Question

A sprinter explodes out of the starting block with an acceleration of +2.3m/s^2, which she sustains for 1.2s

A sprinter explodes out of the starting block with an acceleration of +2.3m/s^2, which she sustains for 1.2s. Then her velocity drops to 0 for the rest of the race. What is her velocity at t=1.2 and at the end of the race?

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