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!

Electric Potential and Kinetic Energy

  1. Jan 10, 2009 #1
    1. The problem statement, all variables and given/known data

    Two identical +9.5e-6C point charges are initially 3.5 cm from each other. If they are released at the same instant from rest, how fast will each be moving when they are very far from each other? Assume they have identical masses of 1.0mg.

    2. Relevant equations

    im not sure with this though but i used D(KE) + D(PE) = 0 where D=delta

    3. The attempt at a solution
    i used the above equation to solve for v. i kinda considered the problem by taking 1 point charge. however, i cant get the right answer...
  2. jcsd
  3. Jan 10, 2009 #2

    Doc Al

    User Avatar

    Staff: Mentor

    What do you mean by that?

    There are two point charges. Make sure you consider the total change in KE of both of them.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook