Ch 16: Praxis General Science: Mechanics

About This Chapter

Comprised of text and video lessons, this chapter focuses on mechanics in physics. It will help you get set for the Praxis General Science examination by complementing your store of knowledge of topics such as torque, friction and motion.

Praxis General Science: Mechanics - Chapter Summary

Refresh your memory of mechanics by studying the material in this chapter. When you review related topics through its text and video lessons, you could develop expanded knowledge of the causes of friction and various kinds of motion. In addition, you'll be reminded of how to solve equations for torque, acceleration and centripetal force. Utilizing this chapter to study for the Praxis General Science examination can help you to:

  • Identify the Big Five kinematics equations
  • Define acceleration, distance, kinematics and uniform circular motion
  • Describe circular, linear, projectile and simple harmonic motion
  • Contrast vectors and scalars
  • Understand torque and centripetal force
  • List different forms of friction

As your Praxis General Science examination date approaches, you can prepare to answer some of its questions. Learn about the fundamentals of mechanics from this chapter's text and video lessons, all of which include quizzes, worksheets and detailed transcripts. Accessible 24/7 via your mobile technology, the lessons are presented to you by qualified educators. Use the video tags along with the play and pause features to navigate the lessons.

Praxis General Science: Mechanics Chapter Objectives

The Physical Science content category of the Praxis General Science examination encompasses topics on mechanics. You'll answer questions similar to those you completed during the lesson quizzes in this chapter. Draw upon your chapter review, quiz performances and prior education when completing this category's questions on speed, linear momentum, acceleration, and scalars and vectors. The approximate test percentage of the Physical Science category is 38%, and it has about 51 questions.

The other four content categories of the examination are: Scientific Methodology, Techniques and Development, Life Science, Earth and Space Science and Science, Technology and Society. In all, there are 135 multiple-choice questions on the computer-based test, which takes about 2.5 hours to finish.

7 Lessons in Chapter 16: Praxis General Science: Mechanics
Test your knowledge with a 30-question chapter practice test
Kinematics: Displacement, Velocity & Acceleration

1. Kinematics: Displacement, Velocity & Acceleration

Discover the differences between displacement, velocity and acceleration: three of the most important terms in kinematics, which are easy to mix up. Answer questions to test your knowledge.

Motion: Linear, Simple Harmonic, Circular & Projectile

2. Motion: Linear, Simple Harmonic, Circular & Projectile

While you may be able to define 'motion' as it relates to science, do you know how simple harmonic, circular, linear and projectile motion differ from one another? Continue reading to find out more about these different types of motion, and then see if you can answer the questions on the follow-up quiz.

Scalars and Vectors: Definition and Difference

3. Scalars and Vectors: Definition and Difference

In this lesson, we will examine scalars and vectors, learn why it is important to know the difference between the two and why remembering to add a direction to many of your exam answers could be the reason you get it right or wrong.

Torque in Physics: Equation, Examples & Problems

4. Torque in Physics: Equation, Examples & Problems

After watching this video, you will be able to explain what torque is and use an equation to calculate torque in simple situations. A short quiz will follow.

What is Friction? - Definition, Formula & Forces

5. What is Friction? - Definition, Formula & Forces

Friction is the force that opposes the motion of an object. Learn about the sources of friction, identify examples of friction and test your knowledge with quiz questions.

Uniform Circular Motion: Definition & Mathematics

6. Uniform Circular Motion: Definition & Mathematics

After watching this lesson, you will be able to explain what uniform circular motion is, in terms of both acceleration and forces. You will also be able to use equations for centripetal force and acceleration to solve problems. A short quiz will follow.

The Centripetal Force Requirement: Definition, Examples & Problems

7. The Centripetal Force Requirement: Definition, Examples & Problems

What keeps a roller coaster in a loop? Learn about centripetal force, what causes a centripetal force, and how to calculate it. Complete a quiz to test your knowledge.

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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