An object with a mass of #15 kg# is hanging from an axle with a radius of #30 m#. If the wheel attached to the axle has a radius of #9 m#, how much force must be applied to the wheel to keep the object from falling?

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Answer 1 · 2018-01-08T15:16:54

The force is #=490N#

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The load is #L=15gN#

The radius of the axle is #r=30m#

The radius of the wheel is #R=9m#

The effort is #=FN#

The acceleration due to gravity is #g=9.8ms^-2#

Taking moments about the center of the axle

#F*9=15g*30#

#F=(15g*30)/9=490N#

The force is #F=490N#