Q: When a stone tied to a string is whirled in a circle, the work done on it by the string:
(a)is positive.
(b)is negative.
(c)is zero.
(d)depends on the mass of the stone.
Correct Answer: (c)
The correct answer is (c): शून्य है।. Subject: Indian Economy | Sub-topic: General Note: This answer was determined through AI-based research. Verify against the official answer key when available.