AS Physics projectile motion

A ball is kicked from point P on level ground. The ball initially travels at 45° to the horizontal.

The ball reaches its maximum height after a time of 2.0 s.

Air resistance can be ignored. What is the displacement of the ball from P when at its maximum height?

• 20 m

• 40 m

• 45 m

• 60 m

A ball X is projected horizontally from a certain point at the same time as a ball Y of the same diameter but twice the mass is released from rest and allowed to fall vertically from the same level. Air resistance is negligible. Which one of the following will occur?

• Y will hit the floor just before X

• X will hit the floor just before Y

• X and Y will hit the floor at the same time

• Y hits the floor while X is half way to the floor

P and Q are two balls of the same diameter. P has a greater mass than Q.

Both balls are projected at the same time from the top of a tall building that stands on horizontal ground.

Both balls are projected with the same horizontal velocity.

P reaches the ground after time t_P and at a horizontal distance d_P from the building.

Q reaches the ground after time t_Q and at a horizontal distance d_Q from the building.

The air is still and air resistance is not negligible.

Which row is correct?

• A

• B

• C

• D

A golf ball was hit from the surface of the Moon. The time of flight was 4.0 s.

What is the best estimate for the maximum height reached by the ball?

acceleration due to gravity on the Moon = 1.6 m s^–2

• 3 m

• 15 m

• 40 m

• 80 m

The diagram shows the path of a projectile launched from ground level with a speed of 25 m s^–1 at an angle of 42° to the horizontal. What is the horizontal distance from the starting point of the projectile when it hits the ground?

• 23 m

• 32 m

• 47 m

• 63 m

Two identical balls, X and Y, are at the same height and a horizontal distance of 25 cm apart.

X is projected horizontally with a velocity of 0.10 m s^–1 towards Y at the same time that Y is released from rest. Both X and Y move freely in the absence of air resistance.

What is the distance between the balls 1.0 s later?

• 0.15 m

• 0.25 m

• 2.4 m

• 4.9 m

Three objects U, V and W leave the edge of a bench at the same time.

The objects fall in the same vertical plane with negligible air resistance.

U is released from rest so that it falls vertically.

V and W are projected horizontally.

The paths of the three objects are shown. Which statement is correct?

• U hits the floor before V and W.

• W hits the floor before V.

• W hits the floor with the greatest speed.

• U hits the floor with the greatest speed.

A projectile is launched with a speed of 25 m s^–1 at an angle of 35° to the horizontal, as shown in the diagram.

Air resistance is negligible.

What is the time taken for the projectile to return to the ground?

• 1.5 s

• 2.1 s

• 2.9 s

• 4.2 s