Chapter 18, Problem 45E

How much would you weigh if you were suddenly transported to the white dwarf Sirius B? You may use your own weight (or if don’t want to own up to what it is, assume you weigh 70 kg or 150 lb). In this case, assume that the companion to Sirius has a mass equal to that of the Sun and a radius equal to that of Earth. Remember Newton’s law of gravity:

   $F=G{M}_1{M}_2/R^2$

and that your weight is proportional to the force that you feel. What kind of star should you travel to if you want to lose weight (and not gain it)?