Question

An object with a mass of `2 kg` is hanging from an axle with a radius of `2 m`. If the wheel attached to the axle has a radius of `8 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 `=(2g)N`

Radius of axle `r=2m`

Radius of wheel `R=8m`

Taking moments about the center of the axle

`F*8=2*g*2`

`F=(2*g*2)/8=4.9N`