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 $F=4.9N$

An object with a mass of 3 kg3 kg is hanging from an axle with a radius of 2 m2 m. If the wheel attached to the axle has a radius of 12 m12 m, how much force is needed to raise the object?