An object with a mass of #3 kg# is hanging from an axle with a radius of #9 m#. If the wheel attached to the axle has a radius of #12 m#, how much force is needed to raise the object?

1 Answer
Sep 10, 2017

Answer:

The force is greater than #=22.05N#

Explanation:

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The load is #L=3gN#

The radius of the axle is #r=9m#

The radius of the wheel is #R=12m#

The effort is #=FN#

Taking moments about the center of the axle

#F*12=3g*9#

#F=3g*9/12=22.05N#

The force is #F=22.05N#