A sprinter explodes out of the starting block with anacceleration of +3.6 m/s 2

Question

A sprinter explodes out of the starting block with anacceleration of +3.6 m/s2, which she sustains for1.3 s. Then, her acceleration drops tozero for the rest of the race. a. What is her velocity at t = 1.3 s.
m/s
b. What is her velocity at the end of the race?
m/s Help help me figure this out! Will rate lifesaver!
A sprinter explodes out of the starting block with anacceleration of +3.6 m/s2, which she sustains for1.3 s. Then, her acceleration drops tozero for the rest of the race. a. What is her velocity at t = 1.3 s.
m/s
b. What is her velocity at the end of the race?
m/s Help help me figure this out! Will rate lifesaver!

Explanation / Answer

use the equations of motion: a=3.6 v=3.6*t v(1.3)=3.6*1.3=4.68 m/s since her acceleration drops to zero after that, her velocity staysthe same throughout the race.

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