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Relativistic collisions

  1. Mar 8, 2015 #1
    1. The problem statement, all variables and given/known data

    We have a particle mass ##m## with kinetic energy ##k## colliding with a stationary particle of mass ##2m##. The collision creates a composite mass of ##\sqrt{17}m##. Find the value of ##k##

    2. Relevant equations


    3. The attempt at a solution

    I have tried using mass-energy conservation and also momentum conservation, but I can't seem to get the required result of ##k=2mc^2##
     
  2. jcsd
  3. Mar 8, 2015 #2

    vela

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    Please show your work. Simply generically describing what you tried unsuccessfully isn't helpful at all.
     
  4. Mar 8, 2015 #3
    My apologies. Fairly new round here... I've figured it out now, but many thanks anyways
     
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