The document discusses position, velocity, and acceleration functions. It provides an example position function for an object falling from a cliff. It uses the position function to calculate the object's position at different times and finds the time when it hits the ground. The document then discusses how to calculate average velocity over time intervals using the position function. It also explains that the velocity function is the derivative of the position function and discusses an example of using the derivative to find a diver's velocity when hitting the water from a diving board.