physics

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A runner covers one lap of a circular track 40.0 m in diameter in 62.5 s. Suppose initially the runner starts by going in the north direction.
Assume the speed is constant for the first half-lap and then constant for the 2nd half-lap. Suppose instead the runner ran these same speeds and distances in a straight line (rather than turning around the track). Sketch the position vs. time graph for this situation.

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