Motion

Question 1

Speed is the rate of change

Answer 1

of distance – it is the distance travelled per unit of time.

Question 2

Distance is

Answer 2

how far an object moves

Question 3

speed =

Answer 3

distance / time

Question 4

A car travels 500 m in 50 s, then 1,500 m in 75 s. Calculate its average speed for the whole journey.

Answer 4

16m/s

Question 5

For a moving object, the distance travelled can be represented by a

Answer 5

distance-time graph.

Question 6

A horizontal line on a distance-time graph shows that the object is (1)________, while a sloping line on a distance-time graph shows that the (2)______

Answer 6

1) stationary (not moving)
2) object is moving.

Question 7

The speed of an object can be calculated from

Answer 7

the gradient of a distance-time graph.

Question 8

Acceleration is the amount that

Answer 8

velocity changes per unit time.

Question 9

Acceleration =

Answer 9

Change in velocity / Time taken

Question 10

A car takes 25 s to accelerate from 20 m/s to 30 m/s. Calculate the acceleration of the car.

Answer 10

final velocity, v = 30 m/s
initial velocity, u = 20 m/s
change in velocity, v - u = (30 - 20) = 10 m/s

Question 11

For a moving object, the velocity can be represented by a

Answer 11

velocity-time graph.

Question 12

A horizontal line on a velocity-time graph, shows that the object is 1)_____, but a sloping line on a velocity-time graph, shows that the 2)_____.

Answer 12

1)at constant velocity
2)object is accelerating

Question 13

The gradient of the line is equal to the

Answer 13

acceleration of the object.