# Ch 4: Energy, Power & Momentum in Physics

### About This Chapter

## Energy, Power & Momentum in Physics - Chapter Summary

Use the video lessons found in this chapter to reinforce the physics concepts of energy, power and momentum your students have already learned. By watching the short videos, students can get a better grasp of the nature of energy, the relationship between work and energy and how to calculate the amount of work done on an object. Students can also discover how mechanical energy obeys the law of conservation energy and explore how an object's moment is impacted by mass and velocity. The video lessons offer a relaxed environment for learning and provide timelines to help students jump from one topic to another. Instructors are also available to answer any questions regarding this chapter.

## Chapter Lessons and Objectives

Lesson | Objective |
---|---|

What is Energy? - Definition and Significance in Nature | Students explore the nature of energy, the ways it is transferred from one source to another and its significance in nature. |

Work: Definition, Characteristics, and Examples | Through this lesson, students learn how work is defined in physics and explore how to calculate the amount of work done on an object. |

Work-Energy Theorem: Definition and Application | This lesson helps students examine the relationship between work and energy in physics and how it applies to various situations. |

Kinetic Energy to Potential Energy: Relationship in Different Energy Types | Instructors help students define kinetic and potential energy while examining the different types of energy that are classified as potential and kinetic. |

What is Mechanical Energy? - Definition & Examples | Students learn the definition of mechanical energy and analyze examples of kinetic and potential mechanical energy. |

Conservation of Mechanical Energy | Students discover how mechanical energy obeys the law of conservation of energy. |

Power: Definition and Mathematics | In this lesson, students learn why power is dependent upon both work and time and discover how to calculate power. |

Linear Momentum: Definition, Equation, and Examples | Students learn to identify linear momentum and explore examples of how mass and velocity impact an object's momentum. |

Momentum and Impulse: Definition, Theorem and Examples | Students analyze and explore examples of how impulse describes an object's change in momentum. |

Conservation of Linear Momentum: Formula and Examples | This lesson helps students understand why the amount of momentum for a system doesn't change, even when momenta of individual components does change. |

### 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-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.

### 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. 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.

### 6. 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.

### 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. 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.

### 9. Momentum and Impulse: Definition, Theorem and Examples

To understand how a change in momentum affects an object, we look to impulse. In this lesson, you'll understand how impulse describes an object's change in momentum, as well as how changing the force or time of the impulse can have very different outcomes.

### 10. Conservation of Linear Momentum: Formula and Examples

The law of conservation of momentum tells us that the amount of momentum for a system doesn't change. In this lesson, we'll explore how that can be true even when the momenta of the individual components does change.

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### Other Chapters

Other chapters within the Physics: Middle School course