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Question

# Energy required to move a body of mass m from an orbit of radius 2R to 3R is:GMm12R2GMm3R2GMm8RGMm6R

A
GMm3R2
B
GMm6R
C
GMm12R2
D
GMm8R
Solution
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#### Energy required=(Final potential-Initial potential)mEnergy required=−GMm3R−−GMm2R=GMm6R

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