A 50-Kg Satellite Circles the Earth in an Orbit with a Period

Multiple Choice

A 50-kg satellite circles the Earth in an orbit with a period of 120 min. What minimum energy is required to change the orbit to another circular orbit with a period of 180 min? (Earth: radius = 6.4 × 106 m, mass = 6.0 × 1024 kg)

A) 2.9 × 108 J
B) 3.5 × 108 J
C) 4.1 × 108 J
D) 4.7 × 108 J
E) 5.9 × 108 J