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28 December, 03:52

The gravitational force exerted on a baseball is 2.21 N down, a pitcher throws the ball horizontally with velocity 18.0 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 170 ms. the ball starts from rest. Through what distance does it move before its release? what are the magnitude and direction of the force of the pitcher exerts on the ball?

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  1. 28 December, 06:17
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    To have a weight of 2.21N., the ball's mass is (2.21/9.8) =.226kg.

    a) d = 1/2 (vt), = 1/2 (18 x. 17), = 1.53m.

    b) Acceleration of the ball = (v/t), = 18/.17, = 105.88m/sec^2.

    f = (ma), =.226 x 105.88, = 23.92N.
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