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Homework Help: Find the recoil velocity of the nucleus.

  1. May 16, 2008 #1
    1. The problem statement, all variables and given/known data
    An alpha particle is emitted from a stationary nucleus at [tex]1.8 \times 10^7 ms^{-1}[/tex].The mass of the particle is [tex]4u[/tex] and that of the nucleus is [tex]212u[/tex]. (u is a unit of mass equal to [tex]1.66 \times 10^{-27}kg[/tex].)
    (a) Find the recoil velocity of the nucleus.
    (b) Explain how you know the direction of movement.

    2. Relevant equations
    Momentum before collision = Momentum after collision

    3. The attempt at a solution
    What does recoil velocity mean?
  2. jcsd
  3. May 16, 2008 #2


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    Homework Helper

    Hi looi76,

    The recoil velocity of this nucleus is the velocity of the nucleus after the alpha particle is emitted. What do you get?
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