PHY 103 Lab

An interactive study site for PHY 103 (calculus-based mechanics and waves), part of Princeton Labs. The modules follow the course week by week. Each has a live simulation, a worked example, common mistakes and a quiz, plus practice problems, "Which principle?", exam review for midterms and finals, a mistakes queue and a Key formulas page.

Unofficial study aid. Not affiliated with, reviewed by, or endorsed by Princeton University or its Physics Department. Use it to study, not on graded work, and follow the course's collaboration rules.

Editing

index.html is the whole site (one file, no build step). Edit it directly, then run the checks:

python3 tools/check.py
NODE_PATH=$(npm root -g) node tests/check.js

See CLAUDE.md for the rules.

Privacy

Progress is saved only in your browser (keys start with phy-). Nothing is counted or tracked. See the Privacy policy and Terms of use.

Reporting a problem

The Report an issue link opens a pre-filled issue in this repo. Issues are public, so don't include personal information.

© 2026 Jiarui Li. All rights reserved.