Three spheres, each have a charge of 3.00 μC, are arranged in a line, with sphere 2 in the middle. Adjacent spheres are initially 6.50 centimeter apart. The spheres have masses m1=20 gram, m2=85 gram, and m3=20 gram, and their radii are much smaller than their separation. The three spheres are released from rest.
Find the speed of each sphere when they are far apart?