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Homework Help: What is the change in kinetic energy of the proton?

  1. Jul 7, 2003 #1


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    A proton moves .1m along hte direction of an electric field of magnitude 3V/m. what iss the change in kinetic energy of the proton?

    I have KE = qE/d...1.6x10^-27 * 3V/m /(.1^2)= 4.8x 10^-25 but got it wrong on the test.
    What did i do wrong?
    Last edited by a moderator: Feb 5, 2013
  2. jcsd
  3. Jul 7, 2003 #2

    Tom Mattson

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    Re: capacitance

    Note: In the formula, distance is not squared, which is correct.

    You squared the distance, which is incorrect.
  4. Jul 7, 2003 #3


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    Darn it! I missed that on my test, stupid math mistakes gets me all the time. Thanks Tom!
    Dx :wink:
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