Machines make work easier.

This is a simple machine.A lever

Machines make work easier.

This is a simple machine.A pulley.

Machines make work easier.

This is a simple machine.Inclined plane.

Machines make work easier.

This is a simple machine.Screw.

Machines make work easier.

This is a simple machine.Wheels and axle.

Machines make work easier.

This is a simple machine.Wedge.

Simple machines have 1,2,3 or 4 pieces.