1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Electric field strength and speed

  1. Feb 7, 2008 #1
    The electric field strength is 1.70×104 inside a parallel-plate capacitor with a 1.40 spacing. An electron is released from rest at the negative plate.

    What is the electron's speed when it reaches the positive plate?
    Help please...
  2. jcsd
  3. Feb 9, 2008 #2
    You need to combine Forces with Kinematics. We know that F = KE/r and also know that [tex](v_{f})^2 = (v_{i})^2 + 2ad[/tex] and of course, newton's second law: F = ma. You have everything you need, just use some basic algebra, and that's it.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook