Aworld-class sprinter can reach a top speed (of about 11.8 m/s ) in the first 19.0 m of a race. what is the average acceleration of this sprinter

We use the kinematic equation of motion, to calculate the average acceleration

or          

Here, is initial speed , v is final speed  h is covered distance is initial position.

Given   , , and .

Substituting these values in above equation we get,

Thus, the average acceleration of the sprinter is .

490 n

f=125n a=2.5m/s2