Answer:
The maximum acceleration experienced by the sprinter is
and it is experienced in the first phase when the sprinter starts his sprint.
Step-by-step explanation:
Since the sprinter attains a final speed of 34 km/h in runing 200 meters while starting from rest we have
Using the third equation of kinematics we have

where
v is the final speed
u is the initial speed
a is the acceleration
s is the distance covered
Since it is given that sprinter starts from rest thus u= 0 m/s and v= 34 km/h = 9.4m/s this speed is attained at s = 78 m
Applying values in the above equation we get

Since after that the sprinter moves at a constant velocity thus in that phase it's acceleration is

Now since the sprinter decelerates to 30 km/h or 8.33 m/s in final 63 meters thus the deceleration experienced is again found by third equation of kinematics as

Upon comparing the maximum acceleration experienced by the sprinter is
