height (m)
E.g. find the GPE of a car of mass 1000 suspended 10m above the ground (g=9.8m/s/s)
GPE = 1000 x 9.8 x 10
GPE= 98000 joules or 98KJ
Key points
Newtons laws
first law  object stays at rest until acted on by a force
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
third law  For every force there is an equal and opposite reaction collisions forces exert equal and opposite. examples are collisions and inertia
Graphs Dist vs time graph ie dist / time
Distance / time = speed
a special case is a displacement time graph i.e. velocity = displacement / time
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
Velocity is speed in a given direction = this means overall velocity has to take into account the velocity back toward the starting point
speed vs time = tells us the acceleration
calculations ;
Hint how to do a physics problem
1 read the question and underline the data
2. draw a picture of what is happening
3. list the data required and the formula you might use
4. plug the data into the formula
acceleration = (final velocity – initial velocity) /times
a= (vu)/t or v= u + at
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
[from the question we want to find v we know u = 2 , a = 5 and t = 10]
v = 2+5 x 10
v= 52m/s
Part 2 what force is require to accelerate the giraffe to this velocity?
f= m x a
f= 500 x 5
f= 2500N
What is the kinetic energy of the giraffe
KE=1/2 x m x v x v
KE= ½ x 500 x 52 x 52
KE= 676000J or 676KJ