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Homework Help: Motion of Charged Particle in a Magnetic Field

  1. Oct 24, 2004 #1
    If the velocity is in the i direction (v=vi) and the magnetic field is in the -k direction (B=-kB), prove using Newtons Second Law that the trajectory of this charge must be circular? Please help this is really important.
     
  2. jcsd
  3. Oct 25, 2004 #2
    F = qv X B (X = cross product)

    F = ma

    So,

    qv X B = ma

    Solve that and think about your solution...don't lose track of your unit vectors....and think about what they mean, what they tell you....
     
    Last edited: Oct 25, 2004
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