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Q.

Energy required to move a body of mass m from an orbit of radius 2R to 3R is

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a

GMm​/​12R2

b

GMm​/​3R2

c

GMm​/​8R

d

GMm​/​6R

answer is D.

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Detailed Solution

Change in potential energy in displacing a body from r1 to r2 is given by ΔU=GMm 1r1−1r2=GMm 12R−13R=GMm6R
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