A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position.How much work did gravity 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

Gravity did not do any work on the bucket during this process because the net displacement of the bucket is 0. The work done is equal to the force applied multiplied by the displacement in the direction of the force, and in this case, the force is gravity and the displacement is 0. Therefore, the work done by gravity is 0 J.

A 35-N Bucket of Water Is Lifted Vertically 3