question

Discussion in 'Physics' started by braddy, Sep 11, 2005.

  1. braddy

    Thread Starter Well-Known Member

    Dec 29, 2004
    83
    0
    Hi ,
    I have troulbe with the second question of this problem.

    A softball picher pitches a ball at 65 mph.
    The distance from the pitcher's mound to home plate is 43ft, but the pitcher realeases the ball about 41 ft from the home plate.
    a- How long does it takes for the ball to reach home plate? (I found it t=.43s)
    b-A Good pitcher can make the ball curve left about 6 inches over the pitch distance. If this is due to a constant acceleration, what is its magnitude and which direction does it act?

    need some suggestions.

    Thank you

    braddy
     
  2. GnatWest

    New Member

    Apr 24, 2004
    4
    0
    Im used to metric so Im not sure if my conversion is correct.

    I will be working with feet and seconds


    first 65mph = 95.33 fps (google)

    a) The equation we will be using is d=vt. In this problem we have d and v. Solving for t we get t= d/v or t= 45/95.33.

    t= 0.45s

    B) for this problem we use d= 1/2at^2, we have d= 1/2 feed and t= 0.45s
    solving for a gives us a= 2d/t^2

    a= 4.93 f/s^2 to the left
     
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