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Homework Help: Kinematics in 2d

  1. Feb 3, 2005 #1
    HELP!!!! i dont undersatnd any of it..

    like say a canon fires a ball a groiund level at 30deg above the horiz. and the initial speed is 112.7m/s. Whas the max height and the range of the proectile??

    None of this is making sense to me...
  2. jcsd
  3. Feb 3, 2005 #2


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    Homework Helper

    Sketch a picture of the situation.
    Then decompose the initial velocity into its horizontal and vertical components.
    Since only gravity is accelerating the particle downwards, the horizontal component has uniform velocity. The vertical component is in freefall.
    So you can setup up the value of x and y as a function of t.
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