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!

Speed of an electron

  1. Jan 18, 2010 #1
    1. The problem statement, all variables and given/known data

    An electron is released from rest in a weak electric field given by vector E = -3.00 10-10 N/C jhatbold. After the electron has traveled a vertical distance of 1.4 µm, what is its speed? (Do not neglect the gravitational force on the electron.)

    2. Relevant equations

    3. The attempt at a solution

    We haven't been taught this, so any help on how to do it would be wonderful.
  2. jcsd
  3. Jan 18, 2010 #2


    User Avatar
    Homework Helper

    What is the net force acting on the electron in the electric field?
    Work done = F*d = 1/2*m*v^2.
    From this find v.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook