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Homework Help: Balloon of a Building

  1. Sep 17, 2010 #1
    1. The problem statement, all variables and given/known data
    you and your friend throw balloons filled with water of a roof of a building. You drop yours from rest, he throws his with an initial speed of 72.52 m/s^2 3.7 seconds later. They hit at the same time. How high his the building.

    2. Relevant equations
    (V^2) - (Vi^2)/(2a)= deltax

    3. The attempt at a solution
    V=72.52 = 9.81(3.7), V = 108.78
    (108.78)^2 - (72.52)^2/(2)(9.81) = deltax
    deltax = 334.73 m
  2. jcsd
  3. Sep 17, 2010 #2
    seems to me that you have to set up two equations, one for the v0 = 0 at time T and one for v0 = 72.52 m/s at time = (T - 3.7). that's my take...I haven't tried plugging these in, though.
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