The MA of a wheel and axle can be calculated by the ratio of the radius of the wheel to the radius of the axle. If an axle has a radius of 2 in and the wheel has a radius of 6 in, what is the MA of the wheel/axle?
The work you put into a machine -- the input force -- is the force you apply times the distance you apply it. The work done by the machine equals the resisting weight times the distance it moves when you perform the work.
