Question

An object with a mass of `4 kg` is hanging from an axle with a radius of `5 m`. If the wheel attached to the axle has a radius of `35 m`, how much force is needed to raise the object?

Answer 1

The force is `F=5.6N`

Explanation:

The load is `L=4gN`

The radius of the axle is `r=5m`

The radius of the wheel is `R=35m`

The effort is `=FN`

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

Taking moments about the center of the axle

`F*35=4g*5`

`F=(4g*5)/35=5.6N`

The force is `F=5.6N`