An object with a mass of 3 kg is hanging from an axle with a radius of 9 cm. If the wheel attached to the axle has a radius of 27 cm, how much force must be applied to the wheel to keep the object from falling?

1 Answer
Jul 23, 2017

The force is =9.8N

Explanation:

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The load L=(3g)N

Radius of axle r=0.09m

Radius of wheel R=0.27m

Taking moments about the center of the axle

F*R=L*r

F*0.27=3g*0.09

F=(3*g*0.09)/0.27=9.8N

The force is F=9.8N