Initial speed of proton between parallel plate=?

AI Thread Summary
The discussion revolves around calculating the initial speed of a proton moving through parallel plates with a specified electric field. The setup includes a length of 5.5 cm and a distance of 0.3 cm between the plates, with the proton entering from the bottom left and exiting at the top right in a parabolic trajectory. The key consideration is that the proton experiences uniform acceleration due to the electric field, similar to projectile motion under gravity. The participant is uncertain about how to begin the calculations but recognizes the need to determine the time it takes for the proton to traverse the distance between the plates. Understanding these dynamics is essential for solving the problem accurately.
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Homework Statement



So I just wrote my midterm in physics, and I was curious on how to do the last question.

Parallel plates, length 5.5cm,
Distance between them is 0.3 cm
Electric Field (E) is 5.4x10^4

Asking what is the initial speed of a proton going through the parallel plates if it just misses the top plate when it comes out.
Proton enters plates on bottom left, comes out top right, and the path is parabolic almost.
So Initial speed?

I think these were all the values we were given.

Homework Equations



The Attempt at a Solution



Wasn't sure where to start.
 
Last edited:
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I assume the proton starts parallel to the plates.
Isn't this just like a projectile under gravity? There's a uniform field across the path of the proton, so a uniform acceleration in that direction. How long will it take to 'fall' from one plate to the other?
 
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