Answer:

It depends on the momentum of the object.  

Explanation:

By calculating the change in momentum between the fall and the bounce and dividing the result by the amount of time between these two points, you can get an estimate for the impact force.

Answer:

ke = 1/2 * m * v^2

Explanation:

The velocity is related to the speed with which it is thrown or dropped, the height from which it has fallen, and acceleration due to gravity.