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Model that against time speed and gravity

  1. Nov 14, 2008 #1
    1. The problem statement, all variables and given/known data
    against time speed gravity


    2. Relevant equations

    no

    3. The attempt at a solution

    to slow down the marble reach bottom

    model saiz is 300x300 height is 700
     
  2. jcsd
  3. Nov 14, 2008 #2

    HallsofIvy

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    Staff Emeritus
    Science Advisor

    That makes no sense at all. Please state as clearly as you can what the problem is.
     
  4. Nov 16, 2008 #3
    a ball run project but have to make the longest time reach bottom
     
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