Course: Calculus II
Topic: Geometry
Subtopic: Net Change


Before delving into displacement, net change, and future position, it would be good to review Motion and the Derivative from Calculus I where we discussed position, velocity, and acceleration functions and how one is the derivative of another. In this section we build on those concepts and introduce a new(ish) interpretation of the integral. The net change of a function is the definite integral of its rate of change, basically the Fundamental Theorem of Calculus (FTC) in action.


By the end of this topic you should know and be prepared to be tested on:


Review: position, velocity, speed, acceleration

Terms you should be able to define: displacement, distance traveled, net change, future value, future position

TIP: Consider relationships between displacement and total distance versus net and total change versus velocity and speed.

Displacement: net change in position = integral of velocity

Distance traveled: total change in position = integral of speed

Text Notes

When studying section 6.1 of Calculus, Early Transcendentals (3rd ed) text by Briggs/Cochran/etc., please note this connection between FTC and three theorems. Important to understand!

Mini-Lectures and Examples

STUDY: Applications - Velocity and Net Change

Supplemental Resources (recommended)

Video: Org. Chem Tutor's Net Change Theorem, Definite Integral, & Rates of Change Word Problems

There are two videos from Univ. of Austin Texas recommended in Mini-Lecture: applications of the net change theorem post in WAMAP, along with a part of the "Blood Flow" tutorial video that accompanies our textbook. That post includes some added explaination worth checking out.

rev. 2021-01-05