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

1.	Energy required to move a body of mass m from an orbit of radius 2R to 3R is..........
Answer» `(GMm)/(12R)` `(GMm)/(3R^2)` `(GMm)/(8R^2)` `(GMm)/(6R)` Solution :`IMPLIES U_1 =-(GM_em)/(2R)` `U_2 =-(GM_em)/(3R)` `:.` Change in potential energy `=U_2 -U_1` `(GMm)/(3R)-(-(GMm)/(2R))` `=(GMm)/R [((-2)+3)/6]` `=(GMm)/(6R)`

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