Compute all parts of given question:
Question: A proton starts from rest halfway between the two plates of a vacuum-filled parallel-plate capacitor; the plates are 10cm apart. The capacitor has capacitance= 2.67E-6 F, a charge of 0.02C on the positive plate and a charge of -0.02C on the negative plate. (Ignore gravity or electric field fringing).
Part A: What is the magnitude of the change in potential energy as the proton moves away from its initial position and exits the capacitor?
Part B: What is the change in kinetic energy of the proton as it moves from its initial position and exits the capacitor?
Part C: What is the velocity of the proton as it exits the capacitor?
I am having a hard time understanding these questions. So if you answer please explain how you found the answers.