Changes In Momentum (physics Only) (GCSE Physics)

Which statement about impulse is correct?

During an explosion a stationary shell of mass 10 kg breaks into two fragments of 3 kg and 7 kg which fly apart with velocities +8 m/s and v m/s respectively. What is v?

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?

Which scenario shows momentum is a vector quantity?

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?

Which safety feature reduces the force on a passenger by increasing the time over which momentum is brought to zero?

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

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?

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?