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Homework Help: Electron problem

  1. Dec 20, 2003 #1
    Problem 14.
    An electron moving through an electric field experiences an acceleration of 6 : 00 * 10^3 m/s^2.
    Find the magnitude of the electric force acting on the electron. In units of N.
    Note: I used force=mass* acceleration with mass=9.109*10^-19 and the acceleration =6 : 00 * 10^3 m/s^2 and got 5.4654*10^-27 N but it was wrong, what did I do wrong?




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  2. jcsd
  3. Dec 20, 2003 #2

    ShawnD

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    [tex]F = ma[/tex]

    [tex]F = (9.11x10^-^3^1)(6x10^3)[/tex]

    [tex]F = 5.466x10^-^2^7[/tex] N

    Where did you get that mass from? What does 6:00 mean? If you used that mass you gave, how did you get that answer?
     
    Last edited: Dec 21, 2003
  4. Dec 21, 2003 #3
    Answer

    this is how it was solved:
    F_electric=m_e*a
    =(9.109*10^-31)(6.9832*10^6)
    =6.361*10^-24N.
     
  5. Dec 21, 2003 #4

    ShawnD

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    Where the heck does 6.9832x10^6 come from???
     
  6. Dec 21, 2003 #5
    Mustang:

    Your answer is correct if the acceleration is 6 x 10^3.

    The other answer is correct if the acceleration is 6.9832 x 10^6.

    Pick one.

    (I assume your 9.109x10^-19 was just a typo.)
     
    Last edited: Dec 21, 2003
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