An object with a mass of #3 kg# is hanging from an axle with a radius of #6 cm#. If the wheel attached to the axle has a radius of #9 cm#, how much force must be applied to the wheel to keep the object from falling?

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Answer 1 · 2017-09-09T06:12:10

The force is #=19.6N#

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The load is #L=3gN#

The radius of the axle is #r=0.06m#

The radius of the wheel is #R=0.09m#

The effort is #=FN#

Taking moments about the center of the axle

#F*0.09=3g*0.06#

#F=3g*0.06/0.09=19.6N#

The force is #F=19.6N#