Two very light1
neutral metal spheres (A and B) hanging from insulating string are at rest
touching each other. An insulated, positively charged rod is brought in contact with A (on the side
opposite from B) and then removed. (Assume the spheres do not move because of the normal force
between the rod and sphere, nor do the spheres move before the rod touches A.) How do the spheres
move? Explain.
