Explain how work is done when a ball impacts with the ground.

answer:

Explanation:

depends on the floor, the ball, and the speed

answer: When the object falls to the ground, it gives up its energy in the form (largely) of heat. The energy released when it hits the ground should nicely balance the energy gained during the ride upward. Since force is absent during the fall, there's no work and no violation of any principal in physics. When it hits the floor it has no potential energy, but lots of kinetic energy. Another interesting thing happens when the ball hits the floor. Remember that the ball bounces back up to a height lower than it started, so after one bounce it has less potential energy than it started with.