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Definite Integrals in Context

Sarah Miller

Sarah Miller

7 min read

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Study Guide Overview

This study guide covers the concepts of distance, displacement, speed, and velocity, emphasizing their differences. It explains how to calculate distance using integration of the absolute value of the velocity function. Key topics include understanding the impact of changing velocity signs, and using both speed and velocity in calculations. The guide includes a worked example and practice questions to solidify understanding. A glossary of terms is also provided.

Distance & Speed as Integrals

Table of Contents

  1. Introduction to Distance and Speed
  2. Distance vs. Displacement and Speed vs. Velocity
  3. Finding Distance Using Integration
  4. Impact of Speed vs. Velocity in Calculations
  5. Worked Example
  6. Practice Questions
  7. Glossary
  8. Summary and Key Takeaways

Introduction to Distance and Speed

Understanding the concepts of distance and speed is fundamental for solving problems in physics and calculus. These concepts are distinct from displacement and velocity, which are often confused by students. This guide will clarify these differences and explain how to use integration to find distances.

Distance vs. Displacement and Speed vs. Velocity

Definitions and Differences

  • Distance refers to the total length of the path traveled by an object, regardless of direction. It is a scalar quantity and always positive.
  • Displacement is a vector quantity that measures the change in position of an object. It has both magnitude and direction.
  • Speed is the magnitude of velocity. It is a scalar quantity and always positive.
  • Velocity is a vector quantity that describes the rate of change of position. It has both magnitude and direction.
**Example:** - Traveling **3 meters forwards** and **3 meters backwards** results in a **distance** of **6 meters**. - The **displacement** after this motion is **zero**. - Traveling at **10 meters per second forward** is a velocity of **+10 meters per second**. - Traveling at **10 meters per second backwards** is a velocity of **-10 meters per second**. - In both cases, the **speed** is **...

Question 1 of 7

You walk 5 meters forward and then 2 meters backward 🚶. What is the distance you traveled?

3 meters

7 meters

-3 meters

0 meters