1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Potential difference and electron speed

  1. Sep 10, 2008 #1
    1. The problem statement, all variables and given/known data

    Through what potential difference would an electron need to be accelerated for it to achieve a speed of 5.8% of the speed of light (2.99792x10^8 m/s), starting from rest?

    2. Relevant equations


    3. The attempt at a solution



    V=(.5 * 9.10939e-3 kg * 1.73879e7^2 m/s) / 1.60218e-19 C

    V=8.59493e30 V
  2. jcsd
  3. Sep 10, 2008 #2


    User Avatar
    Homework Helper

    Hi Kris1120,

    The electron mass you are using is incorrect.
  4. Sep 11, 2008 #3
    OMG what a silly mistake! Thank you so much!
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook