An object with a mass of #3 kg# is hanging from an axle with a radius of #2 m#. If the wheel attached to the axle has a radius of #12 m#, how much force is needed to raise the object?

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Answer 1 · 2017-06-27T06:10:07

The force is #=4.9N#

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The load #L=(3g)N#

Radius of axle #r=2m#

Radius of wheel #R=12m#

Taking moments about the center of the axle

#F*R=L*r#

#F*12=3*g*2#

#F=(3*g*2)/12=1/2g=4.9N#

The force is #F=4.9N#