An object with a mass of #4 kg# is hanging from an axle with a radius of #5 m#. If the wheel attached to the axle has a radius of #18 m#, how much force is needed to raise the object?

1 Answer
Aug 21, 2017

Answer:

The force is #F=10.89N#

Explanation:

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The load is #L=4gN#

The radius of the axle is #r=5m#

The radius of the wheel is #R=18m#

The effort is #=FN#

Taking moments about the center of the axle

#F*18=4g*5#

#F=4g*5/18=N#

The force is #F=10.89N#