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Homework Help: Magnetic field question!

  1. Apr 11, 2009 #1
    1. The problem statement, all variables and given/known data
    An antiproton (same properties as a proton except that q=-e) is moving in the combined electric and magnetic fields of the figure

    The antiproton is moving to the right with a velocity of 500m/s the magnetic field B=2.5T is coming into the page and E=1000V/m downward.

    What is the magnitude of the antiproton's acceleration at this instant?

    2. Relevant equations

    F=ma, F=qvB

    3. The attempt at a solution

    The answer is 2.4x10^10m/s^2. I bascially went ma=qvB which didn't work. I'm not sure why it shows E.
  2. jcsd
  3. Apr 11, 2009 #2


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    Homework Helper

    Maybe this will help?
  4. Apr 11, 2009 #3
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