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Homework Help: Inelastic or elastic collision?

  1. Oct 9, 2006 #1
    A 4.0 kg firework is tossed onto a hockey rink. As it slides, it explodes into exactly two 2 kg pieces. There is an x-y coordinate system painted under the ice. One part of the exploded firework has velocity 3.0 m/s along the y direction. The other part has a velocity of 5.0 m/s at an angle of +30 degrees relative to the x-axis.
    (a) What is the original speed of the firework on the ice (before the explosion)

    My biggest question is that in order to solve this problem should I treat it as an inelastic collision or any collision for that matter? Since technically there is no collision, just an explosion.
     
  2. jcsd
  3. Oct 9, 2006 #2

    Doc Al

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    Staff: Mentor

    You need to decide what's conserved and what's not. What do you think?
     
  4. Oct 9, 2006 #3
    I was thinking it was elastic.
     
  5. Oct 9, 2006 #4
    seriously any help on this problem is appreciated.
     
  6. Oct 10, 2006 #5

    Doc Al

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    Staff: Mentor

    Answer my question: What's conserved and what's not conserved?
     
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