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Speed of particles

  1. May 17, 2009 #1
    1. The problem statement, all variables and given/known data
    The problem is at
    http://dl.getdropbox.com/u/175564/physicsSpeedParticles.JPG [Broken]


    2. Relevant equations
    The following equations may be useful
    E = .5 mc^2
    E = Bev

    3. The attempt at a solution

    The right answer is (a).
    However, I am unsure how it is obtained.

    For example, by comparing the energies of the two particles, we get only
    (v1 / v2)^2 = (E1 / E2) * 2/167

    where the energies are unknown.
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. May 17, 2009 #2

    rl.bhat

    User Avatar
    Homework Helper

    Consider the conservation of linear momentum.
     
  4. May 17, 2009 #3
    I get the following equation
    v1 / v2 = (p1 / p2) * (234 / 4)

    I assume that the momentum of the alpha particle equals that of the original particle.

    This gives us the right answer

    v1 / v2 = (234 / 4)
    = 58.5

    Thank you for your answer!
     
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