A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position.How much work did the gravitational force exerted by Earth on the object do on the bucket during this process?
A)180 J
B)90 J
C)45 J
D)0 J
E)900 J

Question

Quizplus · Accepted Answer

The gravitational force exerted by Earth on the object does not do any work since it acts perpendicular to the direction of motion of the object. Therefore, the work done by the gravitational force on the bucket is 0 J.

A 35-N Bucket of Water Is Lifted Vertically 3