Changes In Momentum (physics Only) (GCSE Physics)

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 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 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 car and a stationary truck collide and stick together (perfectly inelastic). Which of the following is always true for the system (car + truck) during the collision (neglect external forces)?

A 0.25 kg ball moving at 8.0 m/s hits a wall and rebounds with speed 6.0 m/s in the opposite direction. What is the magnitude of the change in momentum of the ball?

A 4.0 kg cart moving at 2.5 m/s collides elastically with a 1.0 kg cart moving toward it at 1.5 m/s. What is total momentum before collision? (Take right as positive)

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

A skateboarder (total mass 60 kg) moving at 6 m/s applies brakes that provide a constant backward force producing an impulse of -360 N·s. What is the skateboarder’s final speed?

Which quantity is conserved for an isolated system in any collision (elastic or inelastic)?

A force–time graph shows a triangular pulse with peak force 200 N lasting 0.5 s (triangular shape to zero). What impulse is delivered?