. A 50 kg satellite circles the earth in an orbit - with a period of 290 min. | ~ What minimum energy F is required to - change the orbit to one with a period of 900 min? Assume both the initial and f. nal orbits are circular. The Earth's radius 15 6.37 X 10 m, its mass is 5.98 x 10% kg, and the value of the universal gravitational constant is 6.672 x 1011 N . .1.1.'12/kg2.. Answer in units of J