We use wheel and axle
We use gears
We use a pulley
We use a wedge
We use an inclined plane
We use lever
We use screw
to cut objects.
to lift objects.
to push objects up or down.
to move or lift objects.
to reduce friction of the moving vehicle with the ground.
to hold objects together — such as wood — and to position objects.
to change the direction of movement and/or increase the output speed or torque.