If g is the acceleration due to gravity on the earth’s surface, the change in the potential energy of an object of mass m raised from the surface of the earth to a height equal to the radius R of the earth is

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mgR/2

2mgR

mgR

-mgR

answer is A.

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Detailed Solution

ug=−GM1M2R⇒uf−ui=−GMm2R−GMmRΔu=GMm2R=mgR2g=GMR2

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