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Homework Help: Momentum collision problem

  1. Feb 27, 2010 #1
    1. The problem statement, all variables and given/known data
    Two 72.0 kg hockey players skating at 5.45 m/s collide and stick together. If the angle between their initial directions was 115[tex]^{o}[/tex], what is their speed after the collision?


    2. Relevant equations
    p = mv
    [tex]p_{i} = p_{f}[/tex]


    3. The attempt at a solution

    [tex]p_{ix} = p_{fx} = 0[/tex]

    [tex]p_{iy} = p_{fy}[/tex]

    [tex]m_{A}v_{A} + m_{B}v_{B} = (m_{AB})(v_{AB})[/tex]

    [tex](72)(5.45cos(32.5)) + (72)(5.45cos(32.5)) = 144v_{AB}[/tex]

    [tex]v_{AB} = 4.60 m/s[/tex]

    Am I correct?
     
  2. jcsd
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