When a satellite is launched, its orbital radius is usually determined far in advance because the amount of energy required to change its orbit is large. How much work, W, would a rocket thruster on a satellite of mass = 620 kg need to do to change the satellite's orbital radius from r1 = 2.68×10^7 m to r2 = 4.21×10^7 m ? The Earth's radius is re= 6.37×10^6 m. Assume that both orbits are circular. 

Part B Part C 82 RE-