About This Chapter
Mechanics in Physics - Chapter Summary
This comprehensive study resource will help you quickly review mechanical concepts in physics. With clear definitions and formulas, these lessons go over physics topics such as speed, velocity, momentum and friction. You'll take a look at important theorems and equations as well as simple machines and Newton's laws. After finishing the lessons in this chapter, you should be able to:
- Explain linear, simple harmonic, circular and projectile motion
- Understand concepts and formulas related to speed and velocity
- Define acceleration and know its formula
- Identify the equation, units and principle for momentum
- Know different types of friction
- Apply the work-energy theorem
- Assess mathematics relating to power
- Write the equation for gravity
- Summarize Newton's laws relating to weight, mass and gravity
- Recognize types of simple machines
- Appreciate the efficiency of compound machines
These lessons are taught by expert physics instructors who have a direct and engaging teaching style. This straightforward instructional approach simplifies the studying process and helps you remember mechanical concepts quickly and efficiently. The chapter also includes several supplemental resources to help you study, including printable lesson transcripts and interactive self-assessment quizzes. You can study whenever it fits your schedule and access lessons on your desktop, laptop, smartphone or tablet.
1. 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.
2. Speed and Velocity: Concepts and Formulas
Did you know that an object's speed and velocity may not be the same? This lesson describes the concepts of speed and velocity relating to objects in motion. We'll look at a specific example to help learn how to calculate both speed and velocity.
3. What is Acceleration? - Definition and Formula
This lesson describes the difference between speed, velocity and acceleration. Examples are used to help you understand the concept of acceleration and learn to calculate acceleration with a mathematical formula.
4. What is Momentum? - Definition, Equation, Units & Principle
People talk about momentum all the time; now you can discover what that word really means. Then learn about the principle of conservation of momentum and what it has to do with objects colliding.
5. Friction: Definition and Types
You experience friction all the time, and you should be glad you do! Friction helps keep stationary objects in place as well as slow moving objects down as they slide across a surface. This lesson identifies what friction is and explains the two ways we find this force on earth.
6. 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.
7. 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.
8. What Is Gravity? - Definition & Equation
In this video, you'll learn about the force of gravity and why what goes up must also come down. You'll also learn about the equation for determining the gravitational force between two objects and the rate at which objects accelerate toward Earth.
9. 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.
10. 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.
11. Understanding the Efficiency of Compound Machines
Compound machines are made up of two or more simple machines. When you combine simple machines, you increase the mechanical advantage, but might have to sacrifice some efficiency. Learn about compound machines and see examples.
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