Question

An object with a mass of `5 kg` is hanging from an axle with a radius of `18 m`. If the wheel attached to the axle has a radius of `6 m`, how much force must be applied to the wheel to keep the object from falling?

Answer 1

The force is `F=147N`

Explanation:

The load is `L=5gN`

The radius of the axle is `r=18m`

The radius of the wheel is `R=6m`

The effort is `=FN`

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

Taking moments about the center of the axle

`F*6=5g*18`

`F=(5g*18)/6=147N`

The force is `F=147N`