Taking a practice ASVAB test and this one has stumped me. HELP!!
14: The gain in kinetic energy if a 400-kilogram satellite moves from a distance of 3 × 106 meters above the surface of the Earth to a point 1.50 × 106 meters above the surface is _______ J. The mass of the Earth is 5.98 × 1024 kilograms and the radius of the Earth is 6.37x106 meters.
I don't even know where to start on this one. I'd appreciate some guidance. Thanks