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Homework Help: Hang time, range, maximum height

  1. Oct 22, 2008 #1
    1. The problem statement, all variables and given/known data
    Find the ball's hang time, range, and maximum height.
    A player kicks a football from ground level with an initial velocity of 27.0 m/s, 60.0° above the horizontal. Find the ball's hang time, range, and maximum height. Assume air resistance is negligible.


    2. Relevant equations
    Range = Initial Velocity ^ 2 /9.8
    Height = (Initial Velocity)(Sin)^2/ (2)(9.8)


    3. The attempt at a solution

    I'm not sure if these equations are correct.
     
  2. jcsd
  3. Oct 23, 2008 #2

    alphysicist

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    Hi itsmarasilly,

    This does not look right; it is missing a trig factor. Do you see what this formula needs to be?

    This is not correct (although you might just have a typo in your equation). In particular, what is being squared here?
     
  4. Oct 23, 2008 #3
    the 60 degrees? would it be put in the calculator as sin(60^2) or sin(60)^2, does it make a difference?
     
  5. Oct 23, 2008 #4

    LowlyPion

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    The vertical component of your velocity is 27 * Sin 60. That's what you square.
     
  6. Oct 23, 2008 #5

    alphysicist

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