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, …

Physics is built on a foundation of math and it seeks to explain all phenomena in the universe. It forms the basis for other sciences like chemistry and biology. Physics uses simple yet elegant math to …

Aug 18, 2025 · Explore Khan Academy’s updated AP Physics 1 and NGSS-aligned Middle School Physics courses, featuring new videos, interactive practice, and hands-on activities to support …

Let's explore the mysteries of light and electricity. From how light reflects, to correcting defects in our eyes. From understanding charges to lighting up cities. From Newton's prism to Faraday's generator, …

Let's solve some problems to better understand the behavior of forces that act on objects, and their effects on motion. In the process, we will clear some common misconceptions.

This course has been deprecated. We recommend exploring our improved High School Physics, AP Physics 1, and AP Physics 2 courses instead.

Chapitre 18 : Révisions : AP Physics 1 exam (US) AP Physics 1 : Résumé de cours AP Physics 1 : Corrigé des épreuves 2015

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

In the physics sense, you are doing no work on the book. However, even if you don't have a book in your hand, if you twist side to side, your muscles get warm and you release energy.

In everyday language people use the word deceleration to describe slowing down. But in physics, we use the single term acceleration to mean any change in velocity, whether it be speeding up, slowing …