Question

An object with a mass of `1 kg` is hanging from an axle with a radius of `16 m`. If the wheel attached to the axle has a radius of `72 m`, how much force must be applied to the wheel to keep the object from falling?

Answer 1

The force is `F=2.18N`

Explanation:

The load is `L=1gN`

The radius of the axle is `r=16m`

The radius of the wheel is `R=72m`

The effort is `=FN`

The acceleration due to gravity is `g=9.8ms^-2`

Taking moments about the center of the axle

`F*72=1g*16`

`F=(1g*16)/72=2.18N`

The force is `F=2.18N`