The problem states: You will need to use the Momentum Principle to do the first part of this problem, and the Energy Principle to do the second part. A satellite of mass 4500 kg orbits the Earth in a circular orbit of radius of 9.2x10^6 m (this is above the Earth's atmosphere).The mass of the Earth is 6.0x10^24 kg. What is the speed of the satellite? What is the minimum amount of energy required to move the satellite from this orbit to a location very far away from the Earth? I'm not really sure what to do here, I feel as though I need more information to work this. Help is much appreciated.