1. The problem statement, all variables and given/known data How much would a 1 kg mass weigh on the surface of a very dense planet with the same mass as Earth, but 1/2 Earth's radius? 2. Relevant equations Eg(universe) = -G[(m1m2)/d^2] Earth's Radius = 3,959 mi Earth's mass = 5.97E24 kg 3. The attempt at a solution If I plugged in those number into the universe gravitational energy equation along with the 1kg mass, will I get the answer in Newtons as the weight on that planet? Because of the negative sign in front of that equation, the answer would be in negative? Is that possible?