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    Jwong7312 Posts: 1, Reputation: 1
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    Sep 12, 2012, 04:01 PM
    A railroad worker
    A railroad worker realizes that a car on a slope does not have its brakes set and
    will roll down. He runs to the car to set the brakes. At t = 0 , when he is at
    distance x0 behind the car, it starts to roll, accelerating at constant rate 2 m/s2 .
    He is running at constant speed 4 m/s .
    What is the largest value of x0 that will allow him to catch the rolling car?

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