An object with a mass of #6 kg# is hanging from an axle with a radius of #7 m#. If the wheel attached to the axle has a radius of #28 m#, how much force must be applied to the wheel to keep the object from falling?

1 Answer
Sep 21, 2017

Answer:

The force is #=14.7N#

Explanation:

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The load is #L=6gN#

The radius of the axle is #r=7m#

The radius of the wheel is #R=28m#

The effort is #=FN#

Taking moments about the center of the axle

#F*28=6g*7#

Plugging in the value of #g=9.8ms^-2#

#F=6g*7/28=14.7N#

The force is #F=14.7N#