College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

تمرين 99

A 0.20-kg rubber ball is dropped from a height of 1.0 m above the floor and it bounces back to a height of 0.70 m. (a) What is the ball's speed just before hitting the floor (b) What is the speed of the ball just as it leaves the ground (c) How much energy was lost and where did it go