Electrostatics

Coulomb's Law

Problem Solving Sessions

Problem Solving Session # 1 Two identical pith balls are charged by rubbing against each other. They are suspended from a horizontal rod through two strings of length 'l'each, the separation between the suspension points being 'd'. In equilibrium, the separation between the balls is 'r'. Find the mass of each ball and the tension in the strings. The charge on each ball has a magnitude 'q'.