Ch 13: Work, Energy and Power in Physics

About This Chapter

Use the video lessons in this chapter to understand the significance of work, energy and power. Study the types of energy, examples of work and how to determine the amount of power needed to perform an action.

Work, Energy and Power in Physics - Chapter Summary

This chapter's physics video lessons help you strengthen your knowledge of work, energy, power and their relationship to each other. You'll take a look at the definition of work and types of energy. Additionally, instructors cover variable forces, the mathematics behind power and applications of the work-energy theorem. After you've studied the lessons, you should be prepared to:

  • Describe energy's importance in nature
  • List the characteristics of work
  • Identify methods for calculating work done by variable forces
  • Define the work-energy theorem
  • Distinguish between kinetic and potential energy
  • Discuss the effects of conservative forces
  • Explain how mechanical energy is conserved
  • Calculate power

Typically taking less than 10 minutes of your time to watch, our video lessons are full of real-world examples and visuals to help you grasp these physics concepts. We also offer video tags so that you can rewatch key points as necessary. The lessons include transcripts and, in many cases, have links to other text lessons that have more information about important terminology. The self-assessment quizzes accompanying the lessons give you the opportunity to gauge your understanding of work, energy and power.

8 Lessons in Chapter 13: Work, Energy and Power in Physics
Test your knowledge with a 30-question chapter practice test
What is Energy? - Definition and Significance in Nature

1. What is Energy? - Definition and Significance in Nature

This lesson describes the nature of energy and how it is transferred from one source into another. Additionally, it will describe the significance of energy in natural systems.

Work: Definition, Characteristics, and Examples

2. Work: Definition, Characteristics, and Examples

Pushing a wall all day may feel like work, but unless you get that wall moving you're not doing any work according to the rules of physics. In this video lesson, you'll learn how work is defined as well as how to calculate the amount of work done on an object.

Work Done by a Variable Force

3. Work Done by a Variable Force

Doing work on an object is a simple concept: we apply a certain force over a certain distance. But in real life, that force is rarely constant. Therefore, we need to understand variable forces and be able to calculate them accurately.

Work-Energy Theorem: Definition and Application

4. Work-Energy Theorem: Definition and Application

Work and energy are closely related in physics. In this lesson, you'll learn what that relationship is as well as how we can apply it to various situations.

Kinetic Energy to Potential Energy: Relationship in Different Energy Types

5. Kinetic Energy to Potential Energy: Relationship in Different Energy Types

This video defines and describes kinetic and potential energy. You'll learn how different types of energy can be classified as potential and kinetic. You'll also find out how kinetic and potential energy are transformed.

Conservative Forces: Examples & Effects

6. Conservative Forces: Examples & Effects

Learn how to tell if a force is conservative and what exactly is being conserved. Then look at a couple of specific examples of forces to see how they are conservative.

Conservation of Mechanical Energy

7. Conservation of Mechanical Energy

Energy comes in many forms and for any system can never be created or destroyed. This holds true for mechanical energy, which also obeys this law of conservation of energy. In this video lesson, you'll explore how mechanical energy is converted or transferred between forms and objects.

Power: Definition and Mathematics

8. Power: Definition and Mathematics

Work involves moving an object with a force, but power tells us how quickly that work is done. In this lesson, you will learn about how power depends on both work and time as well as see examples of how to calculate power.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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