Figure P23.13

Homework 23.13

Two small beads having positive charges q1 = 3q and q2 = q are fixed at the opposite ends of a horizontal insulating rod of length d = 1.50 m. The bead with charge q1 is at the origin. As shown in Figure P23.13, a third small bead is free to slide on the rod.
  1. At what position x is the third bead in equilibrium?
  2. Can equilibrium be stable?