1. The problem statement, all variables and given/known data A 9.0x10^3kg satellite with an orbital radius of 3.20x10^7m orbits the Earth at an altitude of 2.56x10^7m. What is the orbital period? 2. Relevant equations ΣFc = mac Kepler's third law equation 3. The attempt at a solution For this question I know that it is asking me to find the orbital period, but it has also given me an altitude and mass for the satellite. Are they there just to through me off because you are supposed to use Kepler's third law equation to find the orbital period? Or are they important and I am supposed to use the equation: Fg = 4(pie)^2r/T^2 Basically what I am wondering is which equation do we use?