An object with a mass of $5 kg$ is hanging from an axle with a radius of $30 m$ . If the wheel attached to the axle has a radius of $9 m$ , how much force must be applied to the wheel to keep the object from falling?

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Answer 1 · 2017-06-18T09:46:39

The force is $=1.63N$

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The load $L=(5g)N$

Radius of axle $r=0.3m$

Radius of wheel $R=9m$

Taking moments about the center of the axle

$F*R=L*r$

$F*9=5*g*0.3$

$F=(5*g*0.3)/9=1.63N$

The force is $F=1.63N$

An object with a mass of 5 kg5 kg is hanging from an axle with a radius of 30 m30 m. If the wheel attached to the axle has a radius of 9 m9 m, how much force must be applied to the wheel to keep the object from falling?