1. The problem statement, all variables and given/known data So I just wrote my midterm in physics, and I was curious on how to do the last question. Parallel plates, length 5.5cm, Distance between them is 0.3 cm Electric Field (E) is 5.4x10^4 Asking what is the initial speed of a proton going through the parallel plates if it just misses the top plate when it comes out. Proton enters plates on bottom left, comes out top right, and the path is parabolic almost. So Initial speed? I think these were all the values we were given. 2. Relevant equations 3. The attempt at a solution Wasn't sure where to start.