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Homework Help: Conservation of Momentum problem.

  1. Nov 4, 2012 #1
    1. The problem statement, all variables and given/known data
    Example 17.5.1 page 9 :

    I understand everything but one assumption that is made. " We can use this to determine the speed of the larger piece after the collision. Since the larger piece takes the same amount of time to return to the ground as the projectile originally takes to reach the top of the flight." Page 10

    I don't understand why the time the larger piece takes to get to the ground is the same as the previous peace.

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Nov 4, 2012 #2


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    Science Advisor
    Homework Helper

    Hi BareFootKing! :smile:
    Because both pieces have the same initial vertical speed (zero), and the same vertical acceleration. :wink:
  4. Nov 5, 2012 #3
    Thank you very much.
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