A screw is an example of the simple machine known as a wedge.
Inclined plane wrapped around an axle.
incline plane
It is an inclined plane.
screw
screw
screw
A ramp.
Screw
A bolt is a screw I think.
inclined plane
A screw
Screw
inclined plane and screw
inclined plane and screw
A screw is an inclined plane wrapped around a wheel.