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2D projectile problem

  1. Oct 24, 2009 #1
    1. The problem statement, all variables and given/known data
    A baseball is hit at a height of 1m with an initial velocity of 27 m/s at 32 degrees above the horizontal. A field player is located 50m from the home plate along the line of flight.

    (a) If he runs, is there a chance he could catch it? what's the velocity?
    Assume his reaction time is 0.5s, and that he would catch it at the initial level. MAIN ISSUE: (i don't know what he means by "initial level". initial level of the pitcher, or field player?)

    2. Relevant equations
    kinematics equations:
    Xf = Xi + ViT + 1/2at^2
    Vf^2 = Vi^2 + 2a(delta x)
    Vf = Vi + a(delta T)

    3. The attempt at a solution
    0 = 1 + 14.308T - 4.8T^2
    ....
    T = 2.99s
    66.86 = 50 + Vi(2.99s)
    ...
    basically, I got Vi as 7.57m/s instead of 7... maybe it has to do with the "initial position" that i didn't get?
     
    Last edited: Oct 24, 2009
  2. jcsd
  3. Oct 24, 2009 #2
    Initial level is simply the height from the ground at which the baseball is hit. Don't forget to take into account the fielder's reaction time.
     
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