# Ch 7: AP Physics C: Work, Energy, & Power

### About This Chapter

## AP Physics C: Work, Energy, and Power - Chapter Summary and Learning Objectives

If physics is about moving objects, then work, or an applied force that creates movement, is at the heart of this science. In this chapter, you'll learn the formal definitions of work, energy, and power as well as how the three are related. You'll look at experiments and situations that will help you understand the concepts in each video. You'll see the different types of energy in action and how energy works within a system. This chapter is designed to teach you:

- The definitions of work, energy, and power
- The equations relating work, energy, and power
- How to make calculations about work
- The different types of energy

Video | Objective |
---|---|

Work: Definition and Mathematics | Take a look at how physicists define work and the formula that relates it to energy. |

Work Done by a Variable Force | See how an object is affected by a changing force and the calculations you can make. |

What is Energy? - Definition and Significance in Nature | Learn the definition of energy and how it works in the world. |

Kinetic Energy to Potential Energy: Relationship in Different Energy Types | Understand the different types of energy and how they are related. |

Potential Energy Curves | Explore these graphs that relate energy to an object's position. |

Work-Energy Theorem | Discover this fundamental concept that deals with energy from work applied to particles. |

What is Mechanical Energy? - Definition and Examples | Take a look at how mechanical systems include both potential and kinetic energy. |

Conservation of Mechanical Energy | Understand how energy flows within an isolated mechanical system. |

Power | Learn what power means to physicists and the rate of energy transfer. |

### 1. Work: Definition, Characteristics, and Examples

In physics, work refers to the distance an object moves due to the force applied to it. Learn about the definition, components, and characteristics of work, and discover how to calculate the amount of work done on an object through some examples.

### 2. Work Done by a Variable Force

In physics, work is simply the amount of force needed to move an object a certain distance. In this lesson, discover how to calculate work when it is done by a variable force using rectangular approximation and integration.

### 3. What is Energy? - Definition and Significance in Nature

Energy is the capacity or ability to perform work, which is significant in causing anything to move within nature. Explore the different types of energy, where it comes from, why it is necessary, and how it is important in natural systems.

### 4. Kinetic Energy to Potential Energy: Relationship in Different Energy Types

Kinetic energy and potential energy are created differently. In this lesson, we will dive into different types of energy, and how they can be transformed into other types of energy.

### 5. Work-Energy Theorem: Definition and Application

The work-energy theorem relates the net work done of forces on an object and the change in the kinetic energy of the object. Learn about the definition and application of the work-energy theorem, explore work as a change in energy, discover how the work-energy theorem can be applied to the potential energy of an object, and understand how the increase or decrease in energy is associated with the work-energy theorem.

### 6. What is Mechanical Energy? - Definition & Examples

Mechanical energy can be defined by the energy possessed by an object. Explore the two forms of mechanical energy, examples of mechanical energy, and discover the definitions of energy and work.

### 7. Pulleys: Basic Mechanics

Pulleys are simple machines composed of wheels with looped ropes, cables, or chains that are designed to hold and lift loads. Learn how machines multiply force, explore the basic mechanics and types of a pulley, and discover the application of pulleys in the real world.

### 8. Conservation of Mechanical Energy

In physics, mechanical energy refers to the power that an object obtains based on its position or movement. Learn about the conservation of mechanical energy, including kinetic and potential mechanical energy. Explore how energy is conserved in a system, review conservation in action, and recognize outside forces on the system.

### 9. Power: Definition and Mathematics

Power in mathematics refers to how much work can be done in a certain amount of time, meaning the more work that can be done in the same amount of time means more power. Study the definition of power in mathematics and how it is calculated.

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### Other Chapters

Other chapters within the AP Physics C - Mechanics: Exam Prep course

- AP Physics C: Vectors
- AP Physics C: Kinematics
- AP Physics C: Acceleration, Velocity, & Gravity
- AP Physics C: Newton's First Law of Motion
- AP Physics C: Newton's Second Law of Motion
- AP Physics C: Newton's Third Law of Motion
- AP Physics C: Linear Momentum
- AP Physics C: Rotational Motion
- AP Physics C: Laws of Gravitation
- AP Physics C: Oscillations
- AP Physics C - Mechanics Flashcards