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Throwing a ball upward on top of a building, find height of building

  1. Sep 20, 2009 #1
    1. The problem statement, all variables and given/known data
    Please help me with this problem:
    Rock is thrown straight up with a velocity of 24 m/s from the edge of a building. The rock is moving at 43 m/s when it strikes the ground. Acceleration is 9.8 m/s^2. How tall is the building?



    I know it involves the equations of motion. I think the first step is solving for the time with the quadriatic eq.
    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Sep 20, 2009 #2
    Figure out the time, then the displacement. Two different equations. You dont need to solve a quadratic equation.
     
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