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A body of mass m is placed on earth surface which is taken from earth surface to a height of h = 3R, then change in gravitational potential energy is :

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a

mgR4

b

2mgR3

c

3mgR4

d

mgR2

answer is C.

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Detailed Solution

change in gravitational PE =−GMm4R−−GMmR=34GMmR=34mgR

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A body of mass m is placed on earth surface which is taken from earth surface to a height of h = 3R, then change in gravitational potential energy is :