Question

An object with a mass of `3 kg` is hanging from an axle with a radius of `16 cm`. If the wheel attached to the axle has a radius of `2 cm`, how much force must be applied to the wheel to keep the object from falling?

Answer 1

The force is `F=235.2N`

Explanation:

The load is `L=3gN`

The radius of the axle is `r=0.16m`

The radius of the wheel is `R=0.02m`

The effort is `=FN`

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

Taking moments about the center of the axle

`F*0.02=3g*0.16`

`F=(3g*0.16)/0.02=235.2N`

The force is `F=235.2N`