1. The problem statement, all variables and given/known data Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. The radius of the earth is 6.37 x 106m, and the altitude of a geosynchronous orbit is 3.58 x 107m. What are (a) the speed and (b) the magnitude of the acceleration of a satellite in a geosynchronous orbit? 2. Relevant equations M (mass of the earth) = 5.98 x 1024 G (gravitational constant) = 6.67 x10-11 GMm = mv2 r2........ r 3. The attempt at a solution I understand the problem and how to get the answer. I just do not understand where the units go on the above formula and where it is derived from.