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 `25 m`, how much force must be applied to the wheel to keep the object from falling?

Answer 1

The force is `F=1.6N`

Explanation:

The load is `L=2gN`

The radius of the axle is `r=2m`

The radius of the wheel is `R=25m`

The effort is `=FN`

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

Taking moments about the center of the axle

`F*25=2g*2`

`F=(2g*2)/25=1.6N`

The force is `F=1.6N`