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Homework Help: Head-on collision HELP

  1. Mar 31, 2009 #1
    Head-on collision HELP!!

    1. The problem statement, all variables and given/known data

    Consider a head-on collision between two objects. Object 1, which has mass m1, is initially in motion, and collides head-on with object 2, which has mass m2, and is initially at rest. Which of the following statements about the collision are true?

    A. |P1,final| < |P1,initial|
    B. If m2 >> m1, then |P1| > |P2| (last P's have deltas representing the change in P)
    C. If m2 >> m1, then the final speed of object 1 is greater than the final speed of object 2.
    D. If m1 >> m2, then the final speed of object 2 is less than the initial speed of object 1.
    E. P1,initial = P1,final + P2,final

    There can be more than one answer.

    i not sure what kind of collision this is (inelastic or elastic) i assumed elastic and got

    not sure if this is right and only have one more attempt so want to make sure i understand what is going on. any help would be great!!!!
  2. jcsd
  3. Mar 31, 2009 #2
    Re: Head-on collision HELP!!

    i just tried it and the computer says they are wrong?
    you have any idea why?
    i guess i have one more attempt (thought the last one was my last attempt but i guess not)
    here is everything i have tried (4 attempts)
    1. ALL A B C D E
    2. A B D
    3. A B D E
    4. A B C E
  4. Mar 31, 2009 #3


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    Homework Helper

    Re: Head-on collision HELP!!

    D is also correct.
  5. Mar 31, 2009 #4
    Re: Head-on collision HELP!!

    so are you saying that they all are correct?
    I already tired that (attempt #1)
    that is what made sence to me, but still said i was wrong??
  6. Mar 31, 2009 #5
    Re: Head-on collision HELP!!

    got the answer it is only
    A. C. E.
    i guess it is an elastic collision
    thanks for the help
  7. Apr 1, 2009 #6
    Re: Head-on collision HELP!!

  8. Apr 1, 2009 #7
    Re: Head-on collision HELP!!

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