1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    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!

Homework Help: Collisions problem?

  1. Aug 11, 2010 #1
    1. The problem statement, all variables and given/known data

    [PLAIN]http://img834.imageshack.us/img834/8045/questuinfunny.jpg [Broken]

    3. The attempt at a solution

    [PLAIN]http://img824.imageshack.us/img824/3619/funnyquestion.jpg [Broken]
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Aug 11, 2010 #2
    Tell me why you think you can assume that each piece gets the same amount of energy?
     
  4. Aug 11, 2010 #3
    Im not going to lie. I guessed. Wish to give me a better idea of how to tackle this?
     
  5. Aug 11, 2010 #4
    What is the definition of an elastic collision?
     
  6. Aug 12, 2010 #5
    Ah...

    so what I have done is conserves ALL of the kinetic energy!! This lets me set up some simultaneous equestions with the momentum and all the kinetic energy conserved.

    This gives me: v1 = 254.4m/s

    and v2 =46.2 m/s.

    does this seem correct (i havnt got the answer!) i can post all the workings if that helps.
     
  7. Aug 12, 2010 #6
    Go ahead and post the work.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook