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Ch 5: AP Physics 1: Work, Energy, & Power

About This Chapter

Watch online video lessons on work, energy, and power, and learn formulas, definitions, concepts, and more. These lessons utilize engaging animations and on-screen dynamics to help you understand work, energy, and power concepts.

AP Physics 1: Work, Energy, and Power - Chapter Summary and Learning Objectives

Work, energy, and power are at the heart of physics. In this chapter, you'll learn the technical definitions of these categories and get some examples to help illustrate what they do. Our instructors have broken down this chapter into smaller lessons that each deal with one topic at a time. You'll see what the different types of energy mean and how forces are exerted on objects. You'll also learn the basic important formulas that describe the relationships between work, energy, and power. After completing this chapter, you should be able to:

  • Define work, energy, and power
  • Explain work and energy formulas
  • Identify mechanical energy in a system
  • Name different types of energy

VideoObjective
Work: Definition, Characteristics, and ExamplesUnderstand how physicists define work and learn the characteristics of work.
Work Done by a Variable ForceLearn how a changing force affects an object and the calculations involved.
What is Energy? - Definition and Significance in NatureGet a formal definition of energy and discover how it functions in our world.
Kinetic Energy to Potential Energy: Relationship in Different Energy TypesExplore the different types of energy that can be a part of a system.
Work-Energy Theorem: Definition and ApplicationUnderstand this fundamental concept and examine its applications.
What is Mechanical Energy? - Definition and ExamplesLearn about the interaction of potential energy and kinetic energy in mechanical systems.
Pulleys: Basic Mechanics Explore the basic mechanics of pulleys.
Conservation of Mechanical EnergySee how mechanical energy is conserved within an isolated system.
Power: Definition and MathematicsExamine the formal definition for power, which deals with the rate of energy transfer.

10 Lessons in Chapter 5: AP Physics 1: Work, Energy, & Power
What is Mechanical Energy? - Definition & Examples

1. 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.

Pulleys: Basic Mechanics

2. Pulleys: Basic Mechanics

Like other simple machines, pulleys can help us lift and move heavy loads with less effort. In this video lesson, you'll learn how pulleys do this as well as how this is possible while still obeying the law of conservation of energy.

Work: Definition, Characteristics, and Examples

3. 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

4. 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

5. 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

6. 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.

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.

Conservation of Mechanical Energy

8. 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.

Internal Energy of a System: Definition & Measurement

9. Internal Energy of a System: Definition & Measurement

We often talk about individual types of energy, but how do you measure total energy? One way is to find the internal energy of a system. Learn what it means and how it is measured.

Power: Definition and Mathematics

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.

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