Find the average acceleration of a ball falling

The video tutorial explains the concepts of velocity and acceleration in the context of calculus. It begins by defining velocity as the change in position over time, represented by the derivative H prime of T. The tutorial then introduces acceleration as the change in velocity over time, which is the second derivative. The instructor uses examples to calculate average acceleration, emphasizing the importance of understanding the change in velocity over specific time intervals.

Explain how the change in velocity is calculated based on the provided example.

What was the final result for the average acceleration in the example given?