What exactly are the six simple machines?

The Lever

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.

The Wheel and Axle

The wheel and axle is the second simple machine we're going to talk about. It is made up of a small cylinder (the axle) joined to larger cylinder (the wheel). It is used to move heavy loads usually across the ground.

The Screw

The screw is the third simple machine we are going to talk about. It is basically just an inclined plane that is coiled around a shaft. It also converts rotational motion into linear motion.

The Wedge

The wedge is the fourth simple machine that we will be talking about. It is basically to inclined planes sandwiched together. It changes the force from moving downwards to outwards.

The Inclined Plane

This is the fifth simple machine that we are talking about. It is a tilted surface. The steeper the slope the more effort it takes to push/pull something up.

The Pulley

This is the final simple machine we are talking about. It makes work easier by changing direction of the force. It makes it easier by allowing the person to pull down on the rope he can add his own weight to the effort rather than just lifting the load.