500
A ball is dropped from the same height upon various flat surfaces. The ball bounces back quickly on the first surface, bounces back in a longer amount of time on the second surface, and takes a while to bounce back on the third surface. Compare the amount of force each experience.
What is the ball that stays in contact with the ground the longest experiences the least amount of force and the balls experience more force as they stay in contact with the ground smaller amounts of time?