Is a force needed to make it bounce back up? If so, what exert the force?

Question

When a golf ball is dropped to the pavement, it bounce up.

Answer 1

The ball deforms slightly storing energy as it compresses and springs up as it returns to it's original shape.

If the surface didn't give AT ALL, and the ball was perfectly hard--ie., no elasticity--it wouldn't bounce.

Answer 2

Newton's Third Law states, "For every action force, there is an equal and opposite reaction force." So, when the golf ball exerts a force on the pavement, naturally, the pavement must exert the same force back on the golf ball. This explains why the golf ball will bounce back up. Although, some energy is lost as heat, caused by the friction between the ball and the pavement. That is why the ball does not bounce back up to the original location.

Answer 3

Holding thie gold ball in the air, it has potential energy.
Dropping the ball, gravity and friction now come into play, and it is gaining kinetic energy. Momemtum also. It hits the pavement and deforms (slightly) which disipates some of the energy (an inelastic collision). The ball unsquashes and, due to the pavement exerting a force on the golfball equal to the force that the golf ball exerted on it, bounces back up in the air and is affected by friction and gravity which is why if you missed catching it, it would slow to a stop, and drop to the pavement again =o)

Answer 4

It's called restitution. When the GB hits the pavement, it compresses, like a spring. And, like a spring that is compressed, it springs back when released, which, for the GB, is as soon as the force of the impact is overpowered by the compression force.

The so-called coefficient of elasticity e is a measure of how much restitution the GB will do. e = 1.0, for example, means all its shape will be restored on rebounding. e = 0 means the ball is probably a piece of clay that will not rebound at all, but go splat.

Answer 5

gravity