Answer:
Force, F = 38.66 N
Step-by-step explanation:
It is given that,
Mass of the baseball, m = 0.145 kg
Initial speed of the baseball, u = 0
Final speed of the baseball, v = 40 m/s
Distance covered, d = 3 m
Let a is the acceleration of the baseball. It can be calculated using the third equation of motion as :



Let F is the average force that a baseball pitcher's hand exerts on a baseball. Using the second equation of motion to find it :


F = 38.66 N
So, the average force a baseball pitcher's hand exerts on a baseball is 38.66 N. Hence, this is the required solution.