PART A A proton with kinetic energy of 2.30 × 106 eV is fired perpendicular to the face of a large plate that has a uniform charge density of ? = + ?C/m2. What is the magnitude of the force on the proton?
PART B How much work must the electric field do on the proton to bring it to rest?
PART C From what distance should the proton be fired so that it stops right at the surface of the plate?