Copyright

Ch 10: Praxis Physics: Laws of Gravitation

About This Chapter

Use these lessons to prepare for questions on the Praxis Physics exam about Newton's law of universal gravitation and Kepler's three laws of planetary motion.

Praxis Physics: Laws of Gravitation - Chapter Summary

In these lessons our professional instructors will help you prepare for questions on the Praxis Physics exam regarding the laws of gravity. In this review they will explain the concept of gravity, Newton's law of universal gravitation and Kepler's three laws of planetary motion. After this chapter you should have a better understanding of:

  • Gravitational attraction
  • Gravitational potential energy
  • Newton's laws in relation to weight, mass and gravity
  • Planetary motion and Kepler's three laws
  • Periods and speeds of elliptical orbits
  • Planetary orbits and eccentricity

Since these lessons are mobile device compatible you can watch them on any internet ready mobile device when you are away from your computer. Following these lesson videos, reinforce your understanding of the material presented in them by reading the lesson transcripts. Then take the lesson quizzes to identify any topics you don't understand and use the video tags to return to and study the sections of the lessons that explained the topics you missed.

Praxis Physics: Laws of Gravitation Objectives

The Praxis Physics exam is used by some states to ensure that future physics teachers know what they need to know about their field of study before they teach students of high school physics classes. This computer-based exam is composed of 125 selected-response questions, which you will be given 2.5-hours to answer. When preparing for this exam keep in mind that 32% of these questions will be about mechanics and may include some questions about the laws of gravitation.

7 Lessons in Chapter 10: Praxis Physics: Laws of Gravitation
Test your knowledge with a 30-question chapter practice test
The Law of Universal Gravitation: Definition, Importance & Examples

1. The Law of Universal Gravitation: Definition, Importance & Examples

Gravity is what pulls us toward Earth, but it's also what pulls Earth toward us. This is explained by the law of universal gravitation, which describes how all objects in the universe have this important force between them.

Gravitational Attraction of Extended Bodies

2. Gravitational Attraction of Extended Bodies

After watching this lesson, you will be able to explain what an extended body is, understand the derivation for the force of gravity between a point charge and a long, thin bar and solve problems using the result of that derivation.

Gravitational Potential Energy: Definition, Formula & Examples

3. Gravitational Potential Energy: Definition, Formula & Examples

In this lesson, you will learn what gravitational potential is, the equation we use to calculate it, and how to use that equation. We'll look at some real-life examples so you can see how it works. A short quiz will follow.

Newton's Laws and Weight, Mass & Gravity

4. Newton's Laws and Weight, Mass & Gravity

Did you know that mass and weight are not the same? This lesson describes the difference between the two as well as the effect of gravity on weight. Examples are used to teach you how to calculate weight based on mass and acceleration of gravity.

Kepler's Three Laws of Planetary Motion

5. Kepler's Three Laws of Planetary Motion

Find out about the interesting life and major contributions of Johannes Kepler. This lesson will also teach you how to find out how long it takes a planet to revolve around the sun!

Elliptical Orbits: Periods & Speeds

6. Elliptical Orbits: Periods & Speeds

After watching this lesson, you will be able to explain what an elliptical orbit is and calculate the period and speed of an object in an elliptical orbit, if given enough information. A short quiz will follow.

Eccentricity & Orbits of Planets

7. Eccentricity & Orbits of Planets

After watching this lesson, you should be able to explain what eccentricity is and calculate the eccentricity of an orbit given relevant distance measurements. A short quiz will follow.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Support