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Ch 10: 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 knowledge of topics such as torque, velocity and motion.

Praxis General Science: Mechanics - Chapter Summary

Refresh your memory of mechanics by studying the material in this chapter. When you review the text and video lessons, you can expand your knowledge of kinematics and various kinds of motion. In addition, you'll be reminded of how to solve equations for torque, acceleration and linear momentum. Utilizing this chapter to study for the Praxis General Science examination can help you to:

  • Define scalars and vectors
  • Solve problems related to torque
  • Understand linear momentum and conservation of linear momentum
  • Explain Newton's laws of force, motion, weight and gravity
  • Discuss examples of simple machines

Review the fundamentals of mechanics from this chapter's text and video lessons, all of which include a quiz and worksheet. Accessible 24/7 via your mobile device, the lessons are presented to you by qualified educators. Use the video tags along with the play and pause features to navigate the lessons.

9 Lessons in Chapter 10: 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.

Linear Momentum: Definition, Equation, and Examples

3. 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.

Conservation of Linear Momentum: Formula and Examples

4. 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.

Scalars and Vectors: Definition and Difference

5. 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.

Newton's Laws of Force & Motion

6. Newton's Laws of Force & Motion

Newton's laws of motion explain why we observe the motion we do in the world around us - they explain how forces work. In this lesson, we take a look at each of Newton's laws one by one.

Newton's Laws and Weight, Mass & Gravity

7. Newton's Laws and Weight, Mass & Gravity

Did you know that mass and weight are not the same? This lesson describes the difference between the two as well as the effect of gravity on weight. Examples are used to teach you how to calculate weight based on mass and acceleration of gravity.

What Are Simple Machines? - Definition, Types & Examples

8. What Are Simple Machines? - Definition, Types & Examples

If you need to move or lift a heavy object, it would be wise to use a simple machine. Though these devices are far from fancy or high-tech, they are extremely helpful for getting work done.

Torque in Physics: Equation, Examples & Problems

9. 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.

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

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