Motion

Question 0

Velocity

Answer 0

Rate of change of displacement

Question 1

Displacement

Answer 1

Distance travelled in a particular direction

Question 2

To calculate the velocity

Answer 2

Increase in displacement ➗time taken

Question 3

a = (v-u)/t

Answer 3

Acceleration = change in velocity ➗ time taken

Question 4

Speed definition

Answer 4

Rate of change of distance

Question 5

The gradient of a velocity time graph is equal to

Answer 5

The acceleration

Question 6

The area under a velocity time graph is equal to

Answer 6

the distance travelled by the object in a particular time interval

Question 7

Shallow gradient on velocity time graph

Answer 7

Low acceleration

Question 8

Steep gradient on velocity time graph

Answer 8

High acceleration

Question 9

Horizontal (zero gradient) on velocity time graph

Answer 9

No acceleration

Question 10

Negative gradient on velocity time graph

Answer 10

Negative acceleration (deceleration)

Question 11

Straight line on distance time graph

Answer 11

Object moving at constant speed

Question 12

Scalars

Answer 12

Have a magnitude (size) only

Question 13

Examples of scalar quantities 4

Answer 13

Temperature
Time
Distance
Speed

Question 14

Examples of vectors 3

Answer 14

Force
Displacement
Velocity

Question 15

In a distance time graph the gradient is equal to

Answer 15

The velocity

Question 16

Why does the GPE decrease as the ball gets closer to the ground

Answer 16

Because the height above the ground is getting smaller

Question 17

Why is the GPE converted into kinetic energy

Answer 17

Conservation of energy - energy not created or destroyed, just transferred into different types

Question 18

Why does the ball accelerate towards the ground

Answer 18

Because it is gaining kinetic energy

Question 19

Energy changes when the ball is squashed

Answer 19

The kinetic energy is converted into elastic potential energy

Question 20

Energy changes that cause the squashed ball to move back into the air

Answer 20

Ball converts the elastic potential energy back into kinetic energy

Question 21

Energy at the peak of the bounce

Answer 21

All the kinetic energy has been converted into GPE

Question 22

Energy at the point where the ball is about to hit the ground

Answer 22

All the GPE has been converted into kinetic energy

Question 23

Why is the bounce not as high as the release height

Answer 23

Some of the energy has been transferred to the surroundings in the form of sound & thermal energy

Question 24

Once the ball has come to rest, what has happened to all the original GPE?

Answer 24

It has all been transferred to the surroundings

Question 25

Why is force a vector

Answer 25

The size of a force and the direction in which it acts are both important

Question 26

If the line is horizontal in a distance time graph

Answer 26

The object is stationary

Question 27

Newtons 2nd law of motion

Answer 27

Resultant force is directly proportional to acceleration

Question 28

Speed definition

Answer 28

The magnitude of velocity when the motion is in a straight line in one direction only

Question 29

If the line slopes down to the right (negative gradient) on a DISTANCE-time

Answer 29

The distance that the object is from the starting point is now decreasing - the object is now retracing it's path back to the start

Question 30

If the line is horizontal on a distance time graph

Answer 30

The object is stationary

Question 31

Distance definition referencing displacement

Answer 31

The magnitude of displacement when the motion is in a straight line in one direction only

Question 32

Acceleration relation to mass observation & conclusion

Answer 32

1)On objects with the same mass, a smaller force will produce smaller acceleration than a larger force 2) acceleration is inversely proportional to mass Eg doubling the mass will halve the acceleration

Question 33

Acceleration relation to force observation & conclusion

Answer 33

1) when the same force is applied to objects with a different mass, the smaller mass will experience a greater acceleration 2) force is proportional to acceleration Eg doubling the force acting on an object doubles it's acceleration

Question 34

Why is excessive deceleration unwanted example

Answer 34

If the brakes are applied too hard, the tyres will not grip the road surface & the car will skid

Question 35

If you are designing a car for high acceleration, what does the equation f=ma tell you?

Answer 35

The car should have a low mass | The engine should supply a high acceleration force

Question 36

Newton's third law of motion

Answer 36

When two objects interact, the forces they exert on each other are equal and opposite