Potential energy of a body at a height h is 100 J. If height is doubled, the potential energy becomes
A. 100 J
B. 200 J
C. 50 J
D. 400 J
Answer: Option B
Solution (By JKSSB Mock Tests)
PE = mgh, so directly proportional to height h. If h becomes 2h, PE becomes 2 × 100 = 200 J, assuming g constant. For large heights, g varies, but basic assumption. Thus 200 J.
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