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Homework Help: Electron velocity and unit vector notation

  1. Aug 2, 2008 #1
    1. The problem statement, all variables and given/known data
    An electron has an initial velocity with an x component of zero, a y component of 17.2 km/s, a z component 20.7 km/s, and a constant acceleration of 1.95 x 1012 m/s2 in the positive x direction in a region in which uniform electric and magnetic fields are present. If the magnetic field has a magnitude of 378 ┬ÁT and is in the positive x direction, find the (a)x, (b)y, and (c)z components of the electric field. Give your answers in V/m

    2. Relevant equations
    F = q(E + v x B) = ma
    E = (ma/q) + B x V

    3. The attempt at a solution
    E = [(9.11E-31 kg*1.95E12 m/s) / -1.60E-19 C] + (378 uT)i x [(17.2 km/s)j + (20.7 km/s)k]

    this may seem silly, but I can't remember how to solve for each x, y, and z component now...
  2. jcsd
  3. Aug 2, 2008 #2
    Last edited by a moderator: Apr 23, 2017
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