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Ch 23: The Physics of Forces & Motion

About This Chapter

Boost your confidence before an upcoming exam with this chapter on the physics of forces and motion. Our lessons clearly outline the forces and motion topics you'll need to know on test day using detailed definitions and real-life examples.

The Physics of Forces & Motion - Chapter Summary

Our helpful chapter covers the physics of motion and forces, including how the individual forces acting upon an object are determined. You'll also review the definition and formula used for absolute magnitude and the equations and calculations used to find net force. After completing this chapter, you should be ready to:

  • Give examples of Newton's first law of motion
  • Explain what Newton's second law of motion says about force, acceleration and uniform circular motion
  • Detail how Newton's third law of motion addresses the relationship between two forces
  • Find the total force result of objects with two or more forces
  • Determine the acceleration of an object
  • Assess the orbits of planets and satellites
  • Provide an example of gravitational force
  • Discuss Coulomb's Law

Our instructors have created these text and video lessons to be enjoyable, interesting and fun. Rather than watch an entire video lesson, use the video tabs feature in the Timeline to skip to a specific section you'd like to view. After completing the lessons, take the short lesson quiz to ensure you've understood what you've just learned.

13 Lessons in Chapter 23: The Physics of Forces & Motion
Determining the Individual Forces Acting Upon an Object

1. Determining the Individual Forces Acting Upon an Object

Objects constantly have forces acting on them whether they are moving or at rest. In this video lesson, you'll understand how to identify the individual forces acting on an object by reviewing the different types of forces and the use of free-body diagrams.

Newton's First Law of Motion: Examples of the Effect of Force on Motion

2. 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.

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 Second Law & Uniform Circular Motion

4. Newton's Second Law & Uniform Circular Motion

Sure, Newton's Second Law of Motion works well in one dimension, but what happens when you put it on a curve? In this lesson, we'll see how the Second Law applies with respect to Uniform Circular Motion.

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

5. 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.

Absolute Magnitude: Definition & Formula

6. Absolute Magnitude: Definition & Formula

In this lesson you will learn the meaning of the term 'absolute magnitude', a few examples of the apparent magnitude of objects in the sky, and an equation to calculate absolute magnitude. A short quiz will follow.

What is Net Force? - Definition, Magnitude & Equations

7. What is Net Force? - Definition, Magnitude & Equations

In this lesson, we will define net force, and explore the magnitude of a net force, the relevant equations and examples that will help make the concept of net force clearer.

Net Force: Definition and Calculations

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.

Objects with Two or More Forces: Finding the Total Force Result

9. Objects with Two or More Forces: Finding the Total Force Result

After watching this video, you will be able to explain what a force is and how it relates to motion, and find the total force result in a variety of force situations. A short quiz will follow.

Determining the Acceleration of an Object

10. Determining the Acceleration of an Object

Acceleration is a change in an object's state of motion. A few variables need to be identified to calculate an object's acceleration, but once we have those values, we can put them into a simple equation to find out how quickly or slowly an object's velocity is changing.

What is Orbit? - Planets & Satellites

11. What is Orbit? - Planets & Satellites

This lesson talks about what an orbit is and defines some common terms associates with orbit. We also talk specifically about orbits of planets and satellites.

Gravitational Force: Definition, Equation & Examples

12. Gravitational Force: Definition, Equation & Examples

You probably have an idea of what gravity is, but did you know that you, right now, are actually pulling on every other object in the universe? Find out more about the gravitational force and learn an equation to calculate its pull on other objects.

Coulomb's Law: Variables Affecting the Force Between Two Charged Particles

13. Coulomb's Law: Variables Affecting the Force Between Two Charged Particles

In the 18th century, Charles Coulomb uncovered the secrets of electrostatic force between charged particles. The results of his experiments led to what is now known as Coulomb's Law, which tells us how force, charge, and distance are all related.

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