posted by Mohanad .
A 0.240-kg billiard ball that is moving at 3.00 m/s strikes the bumper
of a pool table and bounces straight back at 2.40 m/s (80% of its original
speed). The collision lasts 0.0150 s. (a) Calculate the average force
exerted on the ball by the bumper. (b) How much kinetic energy in joules
is lost during the collision? (c) What percent of the original energy is left