Please explain find speed of each charge, when side of square becomes 2a. a m m a a m m a a concept-gravitational force is not included, only electrostatic forc

please explain Find speed of each charge, when side of square becomes 2a. a m m a a m m a a Concept-Gravitational Force is not included, only Electrostatic Force is considered. At starting all charges are at rest. a V=0 m ** V=0 m *** *** a a m m V=0 V-0 a