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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, …

High school physics Course challenge Test your knowledge of the skills in this course.

In this video David gives some problem solving strategies for centripetal force problems and explains many common misconceptions people have about centripetal forces.

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

Unit 1: Forces and Newton's laws of motion About this unit For our most up-to-date, mastery-enabled courses, check out High School Physics, AP Physics 1, and AP Physics 2!

David goes through some example problems on the concept of work. By reviewing these, you'll have a better knowledge of how to calculate work done by individual forces on an object in motion.

Here you'll review some of the basics of physics and chemistry, including mechanics, optics, electricity and magnetism, periodicity, and chemical equations, as you prepare to show your physical science …

Check your understanding of scalars and vectors in this set of free practice questions.