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Simple projectile motion, yet stuck.

  1. Oct 30, 2012 #1
    1. The problem statement, all variables and given/known data
    A student threw a ball horizontally out a window 8.0m above the ground. It was caught by another student 10.0m away. What was the initial velocity of the ball?
    ANSWER PROVIDED: 7.16m/s

    2. Relevant equations
    dv=1/2at^2
    t=vv/a
    dh=vht

    3. The attempt at a solution
    dv=1/2at^2
    8=1/2(9.8)t^2
    √ans
    t=1.63sec

    The fact that I'm trying to find it's initial velocity causes my brain to become a blank slate when deciding on what my next step should be (if the first is even right).
     
  2. jcsd
  3. Oct 30, 2012 #2
    is the other student supposed to be at ground level or something? What's the height which the ball is caught?
     
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