Final answer:
The sprinter's acceleration is calculated by dividing the change in velocity by the time taken. With a final velocity of 11 m/s and a time of 2.8 seconds from rest, the acceleration is 3.93 m/s².
Step-by-step explanation:
To find the sprinter's acceleration, we use the following formula: a = (Δv)/(Δt). Where a is acceleration, Δv is the change in velocity, and Δt is the change in time. In this case, the sprinter accelerates from rest (initial velocity, vi = 0 m/s) to a final velocity (vf = 11 m/s) in 2.8 seconds. Using the formula: a = (vf - vi)/(Δt) = (11 m/s - 0 m/s)/(2.8 s) = 11 m/s / 2.8 s = 3.93 m/s². Therefore, the sprinter's acceleration is 3.93 m/s², which corresponds to option b) is the right answer.