Question

An object with a mass of `5 kg` is hanging from an axle with a radius of `30 m`. If the wheel attached to the axle has a radius of `9 m`, how much force must be applied to the wheel to keep the object from falling?

Answer 1

The force is `=1.63N`

Explanation:

The load `L=(5g)N`

Radius of axle `r=0.3m`

Radius of wheel `R=9m`

Taking moments about the center of the axle

`F*R=L*r`

`F*9=5*g*0.3`

`F=(5*g*0.3)/9=1.63N`

The force is `F=1.63N`