A 10 g bullet moving 1000 m/s strikes and passes through a 2.0-kg block initially at rest,

Question:

A 10 g bullet moving 1000 m/s strikes and passes through a 2.0-kg block initially at rest, as shown. The bullet emerges from the block with a speed of 400 m/s.
(a) How much energy was lost in the collision?
(b) Calculate the average force exerted on the block assuming that the impact time is 10-4s.
(c) To what maximum height will the block rise above its initial position?