About PhysicsLearn

PhysicsLearn is a free study site for AP Physics 1, AP Physics 2, and both AP Physics C courses. Everything works without an account: guides that answer the exact question you searched, calculators that show every step instead of just the final number, and draggable simulations for the ideas that are hard to get from a static page, like projectile trajectories and the moment a block starts to slide.

It exists for two reasons. First, physics has long been the hardest large AP to pass: AP Physics 1 posted a 47.3% pass rate as recently as 2024. College Board rewrote all four course descriptions effective Fall 2024, and the redesigned Physics 1 (Fluids moved in, calculator allowed on both sections) rose to 67.3% in 2025. Most of the web's AP Physics content still describes the old courses; a guide written for the old exam can steer you wrong on the new one. Second, reading about a free-body diagram is not the same as building one. Interaction beats passive review, so every hard idea here has something to drag.

Accuracy is treated as the product. Every page's calculations are independently re-verified before shipping: a second reviewer redoes the math and hunts for errors. Course facts are transcribed from the official College Board course and exam descriptions (Effective Fall 2024), never from memory. If you find a mistake anyway, it will get fixed; a wrong formula on a physics site is a bug, not a typo.

PhysicsLearn was built by Jude Wallis, a high school student, and is part of the Learn Network. From the maker of EconLearn, which the Colorado Department of Education lists in its economics resource bank; StatsLearn applies the same approach to AP Statistics.

Start with the guides, the calculators, or the AP Physics 1 course overview.