An object's speed increases fourfold while its height stays fixed. What happens to its gravitational potential energy?

Question

An object's speed increases fourfold while its height stays fixed. What happens to its gravitational potential energy? — Exam MCQ

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A. It stays constant. — U = mgh depends on height, not speed, so it remains unchanged.

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B. It halves.

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C. It doubles.

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D. It becomes four times the original.