The physics archive contains legacy physics content, and is not being updated with new content. For our most up-to-date, mastery-enabled courses, check out Middle School Physics, High School Physics, …

Learn physics using videos, articles, and NGSS-aligned practice exercises. Explore the fundamentals of motion and forces, non-contact interactions, energy, and waves.

Physics uses simple yet elegant math to describe complex phenomena, from galaxies to biological systems. It's about understanding and predicting the universe's complexity based on simple ideas.

In physics, we love things that are described by sin and cosin, it turns out they're pretty easy to deal with mathematically. Maybe you don't feel that way, but they're much easier than the alternatives of other …

Let's think about what physics is and what topics are covered in an introductory physics course.

Welcome to high school physics! Explore the behavior of the universe including forces and motion, energy, electromagnetism, and light. Explain phenomena from the grand scale of stars and planets …

Overview of key terms, equations, and skills for simple pendulums, including how to analyze the forces on the mass.

Welcome to AP®︎/College Physics 1! In AP Physics 1, you'll learn algebra-based classical mechanics. To make sure you’re prepared with the fundamentals, we recommend completing high school …

Check your understanding of period of simple harmonic oscillators in this set of free practice questions aligned to AP Physics I standards.

There are six simple machines. They are as follows: lever, wheel, pulley, incline plane, wedge and screw. This tutorial will cover the first three. Simple machines can give you a mechanical …