Question

An object with a mass of `4 kg` is hanging from an axle with a radius of `39 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 `=101.9N`

Explanation:

The load L=(4g)N#

Radius of axle `r=39m`

Radius of wheel `R=15m`

Taking moments about the center of the axle

`F*R=L*r`

`F*15=4*g*39`

`F=(4*g*39)/15=101.9N`