Ch 2: Energy and Momentum

About This Chapter

Watch video lessons to learn all about the various types of energy and the laws of thermodynamics. These lessons utilize engaging animations and graphics to help you easily retain key concepts associated with energy and momentum.

Energy and Momentum - Chapter Summary and Learning Objectives

Work takes place when a force acts on something, causing a change or movement. Discover how energy influences you and the natural world surrounding you in this chapter. You can study the various types of energy, the work-energy theorem and the laws of thermodynamics through these video lessons with quizzes. By the time you work your way to the end of this chapter, you should be able to:

  • Use the formula to calculate work
  • Explain the relationship between kinetic energy and potential energy
  • Discuss the laws of thermodynamics
  • Describe the various forms of energy

Video Objective
Work: Definition & Mathematics Use the formula to calculate work.
Work Done by a Variable Force Explain variable force and connection to work accomplished.
What is Energy? - Definition and Significance in Nature Discuss the importance of energy in nature.
Kinetic Energy to Potential Energy: Relationship in Different Energy Types Understand the differences between kinetic and potential energy.
Power Define power and its units of measurement.
Momentum Understand the formula for momentum and its use in classical mechanics.
Work-Energy Theorem Study how kinetic energy is created in the work done by the net force.
First Law of Thermodynamics: Law of Conservation of Energy Describe this law and its use while accounting for all energy types.
Second Law of Thermodynamics: Entropy and Systems Define entropy and develop examples of how the entropy of a system increases over time.
What is Mechanical Energy? - Definition & Examples Describe mechanical energy and identify examples in nature.
Conservation of Mechanical Energy Explain how mechanical energy is conserved.
What is Thermal Energy? - Definition & Examples Describe thermal energy and identify examples in nature.
What is Radiant Energy? - Definition & Examples Describe radiant energy and identify examples in nature.
What is Chemical Energy? - Definition & Examples Describe chemical energy and identify examples in nature.
What is Electrical Energy? - Definition & Examples Describe electrical energy and identify examples in nature.
What is Nuclear Energy? - Definition & Examples Describe nuclear energy and identify examples in nature.

16 Lessons in Chapter 2: Energy and Momentum
Test your knowledge with a 30-question chapter practice test
Work: Definition, Characteristics, and Examples

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.

Work Done by a Variable Force

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.

What is Energy? - Definition and Significance in Nature

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.

Kinetic Energy to Potential Energy: Relationship in Different Energy Types

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.

Power: Definition and Mathematics

5. 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.

Linear Momentum: Definition, Equation, and Examples

6. Linear Momentum: Definition, Equation, and Examples

Any moving object has momentum, but how much momentum it has depends on its mass and velocity. In this lesson, you'll identify linear momentum, as well as see examples of how an object's momentum is affected by mass and velocity.

Work-Energy Theorem: Definition and Application

7. 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.

First Law of Thermodynamics: Law of Conservation of Energy

8. First Law of Thermodynamics: Law of Conservation of Energy

This video describes the first law of thermodynamics. Several examples of the application of this law are discussed. The significance of the law and its practical application are discussed as well.

Second Law of Thermodynamics: Entropy and Systems

9. Second Law of Thermodynamics: Entropy and Systems

In this lesson, we'll learn about the second law of thermodynamics. By studying this law, you'll understand how energy works and why we're all moving towards eventual chaos and disorder.

What is Mechanical Energy? - Definition & Examples

10. 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.

Conservation of Mechanical Energy

11. 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.

What is Thermal Energy? - Definition & Examples

12. What is Thermal Energy? - Definition & Examples

This lesson defines and identifies examples of thermal energy everywhere from your kitchen to the Earth's core. We'll discuss geothermal energy, a renewable energy source, as well.

What is Radiant Energy? - Definition & Examples

13. What is Radiant Energy? - Definition & Examples

This lesson defines and describes radiant energy in its different forms. The different types of electromagnetic waves created by radiant energy are identified and described as well. This includes X-rays, microwaves, and radio waves, to mention a few.

What is Chemical Energy? - Definition & Examples

14. What is Chemical Energy? - Definition & Examples

This lesson describes chemical energy as a type of potential energy stored in chemicals, such as sugar and gasoline. The lesson discusses how energy is transferred from solar energy to chemical energy by plants and how gasoline is a source of chemical energy used to move cars.

What is Electrical Energy? - Definition & Examples

15. What is Electrical Energy? - Definition & Examples

This lesson defines electrical energy and explores its role as a form of potential energy. It also offers an explanation of how it functions within electric fields and provides examples of its applications.

What is Nuclear Energy? - Definition & Examples

16. What is Nuclear Energy? - Definition & Examples

You've probably heard of nuclear energy. But what is it? And what is the difference between fusion and fission? This lesson will answer your questions about this exciting form of energy that involves atoms and their nuclei.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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