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!

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


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

Similar Threads - Freight Caboose Collision Date
Conservation of momentum on relativistic collisions Sep 3, 2017
Photon-photon collision - pair creation Jun 2, 2017