1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted