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 = 1.50m. The bead with charge q1 is at the origin. as shown in figure p23.11, a third small, charged bead is free to slide on the rod. (a) at what position x is the third bead in equilibrium? (b) can the equilibrium be stable?

q1 q2
+O+ x
|<x-->|
|<d>|

thats what the picture looks like lol! The + sign is a ball with a positive sign in the middle. And the O is a ball and doesnt show a + or a -