1. The problem statement, all variables and given/known data a 5.00 x 10^2 kg satelilite is in circular orbit 2.00 x 10^2 km above earth's surface. calculate a) gravitaional potential energy which i got, which is -3.13 x 10^10 J b) kinetic energy of the satellite c) binding energy of satellite d) the percentage increase in launching energy required for the satellite to escape earth 2. Relevant equations 2GM/c^2 Eg = - GMem/re 3. The attempt at a solution v = sqroot GM/r for the velocity then using the equation 1/2mv^2 to get the Ek, but i dont know how to get the radius so i can plug it into the Ek equation.