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The velocity of a diver just before hitting the water is -8.7 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 0.89 s of the dive?


    0.89 s earlier, her speed was less by
    9.8 m/s^2*0.89 s = 8.72 m/s.

    That means it was zero then.

    The distance she covered in the last 0.89 s was the total distance,
    Vaverage*0.89 s = 3.9 meters

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