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Homework Help: Catapult vertical displacement problem

  1. Sep 13, 2011 #1

    ama

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    1. The problem statement, all variables and given/known data
    A catapult fires at an angle of 40.02 and has an initial velocity of 5.463. Find the vertical displacement at t=.38 seconds.
    I know the following from the problem and logic
    vo=5.463
    t=.3824
    g=9.8
    angle=40.02
    I calcuated the following
    voy=vosin40.02
    voy=3.5133

    2. Relevant equations
    y=(1/2)(-(g))(t^2)+(voy)(t)


    3. The attempt at a solution
    I know that the value for voy is valid. I plugged them into this equation and got y=.62696 meters. But it isn't the right answer. What do I do?
     
    Last edited: Sep 13, 2011
  2. jcsd
  3. Sep 13, 2011 #2

    kuruman

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    Science Advisor
    Homework Helper
    Gold Member

    We cannot help you unless you post the problem exactly as was given to you and include a detailed of what you did and what results you got.
     
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