About This Chapter
ASVAB: Mechanical Comprehension - Chapter Summary
This Mechanical Comprehension chapter's lessons are aligned with the content you can expect to see on a particular portion of the ASVAB. You'll become familiar with inclined planes and thermal expansion as well as the applications for Pascal's principle by the time you're done reviewing this chapter. Once you've studied sufficiently, you will be set for answering questions about any of these topics:
- Hydrostatic pressure
- Characteristics of fluids in physics
- Properties of water
- Density, mass and weight
- Common machine elements and their functions
- Structures and functions of common compound machines
- Types of simple machines
- Centripetal force
These handy lessons can be viewed on either a computer, tablet or smartphone, and they consist of animated lessons, transcripts and short quizzes. Focus on the key terms in the text, shown in bold, and the explore chapter's helpful examples to get a firm grasp of the material.
Objectives of the ASVAB: Mechanical Comprehension Chapter
The ASVAB evaluates your aptitude for enlisting in the military based on the extent of your knowledge. It also determines suitable military job placement. The ASVAB Mechanical Comprehension subtest has 16 multiple-choice questions on the computer format, and there are 25 questions on the paper-based version. The quizzes that you can complete throughout the Mechanical Comprehension chapter give you valuable practice opportunities with questions like those on the actual exam.
1. Mass and Weight: Differences and Calculations
We often talk about mass and weight as if they are the same. While they are proportional to each other, they are not, in fact, the same. In this video lesson, you will learn to distinguish between the two, as well as convert one to the other.
2. What Is Density? - Explanation & Examples
After watching this video, you will be able to explain what density is, give examples of high and low density, and calculate density using an equation. A short quiz will follow.
3. Thermal Expansion: Definition, Equation & Examples
In this lesson, you will learn what thermal expansion is and discover an equation for calculating how much different materials expand. You'll look at a number of examples of thermal expansion. A short quiz will follow.
4. Properties of Water
Why does ice float? Why can water rise on its own against gravity in a small tube? Find out how these mysterious properties of water can be explained by hydrogen bonds.
5. Understanding the Center of Mass & Center of Gravity
After watching this video, you will be able to explain the difference between center of mass and center of gravity and give examples of situations where they would be different. A short quiz will follow.
6. Fluids in Physics: Definition and Characteristics
Fluids really know how to move! As flowing materials, fluids have some unique properties that help us understand and describe them. In this lesson you'll explore what fluids are and how they are defined in the world of physics.
7. Hydrostatic Pressure: Definition, Equation, and Calculations
This video lesson will introduce you to hydrostatic pressure in a liquid, as well as provide examples for how to calculate the liquid's pressure at a given depth.
8. Applications of Pascal's Principle
After watching this lesson, you should be able to explain what Pascal's principle is, including providing the equation that represents it. You should also be able to provide examples of Pascal's principle in action and solve problems using the equation.
9. 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.
10. Centripetal Force: Definition, Examples & Problems
After watching this video, you should be able to explain what centripetal force is, identify the centripetal force in a particular situation, and solve problems using the centripetal force equation. A short quiz will follow.
11. 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.
12. 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.
13. Inclined Planes in Physics: Definition, Facts, and Examples
If an object is not horizontal to the ground, it may be on an inclined plane. We need to adjust both the calculations and the free-body diagram when determining the net force on an object on an inclined plane. Learn how in this lesson.
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