(a) A 1.05 kg mass is at the center of a uniform spherical shell of mass 1.10 x 10^20 kg and radius 1.03 x 10^6 m. Find the resultant gravitational force on the mass.
(b) Find the resultant gravitational force on the mass if it is placed just outside the shell.
magnitude=
direction =
(c) Find the value of g just outside the shell.