An object with a mass of #3 kg# is hanging from an axle with a radius of #9 cm#. If the wheel attached to the axle has a radius of #27 cm#, how much force must be applied to the wheel to keep the object from falling?

1 Answer
Jul 23, 2017

Answer:

The force is #=9.8N#

Explanation:

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The load #L=(3g)N#

Radius of axle #r=0.09m#

Radius of wheel #R=0.27m#

Taking moments about the center of the axle

#F*R=L*r#

#F*0.27=3g*0.09#

#F=(3*g*0.09)/0.27=9.8N#

The force is #F=9.8N#