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Constant acceleration problem.

  1. Jan 27, 2017 #1
    1. The problem statement, all variables and given/known data
    "The fastest measured pitched baseball left the pitcher's hand at the speed of 45 m/s. If the pitcher was in contact with the ball over a distance of 1.50m and produced constant acceleration, (a) what acceleration did he give the ball, and (b) how much time did it take him to pitch it?"

    - I am doing this problem as part of my studying and I don't think that the textbook gives an answer to it. I am wondering if I did it correctly.... Thanks!

    - Assume one-dimensional motion.


    2. Relevant equations
    x is displacement (because my professor likes to use x for that).
    x = ((vi + vf) / 2)t
    a = (vf - vi) / t

    3. The attempt at a solution
    vf = 45 m/s
    v0 = 0 m/s
    x = 1.5m
    x = (45 + 0)/2 *t
    x = 22.5t
    1.5 / 22.5 = t
    t ≈ .067

    a = 45m/s / .067s
    a ≈ 671.642 m/s2
     
  2. jcsd
  3. Jan 27, 2017 #2
  4. Jan 27, 2017 #3
  5. Jan 27, 2017 #4
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