A person carries a 25.0-N rock through the path shown in the figure, starting at point A and ending at point B. The total time from A to B is 1.50 min. How much work did gravity do on the rock between A and B?
A) 625 J
B) 20.0 J
C) 275 J
D) 75 J
E) 0 J

Question

A person carries a 25.0-N rock through the path shown in the figure, starting at point A and ending at point B. The total time from A to B is 1.50 min. How much work did gravity do on the rock between A and B? 
A) 625 J 
B) 20.0 J 
C) 275 J 
D) 75 J 
E) 0 J

Quizplus · Accepted Answer

Gravity does not do any work on the rock as the displacement of the rock is perpendicular to the force of gravity. Therefore, the work done by gravity is zero.

A Person Carries a 25