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Homework Help: Freight Car-Caboose Collision

  1. Jan 11, 2010 #1
    Freight Car-Caboose Collision

    Hi, i'm a new user here. i need a help with this question:

    A 29000-kg railroad freight car collides with a stationary caboose car. They couple together, and 25 percent of the initial kinetic energy is dissipated as heat, sound, vibrations, and so on. What is the mass of the caboose?
     
  2. jcsd
  3. Jan 11, 2010 #2

    tiny-tim

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    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi alaajassar! Welcome to PF! :wink:

    Call the initial velocity u, and the final velocity v, and use conservation of momentum.

    What do you get? :smile:
     
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