Question

An object with a mass of `4 kg` is hanging from an axle with a radius of `5 m`. If the wheel attached to the axle has a radius of `35 m`, how much force must be applied to the wheel to keep the object from falling?

Answer 1

The force is `=5.6N`

Explanation:

The load `L=(4g)N`

Radius of axle `r=5m`

Radius of wheel `R=35m`

Taking moments about the center of the axle

`F*R=L*r`

`F*35=4*g*5`

`F=(4*g*5)/35=5.6N`

The force is `F=5.6N`