An object with a mass of #3 kg# is hanging from an axle with a radius of #14 m#. If the wheel attached to the axle has a radius of #21 m#, how much force is needed to raise the object?

1 Answer
Apr 23, 2018

Answer:

The force is #=19.6N#

Explanation:

www.odicis.org

The load is #L=3gN#

The radius of the axle is #r=14m#

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=3g*14#

#F=(3g*14)/2=19.6N#

The force is #F=19.6N#