About This Chapter
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.
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.
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.
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.
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.
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.
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.
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.
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.
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Other chapters within the AEPA Physics (NT308): Practice & Study Guide course
- The History and Nature of Science
- Principles and Procedures of Scientific Inquiry
- Safety Procedures and Hazards in Scientific Research
- Interdisciplinary Relationships in Science
- Math for Physics
- Laws of Motion
- Equilibrium and Elasticity
- Linear Momentum in Physics
- Simple Harmonic Motion & Oscillations
- Laws of Gravitation
- Rotational Motion
- Fluids and Related Principles in Physics
- Thermodynamics in Physics
- Electric Force and Charge
- Circuits in Physics
- The Physics of Magnetism
- Waves, Sound, and Light
- Wave Optics
- Modern and Nuclear Physics
- AEPA Physics Flashcards