Kinematics

What gives the value of a body’s acceleration?

• the area under its displacement-time graph

• the area under its velocity-time graph

• the gradient of its displacement-time graph

• the gradient of its velocity-time graph

A stone is dropped from the top of a tower of height 40 m. The stone falls from rest and air resistance is negligible.

What time is taken for the stone to fall the last 10 m to the ground?

• 0.38 s

• 1.4 s

• 2.5 s

• 2.9 s

The diagram shows a velocity-time graph for a vehicle. The vehicle, moving at 4.0 m s^-1, begins to accelerate at time = 0. What is the vehicle’s acceleration at time = 3.0 s?

• 0.67 m s^-2

• 1.0 m s^-2

• 1.3 m s^-2

• 2.0 m s^-2

The diagram shows a laboratory experiment in which a feather falls from rest in a long evacuated vertical tube of length L.

The feather takes time T to fall from the top to the bottom of the tube.

How far will the feather have fallen from the top of the tube in time 0.50T?

• 0.13L

• 0.25L

• 0.38L

• 0.50L

A brick is dislodged from a building and falls vertically under gravity.

Which graph best represents the variation of its height h above the ground with time t if air resistance is negligible?

• A

• B

• C

• D