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    Q1) The best throwers in the world are baseball pitchers. They can release a ball travelling at a speed of 40 m/s. In doing so, they accelerate the baseball through a distance of 3.6m. Calculate:

    a) the average speed of the ball during the throw.
    b) the time during which the ball is being accelerated.
    c) the average acceleration of the baseball.

    Answers:

    a) 20 m/s.
    b) 0.18s
    c) 220 m/s^2
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    (assuming constant acceleration)

    a) average speed = (initial speed + final speed)/2 = 40/2 = 20 m/s

    b) time = distance/average speed = 3.6/20 = 0.18 s

    c) (from s=ut+at²/2) acceleration = 2* distance/time² = 2*3.6/0.18² = 220 m/s² (2sf)
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