# Ch 7: MTEL Physics: Laws of Gravitation

### About This Chapter

## MTEL Physics: Laws of Gravitation - Chapter Summary

Use our lessons to help you prepare for questions on the laws of gravitation, weight, mass and the motion of planets when you take the MTEL Physics exam. Reviewing these topics with our videos and quizzes will enable you to tackle test questions on the following:

- The law of universal gravitation and its importance
- Centripetal force and its formula
- Gravitational attraction of extended bodies
- The formula for gravitational potential energy
- Newton's laws pertaining to weight, mass and gravity
- Kepler's laws of planetary motion
- Periods and speeds of elliptical orbits
- Eccentricity and the orbits of planets

Our lessons are designed and taught by instructors who are professionals in the field and who know what you'll need to be ready for the exam. You can count on them to provide useful information on the laws of gravitation.

### 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.

### 2. Centripetal Force: Definition, Formula & Examples

When an object is traveling in a circular path, centripetal force is what keeps it fixed in that path. Learn more about this force, how it is calculated and examples of its occurrence. A quiz is provided to test your learning.

### 3. 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.

### 4. 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.

### 5. 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.

### 6. 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!

### 7. 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.

### 8. 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.

### 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.

### Other Chapters

Other chapters within the MTEL Physics (11): Practice & Study Guide course

- MTEL Physics: Scientific Research Overview
- MTEL Physics: Interpreting & Analyzing Scientific Data
- MTEL Physics: Physics Lab Safety
- MTEL Physics: Historical & Contemporary Relationships in Science
- MTEL Physics: Force & the Laws of Motion
- MTEL Physics: Rotational Motion, Collisions & Conservation
- MTEL Physics: Fluid Mechanics
- MTEL Physics: Work & Energy
- MTEL Physics: Linear & Angular Momentum
- MTEL Physics: Principles of Thermodynamics
- MTEL Physics: Electrostatics
- MTEL Physics: Circuits
- MTEL Physics: Electromagnetism
- MTEL Physics: Oscillations & Wave Motion
- MTEL Physics: Sound Waves & Principles of Acoustics
- MTEL Physics: Electromagnetic Waves
- MTEL Physics: Light, Mirrors & Lenses
- MTEL Physics: Atomic Nature of Matter & Relativity
- MTEL Physics: Quantum Theory
- MTEL Physics: Radioactive Decay & Nuclear Reactions
- MTEL Physics Flashcards