1. The problem statement, all variables and given/known data A person standing on the surface of a planet has a weight of 250 N. Suppose he goes to another planet that is the same size(volume) but twice the mass(more dense). What would his weight be on the second planet? 2. Relevant equations g=Gme/re2 3. The attempt at a solution Hopefully, it is logical to assume that the planets are approximate spheres. In the problem, it is stated that the volume for the two problems is equivalent. Since the volume formula for a sphere is 4/3∏*3r, we can assume that the radii are equivalent. G is a constant. Logic would seem to dictate that the answer is twice the force on the first planet, so the answer would be 1300. However, the answer just doesn't feel right. I can't place it, but it seems like the answer is too simple. Could someone please confirm my answer, or if it's wrong, tell me the problem? Thanks so much.