Four small spheres of equal mass m, two with a charge +q, and two uncharged are connected by lightweight, nonconducting strings of length a as shown in the figure. The assembly is then placed on a horizontal, frictionless, nonconducting surface and the string between the two charged spheres is cut. Determine the maximum speed of the two uncharged spheres after the string is cut. (Use any variable or symbol stated above along with the following as necessary: ke. )