# Ch 19: ScienceSaurus Student Handbook Grades 6-8: Forces & Motion

### About This Chapter

## How It Works:

- Identify the lessons in the ScienceSaurus Forces & Motion chapter with which you need help.
- Find the corresponding video lessons with 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:

- What force is and types of forces
- Gravity, magnetism and electricity
- Examples and definition of centripetal force
- Balanced and unbalanced forces
- Types of friction
- Newton's laws of motion
- Work and machines
- Characteristics and motion of fluids

*ScienceSaurus is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.*

### 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. 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.

### 3. Overview of Magnetic Forces & Poles

After completing this lesson, you will be able to explain what magnetic forces are and how they can be created (with ferromagnets and electric currents), and explain how we've all got the poles of the Earth backwards. A short quiz will follow.

### 4. Electric Charge and Force: Definition, Repulsion & Attraction

Have you ever wondered what electricity is and where it comes from? Have you ever been zapped by static electricity and wondered how it got there? We'll answer all of these questions in this lesson on electric charge and force!

### 5. 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.

### 6. 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.

### 7. 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.

### 8. 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.

### 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. 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.

### 11. Work: Definition, Characteristics, and Examples

Pushing a wall all day may feel like work, but unless you get that wall moving you're not doing any work according to the rules of physics. In this video lesson, you'll learn how work is defined as well as how to calculate the amount of work done on an object.

### 12. Simple Machines: Lever, Inclined Plane & Pulley

Discover what a simple machine is and how it operates. Then learn about the mechanical advantages various simple machines such as levers, inclined planes and pulleys give us.

### 13. 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.

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### Other Chapters

Other chapters within the ScienceSaurus Student Handbook Grades 6-8: Online Textbook Help course

- ScienceSaurus Student Handbook Grades 6-8: Scientific Inquiry
- ScienceSaurus Student Handbook Grades 6-8: Designing Your Own Investigations
- ScienceSaurus Student Handbook Grades 6-8: Laboratory Safety
- ScienceSaurus Student Handbook Grades 6-8: Glassware & Microscopes
- ScienceSaurus Student Handbook Grades 6-8: Measurement
- ScienceSaurus Student Handbook Grades 6-8: Structure of Life
- ScienceSaurus Student Handbook Grades 6-8: Human Biology
- ScienceSaurus Student Handbook Grades 6-8: Physiology & Behavior
- ScienceSaurus Student Handbook Grades 6-8: Genes & Heredity
- ScienceSaurus Student Handbook Grades 6-8: Change & Diversity of Life
- ScienceSaurus Student Handbook Grades 6-8: Ecosystems
- ScienceSaurus Student Handbook Grades 6-8: Classification
- ScienceSaurus Student Handbook Grades 6-8: Showing Earth on Maps
- ScienceSaurus Student Handbook Grades 6-8: Geology
- ScienceSaurus Student Handbook Grades 6-8: Oceanography
- ScienceSaurus Student Handbook Grades 6-8: Meteorology
- ScienceSaurus Student Handbook Grades 6-8: Astronomy
- ScienceSaurus Student Handbook Grades 6-8: Matter
- ScienceSaurus Student Handbook Grades 6-8: Energy
- ScienceSaurus Student Handbook Grades 6-8: Earth's Natural Resources
- ScienceSaurus Student Handbook Grades 6-8: Resource Conservation
- ScienceSaurus Student Handbook Grades 6-8: Solid Waste & Pollution
- ScienceSaurus Student Handbook Grades 6-8: Science & Technology
- ScienceSaurus Student Handbook Grades 6-8: Science & Society
- ScienceSaurus Student Handbook Grades 6-8: Scientific Numbers
- ScienceSaurus Student Handbook Grades 6-8: Using Data Tables & Graphs
- ScienceSaurus Student Handbook Grades 6-8: Solving Math Problems in Science
- ScienceSaurus Student Handbook Grades 6-8: Classroom & Research Skills
- ScienceSaurus Student Handbook Grades 6-8: Test Taking Skills