Neverside

Physics Problem

Hey guys,

I'm stuck on a problem, any help would be greatly appreciated.

An electron has an initial velocity of 2.5 E 6 m/s [45 degrees up from horizontal). It is in between two parallel plates (negative plate on top, positve on bottom). The plates are separated by 3mm. The potential difference between the plates is 100V.

How close does the electron come to the top of the plate?

Thanks again

Take Archimedes' constant and multiply it by the square of the radius of the electron.

___________________

"Hey, **** YOU!"

Thanks.

Would it be possible to have an explaination?

lol, I'm just kidding. That just another way of saying pi*r^2

___________________

"Hey, **** YOU!"

I would find the force acting on the electron by the plates, then treat it as a basic kinematic problem (treat the force as gravity). When the electron's vertical component of velocity reaches zero from the deceleration, it's at its max height.

___________________

LOL Stevie I didn't even catch that.

Thanks Riah. That was the first thing I tried, but I wasn't sure if my force was right.

Electric Field Strength = delta Voltage / d
= 100/0.003

I have two questions about that though:
1. Am I plugging in the correct values, even though the electron starts in the middle of the two plates? (Sorry, I think I forgot to mention that when I posted the question.)
2. Is that field strength constant for all points in the electric field between the two plates?

Thanks!