Question

10. The energy required to move a satellite of mass m from an orbit of radius
2R TO 3R around earth of mass M is
(a)GMm/12R (b) GMm/R (c) GMm/SR (d)GMm/2R​

Answer 1

Answer:GmM/6r

Explanation: potential energy change is stored as total energy as their is no change in kinitic energy

{(P.E) final- (P.E)initial} = dU which is stored as total energy {P.E + K.E} =total energy

{-Gm1m2/r} final— {-Gm1m2/r}initial

{-GmM/3r} final— {-GMm/2r}initial

So solving above

GMm/6r =dU