Answer : The impulse delivered to the ball is 138.75 N.s
Explanation :
Impulse : It is defined as the force applied to an object for a certain amount of time.
Formula used :

where,
I = impulse
F = force = 18500 N
t = time = 0.0075 s
Now put all the given values in the above formula, we get:


Therefore, the impulse delivered to the ball is 138.75 N.s