About This Chapter
Force, Work, Energy & Power - Chapter Summary
The lessons in this chapter provide an overview of force, work, energy, and power. You'll review energy from wind sources, energy conservation, and uniform circular motion. You'll also look at the use of oil, natural gas, and coal as fossil fuels. After completing the chapter, you should be prepared to:
- Discuss different types of force, including normal force and unbalanced force
- Explain how a simple machine operates and detail mechanical advantages
- Describe the relationship between work and energy
- Explain the meaning of work done by a variable force
- Define energy, power, and work
- List various types of energy
- Discuss the pros and cons of using fossil fuels
- Examine the conservation of energy principle
These lessons help you quickly get up to speed on the topics covered. Vocabulary words are highlighted in bold for quick reference. You can use the Help feature to submit questions to instructors if you get stuck on a topic. Video timelines let you easily navigate to specific topics. Each lesson is also accompanied by a full written transcript.
1. Force: Definition and Types
Force is everywhere and it comes in a variety of sizes, directions, and types. In this video lesson, you'll identify force as well the different types of force that objects may experience.
2. The Normal Force: Definition and Examples
The normal force is also called the contact force because it only exists when objects are touching. In this lesson, we will investigate what the normal force is and how to calculate it on flat and inclined surfaces.
3. Unbalanced Force: Definition & Example
Unbalanced forces are forces that cause a change in the motion of an object. Learn more about how to identify balanced and unbalanced forces through several examples and test your knowledge with quiz questions.
4. Simple Machines: Lever, Inclined Plane & Pulley
Discover what a simple machine is and how it operates. Then learn about the mechanical advantages various simple machines such as levers, inclined planes and pulleys give us.
5. Uniform Circular Motion: Definition & Mathematics
After watching this lesson, you will be able to explain what uniform circular motion is, in terms of both acceleration and forces. You will also be able to use equations for centripetal force and acceleration to solve problems. A short quiz will follow.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
11. Kinetic Energy of Rotation
After watching this lesson, you will be able to explain what kinetic energy of rotation is, provide the equation to calculate it, and solve simple kinetic energy of rotation problems. A short quiz will follow.
12. Creating Energy from Solar, Wind, and Water Sources
Much of what we do requires an energy supply. But where does this energy come from? Often we get it from natural sources, such as wind, water, and sunlight, and in this lesson, you'll learn how these can be converted to electricity for our everyday use.
13. What Are Fossil Fuels? - Definition, Advantages & Disadvantages
Fossil fuels are sources of energy that have developed within the earth over millions of years. Because fossil fuels - oil, natural gas, and coal - take so long to form, they are considered nonrenewable. Learn more about these fuels, including the pros and cons of using them.
14. 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.
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Other chapters within the ICSE Physics: Study Guide & Syllabus course
- Measurement in Physics
- Presentation of Scientific Data
- Motion in One Dimension
- Laws of Motion & Gravitation
- Properties of Fluids in Physics
- Heat & Temperature in Physics
- Reflection of Light
- Nature of Sound Waves
- Understanding Electricity & Magnetism
- Properties of Light
- Modern Physics Overview
- ICSE Physics Flashcards