Space Station V has a mass of 5.2 x 106 kg. For this problem assume the entire mass is in the "wheels" and don't consider the "spokes" or the central part. The diameter is 300 m. If two of SpaceX's second stage Falcon 9 rockets were attached and run at full thrust, 934 kN each, how long would they need to fire in s to reach the space station's period of 61 s from rest