Question

An object with a mass of `4 kg` is hanging from an axle with a radius of `36 m`. If the wheel attached to the axle has a radius of `15 m`, how much force must be applied to the wheel to keep the object from falling?

Answer 1

The force is `=94.1N`

Explanation:

The load is `L=4gN`

The radius of the axle is `r=36m`

The radius of the wheel is `R=15m`

The effort is `=FN`

The acceleration due to gravity is `g=9.8ms^-2`

Taking moments about the center of the axle

`F*15=4g*36`

`F=(4g*36)/15=94.1N`

The force is `F=94.1N`