Formula sheets, a comprehensive glossary, structured study plans, and hundreds of practice problems. All free, all designed to work together.
These free physics resources are the reference material that sits behind the explainers: a formula sheet you can scan by topic, an A–Z glossary of terms, study plans that sequence the topics in a sensible order, and worked practice problems. Nothing here is gated, and every entry links through to the calculator or interactive lab that lets you test it with your own numbers.
The essential formulas across every topic, organized so you can find what you need fast. The full version is available as a downloadable PDF.
| Concept | Formula | Topic |
|---|---|---|
| Newton's Second Law | F = ma | Mechanics |
| Kinetic Energy | KE = ½mv² | Mechanics |
| Projectile Range | R = v²sin(2θ)/g | Mechanics |
| Pendulum Period | T = 2π√(L/g) | Waves |
| Wave Speed | v = fλ | Waves |
| Ohm's Law | V = IR | Electromagnetism |
| Coulomb's Law | F = kq1q2/r² | Electromagnetism |
| Specific Heat | Q = mcΔT | Thermodynamics |
| Universal Gravitation | F = Gm1m2/r² | Mechanics |
Clear, jargon-free definitions of the most important physics terms. Each links to a full article when you want to go deeper. A sample is below — the full glossary covers the key terms across every topic.
Structured roadmaps for learning physics from scratch. Pick the timeline that fits your schedule.
You can't learn physics without solving problems. We have 200+ problems with complete step-by-step solutions, sorted by topic and difficulty. Every article on the site ends with its own problem set.
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