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Homework Help: Help calculating linear speed of an electron?

  1. Mar 7, 2009 #1
    According to the Bohr Model of the Hydrogen Atom, the elctron orbits the proton a ta radius of 5.29x10-11m.
    (a) What is the linear speed of the electron?
    (b) What is the angular speed of the electron?
    (c) How long does it take for the electron to complete one orbit?

    I know how to solve for parts b and c, but do not know how to answer a, and thus can't solve the other two parts.

    For part a, I have the the net force acting upon the electron is equal to mVt2/r. What exactly is the net force on the electron? Is it Fe or Fg or both?

    I calculated Fe earlier and attained a value of 0.00816 N.
  2. jcsd
  3. Mar 7, 2009 #2


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    I would assume the electric force of attraction between the proton and electron in hydrogen would provide the centripetal force of the electron.
  4. Mar 15, 2009 #3
    Yeah, you're right. Thank you. I realized that the Fg would be negligible in this case.
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