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7 December, 15:39

A (n) 0.155 kg baseball is thrown with a speed of 18.4 m/s. It is hit straight back at the pitcher with a final speed of 18.4 m/s. What is the magnitude of the impulse delivered to the ball? Answer in units of kg · m/s.

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  1. 7 December, 17:14
    0
    5.704kg. m/s toward the pitcher

    Explanation:

    Impulse (Ft) = change in momentum

    Impulse = m (v-u)

    m=0.155 kg, v=18.4 m/s, u=18.4m/s

    impulse=0.155[ - (18.4) - (18.4) ]

    = 0.155 (-36.8)

    = - 5.704 kg. m/s

    the negative means towards the pitcher
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