Physics - Electrostatics Question with Solution | TestHub

Four point charges each of charge Q are rigidly fixed at the four vertices of insulating square plate A of mass m and on another square plate B of mass 2m four charges each charge Q are rigidly fixed at the four vertices of this insulating plate, these plates held together by four massless strings of same length as shown in figure. If all the strings burn simultaneously find the maximum speed achieved by plate B. (Neglect masses of point charges)