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Ch 7: Praxis Physics: Work, Energy & Power

About This Chapter

The basics of physics involve work, energy and power, which fuels the rest of more advanced functions. This chapter goes over these ideas ahead of the Praxis Physics exam.

Praxis Physics: Work, Energy & Power - Chapter Summary

The application of work, energy and power play a critical part in the entire process of physics. This collection of video lessons looks at all three terms as you get ready to gain your certification with the Praxis Physics exam. Aside from an overview of the above topics, you can expect to study the following which are included in this chapter:

  • Work by variable force
  • Types of energy
  • The work-energy theorem
  • Mechanics of pulleys
  • Conservation of mechanical energy
  • The mathematics of power

This chapter is optimized to be viewed on all mobile devices, so it is easy and convenient for you to squeeze in a study session while you are away from your computer. In addition, the timeline feature located below the presentation makes it simple for you to resume your session wherever you left off, no matter if you started on-the-go or at home.

Praxis Physics: Work, Energy & Power - Chapter Objectives

Physics teachers have different certification requirements according to each state. The Praxis Physics exam is a general test that grants the credentials for many different grade levels. Work, energy and power all make appearances in the Mechanics section of the test, a selected-response section that takes up about thirty-two percent of the entire exam.

6 Lessons in Chapter 7: Praxis Physics: Work, Energy & Power
Test your knowledge with a 30-question chapter practice test
Overview of Work & Work by Variable Force

1. Overview of Work & Work by Variable Force

After completing this lesson, you will be able to explain what work is, and how to calculate work using the equation, and a force-distance graph. A short quiz will follow.

Energy: Definition & Types

2. 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.

Work-Energy Theorem: Definition and Application

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.

Pulleys: Basic Mechanics

4. 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.

Conservation of Mechanical Energy

5. 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.

Power: Definition and Mathematics

6. 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.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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