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15 April, 21:22

A car moving west slows down from a velocity of 50 m/s to 20 m/s in 15 seconds. What is its acceleration?

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  1. 15 April, 23:47
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    Vf = Vo + at

    Vf = 20 m/s

    Vo = 50 m/s

    a = ?

    t = 15

    Therefore

    20 = 50 + 15a

    20 - 50 = 15a

    -30 = 15a

    a = - 30 / 15

    a = - 2 m/s²
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