Your friend observes an artificial satellite orbiting the earth. He estimates it is at an altitude h = 938 km above the earth's surface and has a mass m = 3500 kg. He wishes to show it off to his other friends. He asks you to help him calculate when the satellite will be back in the same position. From the second law of motion and the gravitational force law, calculate the following:
(a) What is the satellite's velocity? (m/s)
(b) What is the period (s) of the satellite's motion?