1. The problem statement, all variables and given/known data I'm supposed to look for where the potential is zero on the same line where two different charges lie. I'm given the values of the two charges and the distance between them, I have to find where the potential is zero. 2. Relevant equations 3. The attempt at a solution I'm thinking about using the equation W = kQ1Q2 ( 1/d1 - 1/d2) I tried plugging in for Q1 and Q2 and the given distance into either d1 or d2. Where's my mistake? Or I'm supposed to use another equation? Also, is the W the same as the required "potential?"