28. Jack & Jill went up the hill to fetch a pail of water. At the well, Jill used a force of 20.0 N to turn the crank handle of radius 0.400 m to rotate the axle of radius 0.100 m, so she could raise the 60.0 N bucket of water. What is the efficiency of the wheel?
28. Jack & Jill went up the hill to fetch a pail of water. At the well, Jill used a force of 20.0 N to turn the crank handle of radius 0.400 m to rotate the axle of radius 0.100 m, so she could raise the 60.0 N bucket of water. What is the efficiency of the wheel?
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Transcribed Image Text:28. Jack & Jill went up the hill to fetch a pail of water. At the well, Jill used a force of
20.0 N to turn the crank handle of radius 0.400 m to rotate the axle of radius 0.100 m, so
she could raise the 60.0 N bucket of water. What is the efficiency of the wheel?
a. 50%
b.75%
c.100%
d.150%
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