1. The problem statement, all variables and given/known data A uniform electric field of magnitude 678 N/C exists between two parallel plates that are 4.02 cm apart. A proton is released from the positive plate at the same instant that an electron is released from the negative plate. Determine the distance from the positive plate at which the two pass each other. (Ignore the electrical attraction between the proton and electron.) 2. Relevant equations no relevant questions I can think of. 3. The attempt at a solution Honestly I'm not even sure how to approach this question in terms of acceleration and velocity of these masses due to an electric field. I dont want somebody to do my homework for me, I just need some guidance of what equations to use and how to set them up. Any help would be appreciated. Thanks!