Derive an equation for the velocity around Earth. Satellite has no mass. Radius not given. Only period, G, and ME (earth) G = 6.67X10^-11 nm^2/kg^2 | Earth = 5.98x10^24 kg | Period = T = 1.20x10^4s I know I can find radius, and then find velocity. But I am supposed to derive an equation to suit the given information. 2. Relevant equations V = √GM/r V = 2πr / T 3. The attempt at a solution I'm not positive about my ability to cut r from the equations and merge them?