An object with a mass of #200 kg# is hanging from an axle with a radius of #8 cm#. If the wheel attached to the axle has a radius of #32 cm#, how much work would it take to turn the wheel a length equal to the circumference of the axle?

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Answer 1 · 2017-05-10T06:03:27

The work is #=246.3J#

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The load L=(200g)N#

Radius of axle #r=0.08m#

Radius of wheel #R=0.32m#

Taking moments about the center of the axle

#F*R=L*r#

#F*0.32=200*g*0.08#

#F=(200*g*0.08)/0.32=490N#

The work done is

#W=Fd#

The distance is #d=2*pi*0.08=0.16pim#

Work is

#W=490*0.16pi=246.3J#