Two men, Joel and Jerry, push against a car that has stalled, trying unsuccessfully to get it moving. Jerry stops after 10 min, while Joel is able to push for 5.0 min longer. Compare the work they do on
The car.
A) Joel does 25 % more work than Jerry.
B) Jerry does 50 % more work than Joel.
C) Joel does 50 % more work than Jerry.
D) Joel does 75 % more work than Jerry.
E) Neither of them does any work.

Question

Two men, Joel and Jerry, push against a car that has stalled, trying unsuccessfully to get it moving. Jerry stops after 10 min, while Joel is able to push for 5.0 min longer. Compare the work they do on
The car. 
A) Joel does  25 %  more work than Jerry.
B) Jerry does  50 %  more work than Joel.
C) Joel does  50 %  more work than Jerry.
D) Joel does  75 %  more work than Jerry.
E) Neither of them does any work.

Quizplus · Accepted Answer

Work is defined as the force applied to an object times the distance that the object moves in the direction of the force. Since the car does not move, the distance is zero, and therefore, the work done by both Joel and Jerry is zero, regardless of how long they push.

Two Men, Joel and Jerry, Push Against a Car That