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### Gravity Overview

All objects with mass attract and are attracted by all other objects with mass because of a force called gravity. The strength of gravity is proportional to the mass of the object. We are pulled to the Earth by it's gravitational forces but we also pull the earth towards us. Because we are much less massive than than the Earth, our gravitational pull is not strong enough to have any effect on it. Gravity pulls us towards Earth such that we accelerate at 9.8 m/s^{2}.

A walkthrough of the basics of A-Level gravitation physics.
### Center of Mass

The center of mass is the position of the average of all the mass of an object or a system.

Finding an object's center of mass or center of gravity

An educational video about center of mass.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

More Lessons for High School Physics

Math Worksheets

A series of free Online High School Physics Video Lessons.

In this lesson, we will learn

- about gravity
- center of mass
- toppling and stability

A walkthrough of the basics of A-Level gravitation physics.

Finding an object's center of mass or center of gravity

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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