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Yesterday, 22:40

A truck covers 40.0 m in 8.50 s while smoothly slowing down to a final speed of 2.80 m/s. (a) find its original speed. (b) find its acceleration.

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  1. Today, 02:04
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    Speed equation: speed = total distance/total time

    speed = 40.0m / 8.50s

    speed = 4.71 m/s

    acceleration equation: acceleration = change in velocity/time

    4.71 - 2.80 = 1.91 (change in velocity)

    acceleration = 1.91/8.50

    acceleration =.22 m/s^2

    a) 4.71 m/s

    b).22 m/s^2
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