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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

GMm12R

b

GMm3R

c

GMm8R

d

GMm6R

answer is A.

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Detailed Solution

Required energy =TE2−TE1=−GMm2(3R)−−GMm2(2R)=GMm12R

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