Transcript define and use speed

Learning Objectives
Define and use speed
Describe the difference between average and instantaneous speed
Recall and use displacement
Draw and interpret distance-time graphs
Recall and use velocity
Draw and interpret velocity-time graphs
Use examples of applications of recording motion
Recall and understand how a force arises
Use arrows to model forces
Understand Newton’s third law
Describe the reaction force
Describe friction
Outline how rockets and jet engines work
Describe a resultant force and its affect
Define and use momentum
Define and use Newton’s second law
Explain the affect of road safety measures
Define and use kinetic energy
Define and use gravitational potential energy
Define and use work
Discuss energy transfers with and without air resistance
Recall and use the law of conservation of energy
pre
post
1. What is speed?
1.
2.
3.
4.
The rate of change of distance
The rate of change of displacement
The product of force and distance
The rate of change of velocity
2. Average speed is:
1.
2.
3.
4.
The distance divided by time at any point
The total distance divided by the total time
The difference between speed and velocity
The velocity divided by the acceleration
3. What is displacement?
1.
2.
3.
4.
The total distance
The difference between distance and speed
The distance in a given direction
The speed in a given direction
4. What is this object doing?
1.
2.
3.
4.
Accelerating
Decelerating
Not moving
Travelling at a constant
speed
5. What is this object doing?
1.
2.
3.
4.
Accelerating
25%
Decelerating
Not moving
Travelling at a constant
speed
1
25%
25%
2
3
25%
4
6. What is velocity?
1.
2.
3.
4.
The rate of change of distance
25% 25%
25%
The rate of change of displacement
The product of force and distance
The rate of change of velocity
1
2
3
25%
4
7. What is this object doing?
1.
2.
3.
4.
Accelerating
25%
Decelerating
Not moving
Travelling at a constant
speed
1
25%
25%
2
3
25%
4
8. What is this object doing?
1.
2.
3.
4.
Accelerating
Decelerating
Not moving
Travelling at a
constant speed
25%
1
25%
25%
2
3
25%
4
9. Which is not a method of catching speeders?
1.
2.
3.
4.
Gatso speed cameras 25%
Truvelo speed cameras
Police radar guns
Gamma ray cameras
1
25%
25%
2
3
25%
4
10. What is not a definition of a force?
1. Something which causes an acceleration
2. Something which deforms an object
3. Something which changes an objects
direction
4. Something which is a scalar quantity
Participant Scores
0
0
Participant 1
Participant 2
0
0
Participant 3
Participant 4
0
Participant 5
11. The object was not moving. What
is it doing now?
1.
2.
3.
4.
Accelerating downwards
Accelerating upwards
Stationary
Moving at a constant
speed downwards
12. This object was moving
downwards. What is it doing now?
1.
2.
3.
4.
Accelerating downwards
25%
Accelerating upwards
Stationary
Moving at a constant
speed downwards
1
25%
25%
2
3
25%
4
13. This object was moving
downwards. What is it doing now?
1.
2.
3.
4.
Accelerating downwards
Accelerating upwards
Stationary
Moving at a constant
speed downwards
14. What is Newton’s third law?
1.
2.
3.
4.
For every action, there is an equal and opposite reaction
An object will continue in motion unless acted on by an
external force
Force is the rate of change of momentum
Matter cannot be created or destroyed, only changed
15. What is the normal force?
1.
2.
3.
4.
Another name for friction 25% 25% 25% 25%
An electrostatic repulsion between objects
The force holding the atomic nucleus together
The force which exists under standard temperature
and pressure
1
2
3
4
16. Which letter is friction?
1.
2.
3.
4.
A
B
C
D
25%
1
25%
25%
2
3
25%
4
17. Work is:
1.
2.
3.
4.
force x distance
mass x acceleration
speed x time
mass x velocity
25%
1
25%
25%
2
3
25%
4
18. What is the equation for kinetic energy?
1.
2.
3.
4.
mgh
½mv2
ma
mv
25%
1
25%
25%
2
3
25%
4
19. Why do we usually ignore air
resistance?
1.
2.
3.
4.
To make calculations easier25% 25% 25%
To make calculations easier
To describe the natural world more accurately
To annoy new physics students
1
2
3
25%
4
20. What is the law of conservation of energy
1.
2.
3.
4.
Energy cannot be created
25%or destroyed
25%
25%
Energy can never be changed
Energy is running out quickly
Energy is running out slowly
1
2
3
25%
4
Participant Scores
0
0
Participant 1
Participant 2
0
0
Participant 3
Participant 4
0
Participant 5
P4.1.1
DEFINE AND USE SPEED
P4.1.2
DESCRIBE THE DIFFERENCE BETWEEN
AVERAGE AND INSTANTANEOUS SPEED
P4.1.3
RECALL AND USE ‘DISPLACEMENT’
P4.1.4
DRAW AND INTERPRET DISTANCETIME GRAPHS
P4.1.5
RECALL AND USE ‘VELOCITY’
P4.1.6
DRAW AND INTERPRET VELOCITYTIME GRAPHS
P4.1.7
USE EXAMPLES OF APPLICATIONS
OF RECORDING MOTION
P4.2.1
RECALL AND UNDERSTAND THAT A
FORCE ARISES FROM THE INTERACTION
OF TWO OBJECTS
P4.2.2
USE ARROWS TO DESCRIBE THE
EFFECT OF FORCES
P4.2.3
UNDERSTAND NEWTON’S THIRD
LAW OF MOTION
P4.2.4
DESCRIBE THE REACTION FORCE
P4.2.5
DESCRIBE ‘FRICTION’
P4.2.6
OUTLINE HOW ROCKETS AND JET
ENGINES WORK
P4.3.1
DESCRIBE A RESULTANT FORCE AND
ITS EFFECT
P4.3.2
DEFINE AND USE MOMENTUM
P4.3.3
DEFINE AND USE NEWTON’S
SECOND LAW
P4.3.3
EXPLAIN THE ACTION OF ROAD
SAFETY MEASURES
P4.4.1
DEFINE AND USE KINETIC ENERGY
P4.4.1
DEFINE AND USE GRAVITATIONAL
POTENTIAL ENERGY
P4.4.1
DEFINE AND USE WORK
P4.4.1
DISCUSS ENERGY TRANSFERS WITH
AND WITHOUT AIR RESISTANCE
P4.4.1
RECALL THE LAW OF
CONSERVATION OF ENERGY