Two capacitor plates are equally and oppositely charged. They are separated by 6.30 cm.
An electron is released from rest at the surface of the negative plate and, at the same time, a proton is released from rest at the surface of the positive plate.
Where do the electron and proton pass each other? Give your answer as a distance from the positive plate.
What is the angle of the electric field at the position indicated by the dot? Measure the angle cw from +x-axis.
Good heavens. Here's the general idea. The force on each is the same because the charge is the same. The mass of a proton, however is something like 1800 times the mass of an electron (you'll need to look up the exact figure). We know distance is 1/2at^2. Ans the difference between accelerations is 1800. You should wind up with something to the effect that 1801x = .063, where x is the distance the proton went and .063-x is the distance for the electron.
Hope that helps.