Ch 23: General Science: Analyzing Forces

About This Chapter

In the state of Arizona, the AEPA General Science exam is administered to aspiring science teachers. This chapter will help you prepare for questions on the exam about the different types of forces and the calculations used to assess their interactions.

AEPA General Science: Analyzing Forces - Chapter Summary

In this series of short, engaging lesson videos, follow along with our expert instructors as they explain the different types of forces and outline some of the ways you can analyze the interactions between them. After you've completed these lessons, you should be better prepared for exam questions regarding:

  • Balanced and unbalanced force
  • Calculations for net force and the force acting upon an object
  • Effects of air resistance on free fall
  • Action and reaction force pairs
  • Normal force
  • Measurements of pressure
  • Hydrostatic pressure and fluid mass
  • Simple machines, inclined planes and torque

Take advantage of these lesson videos' versatility and watch them on your mobile devices when you are away from your computer. The transcripts will present you with written overviews of the lessons and identify key terms. When you complete these lessons make sure you have retained the information presented in them by taking the lesson quizzes.

AEPA General Science: Analyzing Forces Chapter Objectives

The state of Arizona administers AEPA General Science exam to future science teachers as a way to insure that they're capable of teaching the natural sciences. When you take this computer-based certification exam, you will be presented with 150 multiple-choice questions to answer in three hours or less. About 37% of the exam's questions focus on the physical sciences. This chapter allows you to review the different types of force.

13 Lessons in Chapter 23: General Science: Analyzing Forces
Test your knowledge with a 30-question chapter practice test
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.

Forces: Balanced and Unbalanced

2. 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.

Net Force: Definition and Calculations

3. 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 Individual Forces Acting Upon an Object

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.

Air Resistance and Free Fall

5. 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.

Identifying Action and Reaction Force Pairs

6. Identifying Action and Reaction Force Pairs

Good things often come in pairs, and forces are no exception. In this lesson you'll explore Newton's second and third laws of motion to understand how action and reaction pairs affect objects interacting with each other.

The Normal Force: Definition and Examples

7. The Normal Force: Definition and Examples

The normal force is also called the contact force because it only exists when objects are touching. In this lesson, we will investigate what the normal force is and how to calculate it on flat and inclined surfaces.

Inclined Planes in Physics: Definition, Facts, and Examples

8. Inclined Planes in Physics: Definition, Facts, and Examples

If an object is not horizontal to the ground, it may be on an inclined plane. We need to adjust both the calculations and the free-body diagram when determining the net force on an object on an inclined plane. Learn how in this lesson.

Pressure: Definition, Units, and Conversions

9. Pressure: Definition, Units, and Conversions

Have you ever wondered what pressure is and how it gets measured? In this lesson, we are going to define pressure and explain some of the units that are used to express measurements of pressure.

Hydrostatic Pressure: Definition, Equation, and Calculations

10. Hydrostatic Pressure: Definition, Equation, and Calculations

This video lesson will introduce you to hydrostatic pressure in a liquid, as well as provide examples for how to calculate the liquid's pressure at a given depth.

Fluid Mass, Flow Rate and the Continuity Equation

11. Fluid Mass, Flow Rate and the Continuity Equation

Fluids rarely stay put, so we need to understand how they move. In this lesson, you will learn about how the movement of fluids is influenced by the space it passes through, as well as see examples of how to calculate aspects of this movement.

What Are Simple Machines? - Definition, Types & Examples

12. What Are Simple Machines? - Definition, Types & Examples

If you need to move or lift a heavy object, it would be wise to use a simple machine. Though these devices are far from fancy or high-tech, they are extremely helpful for getting work done.

What is Torque? - Definition, Equation & Calculation

13. What is Torque? - Definition, Equation & Calculation

You've probably heard of torque before, maybe while discussing cars. Now learn what it really is, and what it has to do with rotational equilibrium. Then, work through an example problem that combines the two.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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Other Chapters

Other chapters within the AEPA General Science (NT311): Practice & Study Guide course

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