If ?g? is the acceleration due to gravity on the earth's surface, the – McqOptions

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1.	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.	\[\frac{1}{4}mgr\]
B.	\[\frac{1}{2}mgr\]
C.	\[2\,mgr\]
D.	\[mgr\]
Answer» C. \[2\,mgr\]

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