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Homework Help: Projectile Motion - baseball popup

  1. Jun 19, 2012 #1
    Projectile Motion -- baseball popup

    1. The problem statement, all variables and given/known data
    A baseball is popped up, remaining aloft for 6.3 s before being caught at a horizontal distance of 83 m from the starting point. What was the launch angle?

    2. Relevant equations
    vx = vcostheta
    vy = vcostheta

    3. The attempt at a solution
    I tried solving for vx and vy then take those and find the arctan but then there was an erroron my caclculator. Besides, I think I'm doing something wrong.
  2. jcsd
  3. Jun 19, 2012 #2
    Re: Projectile Motion

    Vx= V*CosQ
    t= 2*Vy/g=6.3 =>Vy=30.87 m/s
    Range= Vx*t=83m => Vx=13.17 m/s
    Vy/Vx=TanQ=66 Degrees
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