Question

An object with a mass of `2 kg` is hanging from an axle with a radius of `3 m`. If the wheel attached to the axle has a radius of `12 m`, how much force must be applied to the wheel to keep the object from falling?

Answer 1

The force is `=4.9N`

Explanation:

The load `L=(2g)N`

Radius of axle `r=3m`

Radius of wheel `R=12m`

Taking moments about the center of the axle

`F*R=L*r`

`F*12=2g*3`

`F=(2*g*3)/12=4.9N`

The force is `F=4.9N`