Simple machine

A basic tool that is used to do work

Inclined plane

A flat surface with one end higher than the other like a dump truck , wheelbarrow.

Wedge

An object that is thick at one edge, tempered to a thin edge at the other

Screw

An inclined plane that is wrapped around a cylinder

Lever

A straight bar that pivots on or around a fulcrum, first class , second class, third class.

Wheel and axle

A wheel attached to a bar so that they rotate together

Pulley

A chain, belt, or rope wrapped around a wheel
Simple machine can help us to do thing that we can't doin are live