How to find the instantaneous velocity of a falling object

The video tutorial explains how to determine the velocity of a diver by setting a function equal to zero and using derivatives. It starts by establishing the initial conditions and defining velocity as the derivative of the position function. The tutorial then derives the velocity function V(T) and evaluates it at t=2 seconds, resulting in a velocity of -48 feet per second. The importance of using correct units and labels is emphasized throughout.

Calculate the velocity of the diver at 2 seconds.

What are the units for the velocity calculated in this problem?