Question

An object with a mass of `2 kg` is hanging from an axle with a radius of `7 m`. If the wheel attached to the axle has a radius of `14 m`, how much force is needed to raise the object?

Answer 1

The force is `=9.8N`

Explanation:

The load is `L=2gN`

The radius of the axle is `r=7m`

The radius of the wheel is `R=14m`

The effort is `=FN`

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

Taking moments about the center of the axle

`F*14=2g*7`

`F=(2g*7)/14=9.8N`

The force is `F=9.8N`