Changes In Momentum (physics Only) (GCSE Physics)

A 5.0 kg object accelerates from 2.0 m/s to 12.0 m/s in 4.0 s. What average force acted on it?

A 0.8 kg ball is moving right at 10 m/s and strikes a wall, reversing to left at 6 m/s. If contact time is 0.04 s, what average force acted on the ball (magnitude)?

Two ice skaters push off each other. Before push both at rest; after push one skater of mass 50 kg moves at 1.2 m/s. What is the velocity of the other skater of mass 75 kg? (Conserve momentum)

A bus of mass 12 000 kg and a car of mass 1200 kg are moving at the same speed. Which has greater momentum?

A 0.15 kg pellet is fired at 200 m/s and embeds in a wooden block of mass 2.0 kg at rest. What speed does block+pellet have immediately after?

A ball of mass 0.40 kg moving right at 10 m/s collides elastically with a stationary ball of mass 0.40 kg. After collision what is speed of the first ball?

A 0.20 kg ball hits a paddle and stops in 0.02 s. The average force on the ball is 150 N opposite to motion. What was the ball’s speed immediately before impact?

A 0.50 kg toy car is moving at 4.0 m/s. What is its momentum?

A ball bounces off a wall; contact time with wall is shortened. How does this affect the peak force on the ball (assuming same change in speed)?

A lorry of mass 2000 kg slows from 20 m/s to 5 m/s in 10 s. What is the change in momentum of the lorry?

If a car of mass 1200 kg traveling at 15 m/s is brought to rest by a constant braking force of 18 000 N, how long does braking take?