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18 May, 02:13

When Maggie applies the brakes of her car, the car slows uniformly from 15.3 m/s to 0 m/s in 2.23 s. How far ahead of a stop sign must she apply her brakes in order to stop at the sign? Answer in units of m

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  1. 18 May, 02:38
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    The answer is 34.119m

    Explanation:

    You need to pay attention to the word "uniformly". It means there is no acceleration thus the physics of this problem respond to the uniform rectilinear motion equations:

    Xf = Xo + vt v = constant a = 0

    where:

    Xf = Final position Xo = Origin position v = velocity (speed) t = time a = acceleration

    Xf = 0 + (15.3) (2.23)

    Xf = 34.119m
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