About This Chapter
How It Works:
- Identify the lessons in Prentice Hall Physical Science's Forces and Motion chapter with which you need help.
- Find the corresponding video lessons within this companion course chapter.
- Watch fun videos that cover the forces and motion topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.
Students will learn:
- Types of forces
- Balanced and unbalanced forces
- How to solve centripetal force problems
- Types of friction
- Difference between mass and inertia
- Distinction between mass and weight
- Newton's three laws of motion
- Law of universal gravitation
- Newton's force of gravity formula
- Formula for acceleration due to gravity
- Impact of air resistance on falling objects
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1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. The Law of Universal Gravitation: Definition, Importance & Examples
Gravity is what pulls us toward Earth, but it's also what pulls Earth toward us. This is explained by the law of universal gravitation, which describes how all objects in the universe have this important force between them.
11. Isaac Newton's Formula for the Force of Gravity: Definition & Example
Watch this video lesson and you will see how you can calculate the force of attraction between two objects. Learn why our planets don't spin themselves out of orbit around the sun.
12. The Acceleration of Gravity: Definition & Formula
In this lesson, we will introduce the acceleration due to gravity. Objects in free fall are one of the few real world examples of straight line motion with constant acceleration, so they are commonly used when learning kinematics.
13. 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.
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Other chapters within the Prentice Hall Physical Science: Online Textbook Help course
- Chapter 1: Science Skills
- Chapter 2: Properties of Matter
- Chapter 3: States of Matter
- Chapter 4: Atomic Structure
- Chapter 5: The Periodic Table
- Chapter 6: Chemical Bonds
- Chapter 7: Chemical Reactions
- Chapter 8: Solutions, Acids, and Bases
- Chapter 9: Carbon Chemistry
- Chapter 10: Nuclear Chemistry
- Chapter 11: Motion
- Chapter 13: Forces in Fluids
- Chapter 14: Work, Power, and Machines
- Chapter 15: Energy
- Chapter 16: Thermal Energy and Heat
- Chapter 17: Mechanical Waves and Sound
- Chapter 18: The Electromagnetic Spectrum and Light
- Chapter 19: Optics
- Chapter 20: Electricity
- Chapter 21: Magnetism