Answer:
The correct answer is B.
Step-by-step explanation:
First, we must identify the data of the problem:
: Initial speed.
V: Final speed.
a: Acceleration.
t: Time.
Using the cinematic formula:
V =
+ a * t
We cleared the incognita a:
a =

Since the sprinter starts from rest, we consider
= 0
.
So when we replace the data in the equation we are left:
a =

a= 2

Have a nice day!