Question

An object with a mass of `3 kg` is hanging from an axle with a radius of `9 m`. If the wheel attached to the axle has a radius of `7 m`, how much force is needed to raise the object?

Answer 1

The force is `=37.8N`

Explanation:

The load L=(3g)N#

Radius of axle `r=9m`

Radius of wheel `R=7m`

Taking moments about the center of the axle

`F*R=L*r`

`F*7=3*g*9`

`F=(3*g*9)/7=37.8N`