1. The problem statement, all variables and given/known data Two identical 25g particles each carry 5.0uC of charge. One is held fixed, and the other is placed 1.0mm away and released Find the speed of the moving charge when it's 1.0cm from the fixed charge 2. Relevant equations 3. The attempt at a solution I thought that using F=Q1Q2K/d^2 I could find the repelling force which is 2.25*10^5 N. then F=ma so a=2.25*10^5/0.025 =9*10^6m/s^2. then using kinematics v^2 =u^2+2as 0=u^2+2*9*10^6*0.009 the trouble is that that is unsolvable (imaginary solution) Its extremely possible that my procedure is entirely wrong, I was just making it up on the fly... Help!!!