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Ch 12: Chapter 12: Forces - Holt Physical Science With Earth & Space Science

About This Chapter

The Forces chapter of this Holt Science Spectrum - Physical Science with Earth and Space Science Companion Course helps students learn the essential lessons associated with forces. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Forces textbook chapter.

How It Works:

  • Identify the lessons in the Holt Forces chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the forces 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:

  • Newton's first, second and third laws of motion
  • What terminal velocity is
  • The effects of mass on inertia
  • The difference between weight and mass
  • The definition and equation for momentum
  • What gravity is and its effect on weight

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9 Lessons in Chapter 12: Chapter 12: Forces - Holt Physical Science With Earth & Space Science
Test your knowledge with a 30-question chapter practice test
Newton's First Law of Motion: Examples of the Effect of Force on Motion

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.

Distinguishing Between Inertia and Mass

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.

Newton's Second Law of Motion: The Relationship Between Force and Acceleration

3. 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.

Newton's Laws and Weight, Mass & Gravity

4. 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.

The Law of Universal Gravitation: Definition, Importance & Examples

5. 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.

Air Resistance and Free Fall

6. 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.

Projectile Motion: Definition and Examples

7. Projectile Motion: Definition and Examples

A projectile is any object that is given an initial velocity and then follows a path determined entirely by gravity. In this lesson, we will introduce projectile motion and touch on a few key facts to keep in mind when working through these problems.

Newton's Third Law of Motion: Examples of the Relationship Between Two Forces

8. 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.

What is Momentum? - Definition, Equation, Units & Principle

9. 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.

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

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