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!

What is the electric potential energy of a proton

  1. Mar 25, 2013 #1
    1. The problem statement, all variables and given/known data

    What is the electric potential energy of a proton located 20.0 A (one angstrom or 1A is equal to 10^-10m) from another proton?

    2. Relevant equations
    Ep= F x d
    F= kq1q2/r^2


    3. The attempt at a solution

    Ep= Fxd
    F=kq1q2/r^2

    therefore Ep = (Kq1q2)(d)/r^2
    d=r
    so Ep= KQ1Q2/r

    (9x10^9)(1.60x10^-19)(1.60x10^-19)/(20x10^-10)
    = 1.152x10^-19J

    Help me check see if i got it right please!
     
  2. jcsd
  3. Mar 25, 2013 #2
    Your answer looks right :)
    It would be easier to directly use the formula for the potential energy rather than starting with the force equation.
     
  4. Mar 25, 2013 #3

    rude man

    User Avatar
    Homework Helper
    Gold Member

    I second the response.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted