Physics Fundamentals is a free physics education platform built by Mace Johns. We publish interactive calculators, clear concept guides, and solved problems covering every branch of physics — from Newton’s laws to quantum mechanics.
The site launched in 2026 with one goal: make physics genuinely understandable for everyone. No paywalls. No jargon walls. No 700-page textbooks.
Why This Site Exists
Most physics resources fall into two camps. Textbooks that are accurate but dense. And videos that are fun but shallow.
We wanted something in between. Clear enough for a 15-year-old. Rigorous enough for a university student. And interactive — because physics is not a spectator sport.
Physics Fundamentals fills the gap with three things no competitor offers together: 40+ free interactive tools, expert-written concept guides, and exam-specific practice for JEE, AP Physics, GCSE, and NEET.
What Makes Us Different
Tools first, articles second. AI can summarize “what is Newton’s Second Law.” It cannot run a projectile motion calculator for you. Our 40+ interactive tools let you input your own values, see instant results, and build real intuition.
Plain language, then math. Every concept starts with an everyday analogy. Then comes the formula. Then a worked example with real numbers. No formula appears without a human explanation first.
Misconceptions called out. Every guide identifies the most common wrong beliefs students hold. We don’t just teach the right answer — we explain why the wrong answer feels right and where it breaks down.
Short paragraphs, zero filler. No paragraph on this site is longer than three sentences. Every technical term is explained on first use. Active voice. Clean grammar. Written for clarity, not word count.
What We Cover
Physics Fundamentals covers all five major branches of physics:
Classical Mechanics — Newton’s laws, force, mass, acceleration, projectile motion, friction, energy, momentum, torque, gravity, and circular motion. Explore Classical Mechanics →
Waves & Optics — Wave speed, frequency, wavelength, sound, light, refraction, Snell’s law, Doppler effect, lenses, mirrors, standing waves, and the electromagnetic spectrum. Explore Waves & Optics →
Thermodynamics — Heat, temperature, specific heat, conduction, convection, radiation, ideal gas law, entropy, Carnot cycle, and heat engines. Explore Thermodynamics →
Electricity & Magnetism — Electric charge, Coulomb’s law, electric fields, Ohm’s law, circuits, capacitors, magnetic fields, and electromagnetic induction. Explore Electricity & Magnetism →
Modern Physics — Special relativity, time dilation, E = mc², photoelectric effect, de Broglie wavelength, radioactive decay, and quantum mechanics. Explore Modern Physics →
Our Tools
We offer 40+ free interactive calculators and simulators across seven categories:
Mechanics Tools — Projectile Motion, F = ma, Free Body Diagram Builder, Friction, Momentum, Inclined Plane, Centripetal Force, Work & Energy, Torque, and Universal Gravitation calculators.
Waves & Optics Tools — Wave Speed, Snell’s Law, Doppler Effect, Thin Lens, and Standing Wave calculators.
Thermodynamics Tools — Heat Transfer (Q = mcΔT), Ideal Gas Law (PV = nRT), Thermal Expansion, Carnot Efficiency, and Calorimetry calculators.
Electricity & Magnetism Tools — Ohm’s Law, Coulomb’s Law, Series & Parallel Resistor, Capacitance, and RC Circuit calculators.
Modern Physics Tools — Photoelectric Effect, de Broglie Wavelength, Special Relativity, Radioactive Decay, and E = mc² calculators.
Utility Tools — Unit Converter, Significant Figures, Scientific Notation, Dimensional Analysis, Vector Addition, Uncertainty, Constants Table, and Equation Sheet Generator.
Exam Prep Tools — JEE Physics Problem Bank, AP Physics 1 Practice, GCSE Physics Revision, and Physics Quiz Generator.
Who This Is For
High school students preparing for AP Physics, GCSE, A-Level, JEE, or NEET exams.
University students in introductory physics courses looking for clear worked examples.
Self-learners who want to understand how the universe works — no prerequisites needed.
Teachers and tutors looking for tools and explanations to share with students.
Meet the Author
Physics Fundamentals is created and maintained by Mace Johns — a physics educator, EdTech builder, and the founder of this platform.
Every article is researched, written, and reviewed for scientific accuracy and clarity. Every tool is tested against standard physics references before publication.
Contact Us
Have a question, suggestion, or feedback? We’d love to hear from you.