00:34 Hint given | 01:17 Solution starts | 08:10 Using COM | 11:34 Answer
Question ES1L3: Concepts used in solution
Electric field inside sphere | Spherical coordinates | Center of mass
Elemental volume in spherical coordinate system
Problem statement
What is the net force on the northern hemisphere due to the southern hemisphere of a uniformly charged solid sphere of radius R and the total charge Q? Could this problem be solved using the position of the center of mass of the hemisphere?
Fun with Physics Problems 