In this document, we will try to answer a fundamental question of physical science, "Why do things start to move, slow down, speed up, stop moving or change direction?" In answering these core questions we can develop concepts that can...

This well-written explanation of relativity includes animations and pictures which may be helpful in understanding a tough topic.

Newton's First Law also called the law of inertia is the most important thing to realize about motion. This article offers more information on motion and explains solved problems involving Newton's First Law. Also included is a video...

This article offers a description and real-life examples of Newton's Third Law. Practice questions are included to test your knowledge!

This article on weight will help you prepare for the AP Physics test. Included are example problems to help you practice.