An object with a mass of $15 kg$ 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 · 2018-01-08T15:16:54

The force is $=490N$

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The load is $L=15gN$

The radius of the axle is $r=30m$

The radius of the wheel is $R=9m$

The effort is $=FN$

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

Taking moments about the center of the axle

$F*9=15g*30$

$F=(15g*30)/9=490N$

The force is $F=490N$

An object with a mass of 15 kg15 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?