Gravitation Question 133

Question: Energy required to move a body of mass m from an orbit of radius 2R to 3R is[AIEEE 2002]

Options:

A) [GMm/12R2]

B) [GMm/3R2]

C) [GMm/8R]

D) [GMm/6R]

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Answer:

Correct Answer: D

Solution:

Change in potential energy in displacing a body from [r1] to [r2] is given by [ΔU=GMm,[1r11r2]=GMm,(12R13R)=GMm6R]



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