A body of mass m is taken from Earth's surface to a height equal to twice Earth's radius. Change in potential energy is MCQ with Answer and Explanation

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A body of mass m is taken from Earth's surface to a height equal to twice Earth's radius. Change in potential energy is

A. mgR/3

B. 3mgR

C. mgR

D. 2mgR/3

Answer: Option D

Solution (By JKSSB Mock Tests)

ΔU = GMm (1/R - 1/(R+2R)) = GMm (1/R - 1/3R) = (2/3)GMm/R = (2/3)mgR.

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