Question

An object with a mass of `6 kg` is hanging from an axle with a radius of `9 m`. If the wheel attached to the axle has a radius of `18 m`, how much force must be applied to the wheel to keep the object from falling?

Answer 1

The force is `=29.4N`

Explanation:

The load is `L=6gN`

The radius of the axle is `r=9m`

The radius of the wheel is `R=18m`

The effort is `=FN`

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

Taking moments about the center of the axle

`F*18=6g*9`

`F=(6g*9)/18=29.4N`

The force is `F=29.4N`