Question

An object with a mass of `2 kg` is hanging from an axle with a radius of `2 cm`. If the wheel attached to the axle has a radius of `16 cm`, how much work would it take to turn the wheel a length equal to the circumference of the axle?

Answer 1

The work done is `=2.46J`

Explanation:

Mass `=2kg`

Radius of axle `=0.02m`

Radius of wheel `=0.16m`

Cicumference of axle `=2pir=2*0.02*pi=0.126m`

Work done `=mgh=2*9.8*0.126=2.46J`