posted by Alex .
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?
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