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Homework Help: Kinematics Problem on a tower

  1. Mar 1, 2010 #1
    1. The problem statement, all variables and given/known data

    An object is dropped from a tower. if it had been thrown down at 60m/s, it would have taken half the time. What is the height of the tower? (Use gravity as 10m/s2)

    Givens
    Acceleration = 10m/s2
    v1 = 0m/s (not sure)
    v2 = 60m/s
    time = t/2

    2. Relevant equations

    d=v1*t+(1/2)*a*t2

    3. The attempt at a solution

    I tried doing the questions, but i don't understand.

    The correct answer is 320m, but i don't know how to get to it.

    Any help is appreciated.

    Thanks
     
  2. jcsd
  3. Mar 1, 2010 #2
    Well, how much time does it take for an object at rest to fall and how much time does it take for an object thrown down to fall?
     
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