An object with a mass of #6 kg# is hanging from an axle with a radius of #6 m#. If the wheel attached to the axle has a radius of #48 m#, how much force must be applied to the wheel to keep the object from falling?

1 Answer
Narad T.
Nov 9, 2016

The force is #=7.5N#

Explanation:

This is a statics problem.
To keep the object from falling, the moment about the center of the axle mus be balanced.
Let the force be #F#
Then the moments are
#6g*6=F*48#
#:. F=6g*6/48=7.5 N#

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