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How do I set up these problems?

  1. Sep 20, 2009 #1
    1. The problem statement, all variables and given/known data

    In a football game a ball is punted from an initial height of 0.75 m and at an angle of 41° above the horizontal. If the ball travels a horizontal distance of 38 yd before hitting the ground, what was its initial speed? (Neglect air resistance.)


    2. Relevant equations

    I cannot find any information in my text book relating to problems that have and starting point (y) that is not 0. What formula do I use on these problems? Thanks

    3. The attempt at a solution
     
  2. jcsd
  3. Sep 20, 2009 #2

    rock.freak667

    User Avatar
    Homework Helper

    y=y0+v0t -1/2 gt2


    use this where y0 is the initial height.

    EDIT: this may help as well

    v2=u2-2g(y-y0)
     
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