What exactly are the six simple machines?
The lever is one of the simple machines and the first one we are going to talk about. A lever is a rigid bar that rotates around a fixed point called a fulcrum. You use effort to make the load move. There are three types of levers. First is the Class 1 lever, it has the fulcrum in the middle of the load and the effort. Next is the Class 2 lever, it has the fulcrum at one end, the effort at the other, and the load in the middle. Finally there is the Class 3 lever, it has the fulcrum at one end, the load at the other end and the effort in the middle.