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Homework Help: Projectile Motion

  1. Sep 28, 2009 #1
    Suppose the water at the top of Niagara Falls has horizontal speed of 3.59m/s just before it cascades over the edge of the falls. At what vertical distance below the edge does the velocity vector of the water point downward at a 64.1 degree angel below the horizontal?

    From this information I got
    So i need to figure otu Voy can i do 3.59sin (64)??
    And then what formula do I need to use??
  2. jcsd
  3. Sep 28, 2009 #2


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    Homework Helper

    Here Vox remains constant. Voy = 0.
    At a certain depth velocity is Vy.
    Then Vy/Vox = tanθ. Find Vy and the depth.
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