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