About This Chapter
How it works:
- Identify the lessons in the Holt Physical Science 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:
- The acceleration of gravity
- Air resistance and free fall
- Projectile motion
- Newton's Laws of Motion
- Linear momentum
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1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. Linear Momentum: Definition, Equation, and Examples
Any moving object has momentum, but how much momentum it has depends on its mass and velocity. In this lesson, you'll identify linear momentum, as well as see examples of how an object's momentum is affected by mass and velocity.
9. Conservation of Linear Momentum: Formula and Examples
The law of conservation of momentum tells us that the amount of momentum for a system doesn't change. In this lesson, we'll explore how that can be true even when the momenta of the individual components does change.
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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 5: Matter in 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