1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution My reasoning is that when the charge stops that means that the force of friction equals the electric force. So I find the distance by setting the two equations equal to each other and solve for x which gives (keq1q2/(mgk))^(1/2), however what about the initial distance that they were set at? Do I add it to this value or subtract it or is it already included within the value of x that I solved for? Any help would be greatly appreciated. Thanks!