About This Chapter
Work, Energy & Power Overview - Chapter Summary
Feel confident that you fully understand the principles of power, work and energy in physics by taking advantage of the informative lessons in this self-paced chapter. Developed by top instructors, these lessons review concepts that include mass-energy conversion, energy conservation, Newton's Law of Restitution and the work-energy theorem. Review them at your leisure to enhance your ability to:
- Define and describe the application of the work-energy theorem
- Describe and calculate variable forces
- Share details about the conversion or transfer of mechanical energy between forms and objects
- Explain the meaning and identify types of energy
- Discuss mass defect, nuclear binding energy and mass-energy conversion
- Detail the process of energy conversion
- Exhibit an understanding of power and how it is calculated
- Provide details about the definition and use of Newton's Law of Restitution
This chapter offers the unique opportunity to get a comprehensive overview of work, power and energy from lessons you can access anytime your schedule permits. Study at your own pace from home or on-the-go! Use the multiple-choice quiz with each lesson to ensure you fully understand the concepts you review. If you need additional information about this chapter's topics, don't hesitate to send questions to our experts.
1. 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.
2. 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.
3. 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.
4. Energy: Definition & Types
After completing this lesson, you will be able to explain what energy is, list various types of energy, and identify which type or types of energy are present in a situation.
5. Mass-Energy Conversion, Mass Defect and Nuclear Binding Energy
When you hear the term 'nuclear power,' what comes to mind? Do you know where that energy and power is coming from? In this lesson, we are going to zoom in on the nucleus of a helium atom to explain how something as small as a nucleus can produce an extremely large amount of energy.
6. What is Energy Conservation? - Definition, Process & Examples
This lesson will explain what the conservation of energy principle is and why it matters, using some real-life examples of how it works in our day-to-day lives. A short quiz will follow.
7. 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.
8. Newton's Law of Restitution: Definition & Use
What is Newton's law of restitution and how is it used? Discover what the velocities before and after a collision tell you about that collision. See what problems you can solve by taking a quiz.
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