About This Chapter
Laws of Motion - Chapter Summary
Use the fun video lessons in this chapter to refresh or improve your understanding of Newton's three laws of motion. Our professional instructors explain these important laws and give examples to help you grasp the concepts. You'll also study mass, velocity, gravity and air resistance. The lessons cover topics such as inclined planes, friction and balanced and unbalanced forces as well. In addition to explaining the principles behind Newton's laws of motion, you should be able to do the following after completing the chapter:
- Distinguish between mass and inertia as well as mass and weight
- List the types of forces and friction
- Interpret free-body diagrams
- Calculate net force
- Determine an object's acceleration and the forces acting upon it
- Explain the relationship between Newton's laws and weight, mass and gravity
- Identify action and reaction force pairs
- Give examples of the normal force in action
There are several physics concepts to cover in this chapter, but our short video lessons break them down in an entertaining way. We offer multiple features with our lessons to make your study time more effective. Video tags allow you to easily review key points without having to rewatch entire lessons. If you want to study Newton's laws in written form, we provide transcripts of our videos as well. Once you're ready, take the multiple-choice lesson quizzes to check your comprehension of the material.
1. Newton's First Law of Motion: Examples of the Effect of Force on Motion
This lesson describes Newton's first law of motion, also known as the law of inertia. The interaction between force and motion is explained. Several examples are used to discuss the implications of this law on earth and in space.
2. Distinguishing Between Inertia and Mass
Mass and inertia are both related to the amount of matter an object has, but they aren't exactly the same thing. In this video lesson, you'll see how mass affects an object's inertia, which in turn affects that object's motion.
3. 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.
4. State of Motion and Velocity
An object's state of motion describes how it is moving. But there are many ways we can describe motion, such as speed and velocity. This motion is relative to other objects around it, such as the earth, the sun, and even other stars in our galaxy.
5. Force: Definition and Types
Force is everywhere and it comes in a variety of sizes, directions, and types. In this video lesson, you'll identify force as well the different types of force that objects may experience.
6. Forces: Balanced and Unbalanced
Forces are needed to start or stop an object's motion, but can also be involved when an object is at rest or already traveling at constant velocity. In this video lesson, you'll identify the difference between balanced and unbalanced forces, understanding how they affect the movement of objects.
7. Free-Body Diagrams
Forces that act on an object can be drawn through special vector diagrams called free-body diagrams. In this video lesson you'll identify how to correctly represent forces in a free-body diagram through vector arrows and force labels.
8. Net Force: Definition and Calculations
Because forces are vectors, we can't simply add them up to get a total amount of force on an object. Instead, we calculate the net force, which is important to understand because it tells us about an object's state of motion.
9. Newton's Second Law of Motion: The Relationship Between Force and Acceleration
This lesson defines Newton's second law of motion. Examples are used to illustrate how unbalanced forces cause objects to accelerate. The examples are used to practice calculating acceleration and force for objects in motion.
10. Determining the Acceleration of an Object
Acceleration is a change in an object's state of motion. A few variables need to be identified to calculate an object's acceleration, but once we have those values, we can put them into a simple equation to find out how quickly or slowly an object's velocity is changing.
11. Determining the Individual Forces Acting Upon an Object
Objects constantly have forces acting on them whether they are moving or at rest. In this video lesson, you'll understand how to identify the individual forces acting on an object by reviewing the different types of forces and the use of free-body diagrams.
12. Air Resistance and Free Fall
Through experiments by Galileo and Newton, we can understand why all objects in free-fall experience the same acceleration, ''g''. We can also see why air resistance affects a falling object's velocity and how this can lead to a falling object reaching a terminal velocity.
13. Newton's Third Law of Motion: Examples of the Relationship Between Two Forces
This lesson describes Newton's third law of motion. Examples are provided to illustrate how interacting objects experience forces. The lesson explains how objects accelerate as a result of force. Applications of Newton's third law are illustrated in nature, machines, and space.
14. 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.
15. Identifying Action and Reaction Force Pairs
Good things often come in pairs, and forces are no exception. In this lesson you'll explore Newton's second and third laws of motion to understand how action and reaction pairs affect objects interacting with each other.
16. The Normal Force: Definition and Examples
The normal force is also called the contact force because it only exists when objects are touching. In this lesson, we will investigate what the normal force is and how to calculate it on flat and inclined surfaces.
17. 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.
18. 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.
19. Calculating Deceleration: Definition, Formula & Examples
In this lesson, you will learn about deceleration, what it means, and how it is a specific special case of acceleration. You will learn about which equations can be used to calculate deceleration and how to identify deceleration from position-time and velocity-time graphs of motion.
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Other chapters within the AEPA Physics (NT308): Practice & Study Guide course
- The History and Nature of Science
- Principles and Procedures of Scientific Inquiry
- Safety Procedures and Hazards in Scientific Research
- Interdisciplinary Relationships in Science
- Math for Physics
- Equilibrium and Elasticity
- Linear Momentum in Physics
- Simple Harmonic Motion & Oscillations
- Laws of Gravitation
- Work, Energy and Power in Physics
- Rotational Motion
- Fluids and Related Principles in Physics
- Thermodynamics in Physics
- Electric Force and Charge
- Circuits in Physics
- The Physics of Magnetism
- Waves, Sound, and Light
- Wave Optics
- Modern and Nuclear Physics
- AEPA Physics Flashcards