Hey, I'm doing a research on artificial satellites, and I'm really confused about the escape velocity required for an artificial satellite to escape from the gravitational attraction of the Earth. I know that the equation for it is v^2 = 2GM/r , and with that, the rocket should launch at that speed, but it could go much slower spending much more fuel to escape from gravity right? arghh Wouldn't it be easier to calculate it with energy? Please help Pol. PS: Sorry for my english but I'm spanish u.u. I don't know where to post this thread, move it if it's necessary please.