Lever: A lever is a simple machine. A lever is a board or bar that rests on a turning point. This turning point is called the fulcrum. An object that a lever moves iscalled the load. The closer the object is to the fulcrum, the easier it is to move.
Example: lever being used to move a rock. The rock is the load. The place that the board rests on iscalled the fulcrum. Using this lever makes the work of moving the rock a lot easier.
Inclined Plan: An inclined plane is a simple machine. It is a flat surface that is higher on oneend. Inclined planes make the work of moving things easier. You would need less energy and force to move objects with an inclined plane.
Example: You can use this machine to move an object to alower or higher place.
Wheel and Axle: The wheel and axle is another simple machine. The axle is a rod that goes through the wheel. This lets the wheel turn. It is easy to move things fromplace to place with wheels and axles. Example: a wheel and axle on a car.
Screw: A screw is a simple machine that is made from another simple machine. It is actually an inclined plane thatwinds around itself. A screw has ridges and is not smooth like a nail. Some screws are used to lower and raise things. They are also used to hold objects together
Wedge: A wedge is asimple machine used to push two objects apart. A wedge is made up of two inclined planes. These planes meet and form a sharp edge. This edge can split things apart.
Pulley: This simple machineis made up of a wheel and a rope. The rope fits on the groove of the wheel. One part of the rope is attached to the load. When you pull on one side of the pulley, the wheel turns and theload will move. Pulleys let you move loads up, down, or sideways. Pulleys are good for moving objects to hard to reach places. It also makes the work of moving heavy loads a lot easier.