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2 December, 01:10

A 0.12-kg ball is moving at 6 m/s when it is hit by a bat, causing it to reverse direction and have a speed of 14 m/s. What is the magnitude of the change in the momentum of the ball

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  1. 2 December, 04:53
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    2.4 kg m/s

    Explanation:

    For change in momentum we have to find out initial and final momentum,

    So, change in momentum = final momentum - initial momentum

    As momentum is vector so we have to take the direction also

    Final momentum = 0.12 kg * 14 m/s = 1.68 kg m/s

    Initial momentum = - 0.12 kg * 6 m/s = - 0.72 kg m/s

    (Negative sign is due to change in direction)

    So, change in momentum = 1.68kg m/s - ( - 0.72 kg m/s)

    = (1.68 + 0.72) kg m/s

    = 2.4 kg m/s
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