1. Not finding help here? Sign up for a free 30min 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!

Acceleration of an electron held at 1m from the nucleus of an Uranium atom.

  1. May 7, 2012 #1
    1. The problem statement, all variables and given/known data

    An electron is held fixed at a distance of 1 m from the nucleus of a uranium atom (Z = 92). If the electron is then released, what is the magnitude of its initial acceleration?


    2. Relevant equations

    I am not sure which kinematic equation that I should use.

    3. The attempt at a solution

    This is the only problem on my physics final review that I do not know how to do. I know that the answer is 23,300 m/s^2, but I do not know how to get this answer. I would really love it if someone could explain how to solve this to me.
     
  2. jcsd
  3. May 7, 2012 #2

    Doc Al

    User Avatar

    Staff: Mentor

    This is a dynamics problem, not a kinematics one. Hint: What force acts on the electron?
     
  4. May 7, 2012 #3
    I was thinking the strong nuclear force, but I believe at 1m it is too far for that to have an effect. The only other thing I could think of would be gravity?
     
  5. May 7, 2012 #4

    Doc Al

    User Avatar

    Staff: Mentor

    Neither of those forces would be significant. What other force acts?
     
  6. May 7, 2012 #5
    The only other thing I could think of would be Coulomb's law. This is the only problem out of 100 that I just have no clue about. I keep rereading my notes but can't seem to find out what I'm missing on.

    Thanks for the help though, I appreciate you trying to lead me to the answer.
     
  7. May 7, 2012 #6

    Doc Al

    User Avatar

    Staff: Mentor

    That's the one.

    The positively charged nucleus attracts the electron with an electrical force given by Coulomb's law. Figure out that force.
     
  8. May 7, 2012 #7
    Thanks! Here, it was an incredibly easy problem.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Acceleration of an electron held at 1m from the nucleus of an Uranium atom.
  1. Atomic Nucleus (Replies: 10)

Loading...