Energy required in moving a body of mass m from a distance 2R to 3R from centre of earth of mass M is

Energy required in moving a body of mass m from a distance 2R to 3R fr

1.	Energy required in moving a body of mass m from a distance 2R to 3R from centre of earth of mass M is
Answer» `(GMM)/(12 R^(2))` `(GMm)/(3R^(2))` `(GMm)/(8R)` `(GMm)/(4R)` Solution :Change in potential energy in DISPLACING a body from `r_(1)` to `r_(2)` is GIVEN by `DeltaU=GMm[(1)/(r_(1))-(1)/(r_(2))]=GMm((1)/(2R)-(1)/(4R))=(GMm)/(4R)`