A rocket is used to place a synchronous satellite in orbit about the earth. What is the speed of the satellite in orbit? I know that G= 6.67x10^-11 and the Mass of earth is 5.98x10^24 kg. So I'm to assume that I use the equation v= Square root of([G*M]/radius) But I don't know how high off the ground the satellite is. I know the radius of the earth is 6.38X10^6 m, so I'd add that to how high above the earth it is to get the radius. Thanks for your time!