A student of weight 830 N was sent to another planet called Nerdland. If Nerdland has a mass that is three times the mass of the earth and a radius that is half the radius of the earth, what would be the mass in kg of the student when on Nerdland?

Answer 1

The change in Wt. that you experience when on a different planet is not caused by a change in your mass. Your
mass is constant. The change in wt. is
caused by the change in gravity(g).