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24 December, 17:04

In lacrosse, a ball is thrown from a net on the end of a stick by rotating the stick and forearm about the elbow. If the angular velocity of the ball about the elbow joint is 30.3 rad/s30.3 rad/s and the ball is 1.35 m1.35 m from the elbow joint, what is the velocity? v of the ball?

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  1. 24 December, 20:44
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    40.91 m/s

    Explanation:

    w = angular velocity of the ball about the elbow joint = 30.3 rad/s

    r = radius of circular turn = distance of the ball from the elbow joint = 1.35 m

    v = linear velocity of the ball

    Linear velocity of the ball is given as

    v = r w

    Inserting the values given above in the equation

    v = (1.35) (30.3)

    v = 40.91 m/s
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