Question

An object with a mass of `4 kg` is hanging from an axle with a radius of `15 m`. If the wheel attached to the axle has a radius of `18 m`, how much force is needed to raise the object?

Answer 1

The force is `=32.7N`

Explanation:

The load L=(4g)N#

Radius of axle `r=15m`

Radius of wheel `R=18m`

Taking moments about the center of the axle

`F*R=L*r`

`F*18=4*g*15`

`F=(4*g*15)/18=32.7N`