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27 June, 23:09

You walk forward at 1.5 m/s for 8s. Your friend decides to walk faster and starts out at 2.0 m/s for the first 4 s. Then she slows down and walks forward at 1.0 m/s for the next 4s. Make a distance-time graph of your motion and your friend's motion. Who walked farther?

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  1. 27 June, 23:23
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    The first thing you should know is that the distance is equal to the speed per time.

    Therefore if You walk forward at 1.5 m / s for 8s

    d = 1.5t [0,8] s

    Your friend decides to walk faster and starts at 2.0 m / s for the first 4 s.

    d = 2t [0,4] s

    Then she slows down and walks forward at 1.0 m / s for the next 4s

    d = t + 4 [4,8] s

    Who walked farther?

    They both walked the same distance

    12 meters
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