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, …

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

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 …

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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 …

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

说实话，很难确切地定义什么是物理。首先，物理学随着我们的进步和新发现而不断变化。新理论不仅带来了新的答案。它们还产生了新的问题，从以前的物理学理论来看，这些问题甚至可能没有意义。这 …

For our most up-to-date, mastery-enabled courses, check out [High School Physics] (https://www.khanacademy.org/science/highschool-physics), [AP Physics 1] …

High school physics 9 units · 50 skills Unit 1 Motion and forces Unit 2 Force pairs and momentum Unit 3 Gravitation