2 Motion 2020 JnN

The speed–time graph represents a journey.

How does the graph show that the distance travelled in section X of the journey is greater than the distance travelled in section Y?

• The area below section X of the graph is greater than the area below section Y.

• The gradient of section X of the graph is greater than the gradient of section Y.

• The speed at the end of section X of the journey is greater than the speed at the end of section Y.

• The time for section X of the journey is greater than the time for section Y.

A boy throws a ball vertically upwards with a speed v.

Which row describes the speed and the acceleration of the ball at point X on the way upwards?

• decreasing; upwards

• decreasing; downwards

• increasing; upwards

• increasing; downwards

A car driver measures the time taken to complete four separate journeys.

In which journey does the driver have the greatest average speed?

The graph shows how the speed of an object varies with time. Which row describes the motion of the object at times P and Q?

• P: at rest, Q: accelerating

• P: at rest, Q: decelerating

• P: moving with constant speed, Q: accelerating

• P: moving with constant speed, Q: decelerating

The diagram shows the distance–time graph for the motion of an object.

How can the motion of the object be described?

• at rest, then constant deceleration

• at rest, then constant speed

• constant speed, then constant acceleration

• constant speed, then constant deceleration

An athlete runs 300 m up a hill in 100 s.

She then runs down the same hill in 50 s.

What is her average speed for the whole run?

• 2.0 m/s

• 4.0 m/s

• 8.0 m/s

• 9.0 m/s

A car is travelling at a velocity of 2.0 m/s.

It accelerates at a constant 0.20 m/s² for 2.5 minutes.

What is the final velocity of the car?

• 2.5 m/s

• 5.2 m/s

• 30 m/s

• 32 m/s

A concrete block falls vertically from an aeroplane.

The concrete block falls into the sea and sinks.

Which graph shows the vertical motion of the concrete block?

Object P moves at a constant speed of 5 m/s repeatedly backwards and forwards in a straight line. Object Q moves at a constant speed of 5 m/s vertically downwards.

Object R moves at a constant speed of 5 m/s in a circle.

Which objects are moving with uniform velocity?

• P only

• Q only

• R only

• Q and R

The diagram shows a velocity–time graph for an object which is accelerating.

What is the acceleration of the object?

• 0.40 m/s²

• 2.5 m/s²

• 3.0 m/s²

• 100 m/s²