1. The problem statement, all variables and given/known data The mass of a hypothetical planet is 1/100 that of Earth and its radius is 1/4 that of Earth. If a person weighs 150 lb on earth, what would he weigh on this planet 2. Relevant equations I think F = G*m1*m2 / r^2 3. The attempt at a solution I believe F = 150lbs (im not sure) So in that problem do i do G (Me/100)(Me)/ (Re/4)^2 no im not doign something right. I really wish my professor would have covered this.