About This Chapter
How it works:
- Identify the lessons in the Holt Physical Science Matter in Motion chapter with which you need help.
- Find the corresponding video lessons within this companion course chapter.
- Watch fun videos that cover the matter in 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:
- State of motion and velocity
- Speed and velocity
- Types of forces
- Types of friction
- Newton's laws and weight, mass and gravity
- The Law of Universal Gravitation
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1. 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.
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. Using Velocity vs. Time Graphs to Describe Motion
In this lesson, we will look at an example of a velocity vs. time graph. By examining the shape of the graph, it is possible to accurately describe the motion of an object, even if that motion is very complex.
4. 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.
5. Determining Acceleration Using the Slope of a Velocity vs. Time Graph
In this lesson, we will learn how to use the slope of the line on a velocity vs. time graph to calculate the acceleration of an object in straight line motion.
6. 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.
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. 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. 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.
10. Characteristics & Effects of Friction
Friction is the force that resists motion. An object's weight and surface material can affect the amount of friction present. Learn how to increase and decrease friction as well as the difference between static and kinetic friction.
11. 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.
12. 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.
13. The Effects of Mass & Distance on Gravity
Does gravity have you down? Well, you are not alone. Gravity is the force that pulls objects with mass toward each other. It is what holds you to the earth. Learn how the strength of gravity is affected by mass and distance.
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Other chapters within the Holt Physical Science: Online Textbook Help course
- Holt Physical Science Chapter 1: The World of Physical Science
- Holt Physical Science Chapter 2: The Properties of Matter
- Holt Physical Science Chapter 3: States of Matter
- Holt Physical Science Chapter 4: Elements, Compounds, and Mixtures
- Holt Physical Science Chapter 6: Forces and Motion
- Holt Physical Science Chapter 7: Forces in Fluids
- Holt Physical Science Chapter 8: Work and Machines
- Holt Physical Science Chapter 9: Energy and Energy Resources
- Holt Physical Science Chapter 10: Heat and Heat Technology
- Holt Physical Science Chapter 11: Introduction to Atoms
- Holt Physical Science Chapter 12: The Periodic Table
- Holt Physical Science Chapter 13: Chemical Bonding
- Holt Physical Science Chapter 14: Chemical Reactions
- Holt Physical Science Chapter 15: Chemical Compounds
- Holt Physical Science Chapter 16: Atomic Energy
- Holt Physical Science Chapter 17: Introduction to Electricity
- Holt Physical Science Chapter 18: Electromagnetism
- Holt Physical Science Chapter 19: Electronic Technology
- Holt Physical Science Chapter 20: The Energy of Waves
- Holt Physical Science Chapter 21: The Nature of Sound
- Holt Physical Science Chapter 22: The Nature of Light
- Holt Physical Science Chapter 23: Light and Our World