NEET 2026 (Phase 1) · PhysicsWork donePrevious Year Question
The work done to raise a mass m from the surface of the earth to a height h equal to the radius of the earth R is:
- A.mgR
- B.2mgR
- C.½mgR✓
- D.(3/2)mgR
Correct Answer
(C) ½mgR
Solution & Explanation
Correct Answer (C): ½mgR Solution: W = U(2R) − U(R) = −GMm/2R + GMm/R = GMm/2R. Using GM = gR²: W = mgR/2.
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