1. The problem statement, all variables and given/known data What velocity is required to escape from the Earth-Moon system from the surface of the Moon? Assume that all of the necessary velocity is imparted at once, as with a cannon or rail gun on the Moon itself. In what direction must the initial velocity vector be pointed to ensure the lowest escape velocity? 3. The attempt at a solution Would i just find the center of mass between earth and the moon and then use the distance from the center of mass to the surface of the moon to find the escape velocity.