Energy required to transfer a 400 kg satellite in a circular orbit of radius 2 R to a circular orbit of radius 4 R, where R is the radius of the earth. [Given g = 9.8 ms–2, R = 6.4 × 106 m]
(a) 1.65 × 109 J
(b) 3.13 × 109 J
(c) 6.26 × 109 J
(d) 4.80 × 109 J
