Question Detail
Question
A man carries a bucket of water horizontally at a constant velocity. What is the work done by the man's upward supporting force on the bucket?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The man exerts an upward vertical force to support the bucket. The displacement of the bucket is horizontal. Since the force is perpendicular (90°) to the displacement, the work done by this force is zero, because cos 90° = 0.
Hint
Check the angle between the direction of the supporting force and the direction of motion.