An object with a mass of 7kg is hanging from an axle with a radius of 25cm. If the wheel attached to the axle has a radius of 75cm, how much work would it take to turn the wheel a length equal to the circumference of the axle?

1 Answer
Mar 29, 2017

The work done is =35.92J

Explanation:

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The load =(7g)N

Radius of axle r=0.25m

Radius of wheel R=0.75m

Taking moments about the center of the axle

F0.75=7g0.25

F=7g0.250.75=73g=22.87N

The distance is =2π0.25=0.5π

The work done is

W=Fd=22.870.5π=35.92J