3N Kinematics

What is the approximate acceleration of free fall for a body near to the Earth?

• 0.1 m/s2

• 1 m/s2

• 10 m/s2

• 100 m/s2

A speed-time graph of an object moving in a straight line is shown.

How far does the object travel in 50 s?

• 500 m

• 600 m

• 800 m

• 1000 m

The graph represents the motion of a car.

How far has the car moved between 0 and 5 s?

• 2 m

• 10 m

• 25 m

• 50 m

Which graph shows the acceleration of free-fall for an object at different heights above the Earth?

• A

• B

• C

• D

A car accelerates uniformly from 20 m/s to 30 m/s. During this acceleration, the car travels 100 m. The average speed is 25 m/s. What is the acceleration of this car?

• 2.5 m/s2

• 5.0 m/s2

• 7.5 m/s2

• 40 m/s2

An object is falling freely in a vacuum near the Earth's surface. Which word describes the acceleration of the object?

• constant

• decreasing

• increasing

• zero

What is used to calculate the value of a uniform acceleration?

• area under a speed-time graph

• change in speed / time taken

• change in velocity / time taken

• gradient of a distance time graph

Two runners are in a race. The diagram shows a speed-time graph for the two runners.

Which statement is correct?

• After 8.0 s, runner X has travelled 32 m further than runner Y.

• After 8.0 s, runner Y has travelled 4.0 m further than runner X.

• The runners have travelled the same distance after 4.0 s

• The runners have travelled the same distance after 7.0 s.

A car takes 60 minutes to travel 100 km along a main road and then 30 minutes to travel 20 km along a side road.

What is the average speed of the car for the whole journey?

• 40 km/h

• 70 km/h

• 80 km/h

• 100 km/h

A car moving at 40 km/h speeds up with constant acceleration for 3 minutes, reaching a final speed of 80 km/h. What is the distance travelled during this time?

• 6.0 km

• 4.0 km

• 3.0 km

• 2.0 km