Ch 5: OAE Physics: Force & the Laws of Motion

About This Chapter

As you prepare for the OAE Physics complete the activities of this chapter to review the laws that define motion, equations used to find the properties of motion and the forces that effect it.

OAE Physics: Force & the Laws of Motion - Chapter Summary

This chapter has been assembled to help you review what you know about Newton's laws of motion, terms and equations used to describe the properties of motion and the different forces that affect motion. Watch these lesson videos to help you prepare for related question on the Ohio Assessments for Educators (OAE) Physics exam. Each lesson is taught by a professional instructor so that you can get a quality review of the material and prepare yourself for questions about:

  • Newton's first, second and third laws of motion
  • The relationship between inertia and mass
  • Calculations for mass and weight
  • Balanced and unbalanced forces
  • Using free-body calculations
  • Calculations for net force
  • Velocity and acceleration
  • Effects of air resistance and friction

Ensure you retain the information presented in this chapter by completing the lesson worksheets and quizzes. Use your worksheets as a guide as you review the lesson and determine what topics you haven't mastered with the results from your lesson quizzes. Once you've found out what topics you don't understand, go back to the lesson videos with video tags to improve your understanding of them. Additionally, if you would benefit from an alternative way of reviewing the material, try reading the lesson transcripts which will present you with a written out line of the lessons.

OAE Physics: Force & the Laws of Motion Chapter Objectives

The objective of the OAE Physics test is to measure future educators' mastery over the field of physics before granting them certification as physics teachers in the state of Ohio. This computer-administered certification exam achieves this objective through a series of 150 multiple-choice questions. On test day, you will be asked to complete these questions in a testing session lasting three hours and 45 minutes. Be prepared for 28% of these questions to be about mechanics, which includes Newton's laws of motion, the equations used to describe the properties of motion, and the forces that affect motion.

16 Lessons in Chapter 5: OAE Physics: Force & the Laws of Motion
Test your knowledge with a 30-question chapter practice test
Distinguishing Between Inertia and Mass

1. Distinguishing Between Inertia and Mass

Mass and inertia are both related to the amount of matter an object has, but they aren't exactly the same thing. In this video lesson, you'll see how mass affects an object's inertia, which in turn affects that object's motion.

Mass and Weight: Differences and Calculations

2. Mass and Weight: Differences and Calculations

We often talk about mass and weight as if they are the same. While they are proportional to each other, they are not, in fact, the same. In this video lesson, you will learn to distinguish between the two, as well as convert one to the other.

State of Motion and Velocity

3. State of Motion and Velocity

An object's state of motion describes how it is moving. But there are many ways we can describe motion, such as speed and velocity. This motion is relative to other objects around it, such as the earth, the sun, and even other stars in our galaxy.

Force: Definition and Types

4. 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

5. 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.

Free-Body Diagrams

6. 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.

Net Force: Definition and Calculations

7. 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.

Newton's Second Law of Motion: The Relationship Between Force and Acceleration

8. 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.

Determining the Acceleration of an Object

9. 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.

Determining the Individual Forces Acting Upon an Object

10. 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

11. 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.

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

12. 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.

Identifying Action and Reaction Force Pairs

13. 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

14. 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.

Friction: Definition and Types

15. Friction: Definition and Types

You experience friction all the time, and you should be glad you do! Friction helps keep stationary objects in place as well as slow moving objects down as they slide across a surface. This lesson identifies what friction is and explains the two ways we find this force on earth.

Inclined Planes in Physics: Definition, Facts, and Examples

16. 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.

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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