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Ch 9: AP Physics 2: Forces

About This Chapter

Use our helpful chapter on forces as they're used in physics to supplement your AP Physics class lessons or prepare for the AP Physics 2 exam. These short, self-paced text and video lessons are designed by professional instructors and explain these physics topics in an easy-to-follow way.

AP Physics 2: Forces - Chapter Summary

Our instructors cover some of the topics related to force that you might find on the AP Physics 2 exam in this engaging chapter. If you just want to watch one portion of a video lesson, use the video tabs feature in the Timeline to skip ahead, or review the entire lesson to ensure you understand the topic completely. Before moving on, you can take the multiple-choice quizzes to make sure you understand what you've reviewed. Our instructors are available to answer questions if you get stuck along the way. This chapter is designed to help you accomplish the following:

  • Define force and the different types of force
  • Utilize free-body diagrams
  • Understand the implications of mechanics on objects
  • Identify the law associated with action and reaction forces
  • Determine the individual forces on an object
  • Calculate net force
  • Find the acceleration of an object
  • Solve motion problems using free-body diagrams
  • Recognize direction and magnitude of an electric force on a point charge
  • Explain Coulomb's Law
  • Practice physics' right-hand rule
  • Use an equation to find gravitational force
  • Differentiate between electric and gravitational forces
  • Describe the characteristics of electromagnetic force
  • Name the equation used to find strong force

13 Lessons in Chapter 9: AP Physics 2: Forces
Force: Definition and Types

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.

Free-Body Diagrams

2. Free-Body Diagrams

Forces that act on an object can be drawn through special vector diagrams called free-body diagrams. In this video lesson you'll identify how to correctly represent forces in a free-body diagram through vector arrows and force labels.

Implications of Mechanics on Objects

3. Implications of Mechanics on Objects

Forces act on objects causing them to move. Mechanics is the field of science designated to the study of moving objects. This lesson describes how forces act on objects resulting in motion. Examples are used to describe how forces interact resulting in both simple and complex movement.

Action and Reaction Forces: Law & Examples

4. Action and Reaction Forces: Law & Examples

Action force is force acting in one direction. Reaction force is force acting in the opposite direction. Learn more about Newton's Third Law as it explains action and reaction forces through several examples, and test your knowledge with quiz questions.

Determining the Individual Forces Acting Upon an Object

5. 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.

Net Force: Definition and Calculations

6. 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.

Determining the Acceleration of an Object

7. 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.

Magnitude & Direction of the Electric Force on a Point Charge

8. Magnitude & Direction of the Electric Force on a Point Charge

Coulomb's Law can be used to calculate the electric force between two point charges, but what do you do when there are more than two charges present? In this lesson, learn how to calculate the magnitude and direction of the electric force when multiple charges are present.

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

9. 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.

Physics Right-Hand Rule: Definition & Practice

10. Physics Right-Hand Rule: Definition & Practice

Many of the equations and tools used in physics are pretty complex, but not all of them. In this lesson, we will explore physic's right-hand rule and then put it into practice.

Gravitational Force: Definition, Equation & Examples

11. 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.

Gravitational & Electric Forces: Similarities & Differences

12. Gravitational & Electric Forces: Similarities & Differences

Gravitational and electric forces are two of the four fundamental forces of the universe. They are calculated in very similar ways, but there are some crucial differences between them. In this lesson, learn about these similarities and differences.

Strong Force: Definition, Equation & Examples

13. Strong Force: Definition, Equation & Examples

In this lesson, you'll learn what strong force is, how it holds an atom together, and how it is balanced by electromagnetic repulsion. A short quiz will follow.

Final Exam
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AP Physics 2: Exam Prep
This course currently has no final exam ready
Chapter Exam
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AP Physics 2: Forces
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