1. The problem statement, all variables and given/known data A proton is accelerated from rest at the positive plate of two charged parallel plates with a potential difference of 2000 v. After leaving the plates through a small hole in the negative plate, it enters a uniform magnetic field of 0.50 T in a direction perpendicular to the magnetic field directed out the page as shown in the diagram. Find the acceleration of the proton. https://drive.google.com/file/d/0B_FmHNxGrZAcN21ic0kwQ191alpram5qc0loclFhRFZTN3Yw/view?usp=sharing 2. Relevant equations a=v^2/2d 3. The attempt at a solution I tried to use the equation above but I don't have d and don't know how to find it. should I use f=ma?