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24 May, 02:15

During a neighborhood baseball game in a vacant lot, a particularly wild hit sends a 0.147 kg baseball crashing through the pane of a second-floor window in a nearby building. The ball strikes the glass at 14.3 m/s, shatters the glass as it passes through, and leaves the window at 10.1 m/s with no change of direction. What is the direction of the impulse that the glass imparts to the baseball? Calculate the magnitude of this impulse (a positive number).

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  1. 24 May, 04:20
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    A) The direction of impulse is the opposite direction to the velocity direction of travel of the baseball.

    B) Magnitude of Impulse = 0.6175 N. s

    Explanation:

    A) From the question we see that there is no change in direction and thus the impulse will be in exactly the opposite direction to the velocity direction of travel of the baseball.

    B) From momentum and impulse we know that;

    Impulse = change in momentum

    Thus, impulse = (V2-V1) m

    So;

    (10.1 - 14.3) m/s x 0.147 kg = - 0.6175N. s

    (The negative sign indicates an opposite direction to that of the velocity)

    Thus, the magnitude of the impulse is 0.6175 N. s
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