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A runner beginning from x0 at t0 accelerates at a constant

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Question: A runner, beginning from x=0 at t=0, accelerates at a constant rate for 7 seconds and reaches a speed of 7m/sec. The runner then decreases her speed at a rate of 2m/sec2 for 2 seconds and maintains that speed until she reaches x=200m. Find t200, the time at which the runner reaches x=200m.

Reference no: EM13590385

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