About This Chapter
How It Works:
- Identify the lessons in the Holt McDougal Work and Energy chapter with which you need help.
- Find the corresponding video lessons within this companion course chapter.
- Watch fun videos that cover the work and energy topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.
Students will learn:
- Examples, meaning and characteristics of work
- How work is completed by variable force
- The importance of energy in nature
- The types of energy
- How to apply the work-energy theorem
- The definition of mechanical energy
- What the conservation of mechanical energy is
- The meaning of power
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1. 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.
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. 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.
4. 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.
5. 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.
6. What is Mechanical Energy? - Definition & Examples
In physics, energy is how work gets done. This video describes one important type of energy, mechanical energy, and provides examples of both kinetic and potential 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.
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 Holt McDougal Physics: Online Textbook Help course
- Holt McDougal Physics Chapter 1: The Science of Physics
- Holt McDougal Physics Chapter 2: Motion in One Dimension
- Holt McDougal Physics Chapter 3: Two-Dimensional Motion and Vectors
- Holt McDougal Physics Chapter 4: Forces and the Laws of Motion
- Holt McDougal Physics Chapter 6: Momentum and Collisions
- Holt McDougal Physics Chapter 7: Circular Motion and Gravitation
- Holt McDougal Physics Chapter 8: Fluid Mechanics
- Holt McDougal Physics Chapter 9: Heat
- Holt McDougal Physics Chapter 10: Thermodynamics
- Holt McDougal Physics Chapter 11: Vibrations and Waves
- Holt McDougal Physics Chapter 12: Sound
- Holt McDougal Physics Chapter 13: Light and Reflection
- Holt McDougal Physics Chapter 14: Refraction
- Holt McDougal Physics Chapter 15: Interference and Diffraction
- Holt McDougal Physics Chapter 16: Electric Forces and Fields
- Holt McDougal Physics Chapter 17: Electrical Energy and Current
- Holt McDougal Physics Chapter 18: Circuits and Circuit Elements
- Holt McDougal Physics Chapter 19: Magnetism
- Holt McDougal Physics Chapter 20: Electromagnetic Induction
- Holt McDougal Physics Chapter 21: Atomic Physics
- Holt McDougal Physics Chapter 22: Subatomic Physics