If you weigh 670 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 15.0 km ?

Question

Take the mass of the sun to be ms = 1.99×1030 kg , the gravitational constant to be G = 6.67×10−11 N⋅m2/kg2 , and the acceleration due to gravity at the earth's surface to be g = 9.810 m/s2 .

Answer 1

m = 670/g = 670/9.81 = 68.3 kg

F = G m Ms/(r^2)
F=6.67*10^-11*68.3*1.99*10^30/7500^2