An object with a mass of #8 kg# is hanging from an axle with a radius of #27 m#. If the wheel attached to the axle has a radius of #21 m#, how much force must be applied to the wheel to keep the object from falling?

1 Answer
Nov 22, 2017

Answer:

The force is #=100.8N#

Explanation:

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The load is #L=8gN#

The radius of the axle is #r=27m#

The radius of the wheel is #R=21m#

The effort is #=FN#

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

Taking moments about the center of the axle

#F*21=8g*27#

#F=8g*27/21=N#

The force is #F=100.8N#