Swinging
One special type of motion is when something moves back and forth again and again. For example, when you ride on a swing, you move back and forth from side to side. As another example, if you hang something on a spring and pull down on it, it will bounce up and down.
In order to understand the physics of swinging and bouncing, we will start with an introduction to energy, since energy is at the heart of this kind of motion. We will then learn about what happens when you hang something on a spring and when you make it bounce up and down. We will then learn about swings and several other kinds of things that move back and forth.
