1. The problem statement, all variables and given/known data Moving Proton in an Electric Field A proton with kinetic energy of 2.95 × 106 eV is fired perpendicular to the face of a large plate that has a uniform charge density of σ = +7.50 μC/m2. What is the magnitude of the force on the proton? How much work must the electric field do on the proton to bring it to rest? From what distance should the proton be fired so that it stops right at the surface of the plate? 3. The attempt at a solution I really have no idea how to do this one. No one in my class can seem to figure this one out.