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Homework Help: Electron near nucleus

  1. Jan 20, 2009 #1
    1. The problem statement, all variables and given/known data
    What is the magnitude of the electric field at a distance of 5.00 ×10−10 m from a radon nucleus?
    =4.95×1011 N/C
    What is the magnitude of the force on an electron at that distance?
    =7.94×10-8 N
    Now here is where I am getting stuck..
    Treating the electron classically, that is, as a point object that can move around the nucleus at reasonably slow speeds, what is the period of the electron's motion? &
    Again treating the electron classically, how fast it it moving?

    2. Relevant equations
    f=mr omega^2

    3. The attempt at a solution

    i tried solving for omega by plugging in the force, radius and mass of radon. then square rooting the answer. so ill have omega and then i take 2 pi over it right? for the period.. thats not working.
    then i tried solving for the velocity by taking the force * radius / mass then square rooting that as well to find the velocity and that is wrong...

    i dont know where i am going wrong.. any help would be great.

  2. jcsd
  3. Jan 20, 2009 #2
  4. Jan 20, 2009 #3
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