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Help with introductory Physics (I keep getting different answers)

  1. Feb 29, 2012 #1
    Hey guys,

    Im fairly new to this, but I got this question,

    "Q1.A firefighter is 20m away from a burning building. She directs the fire hose at an angle of 30 degrees above the horizontal and the water has an initial speed of 30 m/s. At what height does the water hit the building?"


    I tried to solve the equation using vectors, but each time i got a different answer, the ones being 9,5,20,3 and freakishly, 0m. Im stuck beyond belief :/ Anyone know what the answer would be? even though i know it sounds stupid to ask.
     
  2. jcsd
  3. Feb 29, 2012 #2
    How did you manage to get different answers if you were doing the same thing?
     
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