An object with a mass of #4 kg# is hanging from an axle with a radius of #9 m#. If the wheel attached to the axle has a radius of #7 m#, how much force is needed to raise the object?

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Answer 1 · 2017-07-23T14:10:47

The force is #=50.4N#

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The load #L=(4g)N#

Radius of axle #r=9m#

Radius of wheel #R=7m#

Taking moments about the center of the axle

#F*R=L*r#

#F*7=4g*9#

#F=(4*g*9)/7=50.4N#

The force is #F=50.4N#