Simple Machines

Levers, ramps and pulleys are all simple machines.

 A lever uses a rigid bar and a fulcrum to lift objects.

An inclined plane or ramp is used to move objects up and down different levels. A pulley uses a wheel and a rope to lift heavy objects.

A screw is an inclined surface around a shaft.


Watch the following video about simple machines! It will be useful for you to understand everything!