# Physics Tutorial 8.2 - Gravitational Potential Energy. Kepler Laws

There are 4 lessons in this physics tutorial covering Gravitational Potential Energy. Kepler Laws. The tutorial starts with an introduction to Gravitational Potential Energy. Kepler Laws and is then followed with a list of the separate lessons, the tutorial is designed to be read in order but you can skip to a specific lesson or return to recover a specific physics lesson as required to build your physics knowledge of Gravitational Potential Energy. Kepler Laws. you can access all the lessons from this tutorial below.

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In this Physics tutorial, you will learn:

• Express the gravitational potential energy in terms of masses of objects and the distance between them
• Know the meaning of cosmic velocities and what they are used for
• Identify the three Kepler Laws
• Know how to relate Kepler Laws to rotational motion equations
• Know how to use Kepler Laws to study the Universe
• Know the meaning and formula of gravitational potential
• Know how gravitational potential is related to gravitational potential energy

## Introduction

Do you think celestial bodies move randomly or they have a certain regularity when they move in the sky?

Why planets do not collapse with each other and with the Sun?

Is it possible to calculate the mass of celestial bodies from the Earth?

Do planets rotate at the same speed around the Sun?

We will provide answers for the above and other questions during the explanation of this topic. Therefore, please read the tutorial carefully.

Please select a specific "Gravitational Potential Energy. Kepler Laws" lesson from the table below, review the video tutorial, print the revision notes or use the practice question to improve your knowledge of this physics topic.

Gravitation Learning Material
Tutorial IDPhysics Tutorial TitleTutorialVideo
Tutorial
Revision
Notes
Revision
Questions
8.2Gravitational Potential Energy. Kepler Laws
Lesson IDPhysics Lesson TitleLessonVideo
Lesson
8.2.1A Quick Recap on Gravitational Potential Energy
8.2.2Cosmic Velocities
8.2.3Kepler Laws
8.2.4Gravitational Potential

## Whats next?

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4. Check your calculations for Gravitation questions with our excellent Gravitation calculators which contain full equations and calculations clearly displayed line by line. See the Gravitation Calculators by iCalculator™ below.
5. Continuing learning gravitation - read our next physics tutorial: Newton's Law of Gravitation

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