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A sprinter explodes out of the starting block with an acceleration of + 2.02 m/s2, which she sustains for 1.12 s. Then, her acceleration drops to zero for the rest of the race. What is her velocity at (a)t = 1.12 s and (b) at the end of the race?

  • physics -

    Constant velocity attained = 2.02*1.12 = 2.26 m/s

    That will be her velocity at the end of the race also.

    That is a very slow speed for a sprinter. Champions run about four times faster

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