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13 August, 20:21

car slows down from 20 m/s to rest in a distance of 85 m. What was its acceleration, assumed constant?

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  1. 13 August, 20:23
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    Let's assume that x = the acceleration

    x = (vf² - vi²) / (2d)

    x = (0 - 23²) / (170)

    x = - 3.1 m/s²
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