Lever.
a screw
all of them
There are four simple machines used to make the compound machine known as the lawn mower. These simple machines are the wheel and axle, the screw, the lever, and the wedge.
pulley and rope
A lever.
wheel and axle
lever and pulley
a lever and a well with a bucket.
Wwho cares!?
Rims and tires
A compound machine.