# Ch 10: AP Physics 2: Forces

### About This Chapter

## 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. Use the video tags 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
- 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
- Use an equation to find gravitational force
- Differentiate between electric and gravitational forces
- Describe strong forces and give examples
- Solve mathematical representations of free-body diagrams

### 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. 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.

### 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.

### 4. 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.

### 5. 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.

### 6. 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.

### 7. How to Use Free-Body Diagrams to Solve Motion Problems

The free-body diagram is a powerful way to analyze forces in a scenario. This lesson describes the rules you should follow when using a free-body diagram, and includes multiple examples modeling how to solve force problems.

### 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, you'll learn how to calculate the magnitude and direction of the electric force when multiple charges are present.

### 9. 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.

### 10. Solving Mathematical Representations of Free-Body Diagrams

A free-body diagram is a visual way to represent the forces acting on a mass. This lesson will go through how to set up and solve the mathematical expressions required to determine the acceleration of the mass.

### 11. 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.

### 12. 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.

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### Other Chapters

Other chapters within the AP Physics 2: Exam Prep course

- AP Physics 2: Properties & Structure of Systems
- AP Physics 2: Fluids & Fluid Flow
- AP Physics 2: Electric Charge
- AP Physics 2: Mass & Energy
- AP Physics 2: Properties of Objects, Space & Time
- AP Physics 2: Properties of Matter
- AP Physics 2: Vector & Scalar Fields
- AP Physics 2: Electric Fields
- AP Physics 2: Magnetic Fields
- AP Physics 2: Newton's Laws of Motion
- AP Physics 2: Force Labs
- AP Physics 2: Electric & Magnetic Properties of a System
- AP Physics 2: Thermodynamics & Entropy
- AP Physics 2: Conservation Principles
- AP Physics 2: Conservation in Electrical Circuits
- AP Physics 2: Conservation of Electric Charge
- AP Physics 2: Conservation of Nucleon Number
- AP Physics 2: Conservation of Linear Momentum
- AP Physics 2: Waves
- AP Physics 2: Reflection & Refraction
- AP Physics 2: Electromagnetic Radiation
- AP Physics 2: Wave Models
- AP Physics 2: Ideal Gas
- AP Physics 2 Flashcards