In the 200meter race

Micheal accelerates at

1.5 seconds. Find out

the time taken that

Micheal increased his

velocity from 2 meters/s to

9 meters/s.

-Average acceleration is (v2-v1) / (t2-t1). And we are told that he has constant acceleration of 1.5. Since acceleration is constant, constant=average. So:

a = (v2-v1) / (t2-t1) which in this case is:

(9-2) / t=1.5

7=1.5t

t=14/3 seconds

t = 4 2/3 seconds