If g is the acceleration due to gravity on the earth's surface, the gain 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
A
2mgR
B
21mgR
C
41mgR
D
mgR
Medium
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Updated on : 2022-09-05
Solution
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Correct option is B)
Gravitational potential
energy on the earth surface, Ur=R−GMm
Gravitational potential
energy at a height h above the earth's
surface, Uh=R+h−GMm