# A Rolling Ball ## Rolling Ball

A rolling ball is a physical object that is in motion. It is an example of kinetic energy, which is the energy of objects in motion. The ball has potential energy, which is the energy of an object at rest. When the ball is rolling, the potential energy is converted into kinetic energy.

### The Law of Conservation of Energy

The law of conservation of energy states that energy can neither be created nor destroyed. Therefore, when the ball is rolling, the energy is being transferred from the potential energy to kinetic energy and vice versa. Eventually, the ball stops rolling because the kinetic energy is converted back into potential energy.

#### Friction

The primary cause of the ball's motion stopping is friction. Friction is the resistance created when two objects come into contact with each other. When the ball is rolling, it encounters friction from the surface it is rolling on, which causes it to slow down and eventually stop.

##### Conclusion

The energy of a rolling ball eventually comes to a stop because of friction. The ball's potential energy is converted into kinetic energy and vice versa. The law of conservation of energy states that energy can neither be created nor destroyed, so it is converted back into potential energy when the ball stops rolling.