An object with a mass of $2 kg$ is hanging from an axle with a radius of $7 m$ . If the wheel attached to the axle has a radius of $21 m$ , how much force is needed to raise the object?

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Answer 1 · 2017-11-13T18:58:52

The force is $F=6.53N$

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The load is $L=2gN$

The radius of the axle is $r=7m$

The radius of the wheel is $R=21m$

The effort is $=FN$

The acceleration due to gravity is $g=9.8ms^-2$

Taking moments about the center of the axle

$F*21=2g*7$

$F=2g*7/21=6.53N$

The force is $F=6.53N$

An object with a mass of 2 kg2 kg is hanging from an axle with a radius of 7 m7 m. If the wheel attached to the axle has a radius of 21 m21 m, how much force is needed to raise the object?