Question

Assume that a satellite executes perfectly circular orbits around a perfectly circular sphere. The work done by the satellite in 1 complete revolution is _____

(a) (1/2) x (G x m x M)/(R+h)

(b) – (G x m x M)/(R+h)

(c) – (1/2) x (G x m x M)/(R+h)

(d) 0

Answer 1

Correct choice is (d) 0

To explain: The net displacement of the satellite in one complete revolution is zero. Hence, the total work which is done by the satellite in one complete revolution also amounts to zero.

Work done = Force x Displacement.