Question

An object with a mass of `8 kg` is hanging from an axle with a radius of `15 cm`. If the wheel attached to the axle has a radius of `75 cm`, how much force must be applied to the wheel to keep the object from falling?

Answer 1

The force applied is `=15.68N`

Explanation:

The load `=(8g)N`

Radius of axle `r=0.15m`

Radius of wheel `R=0.75m`

Taking moments about the center of the axle

`F*0.75=8*g*0.15`

`F=(8*g*0.15)/0.75=15.68N`