Newton's Laws of Motion
The three laws governing every force and acceleration. Foundation of all classical mechanics — from billiard balls to rocket trajectories.
Read the guide →51 free articles · 20 calculators · 10 games
Master Physics Fundamentals Through Interactive Learning
From Newton's laws and energy conservation to transverse waves and quantum mechanics — a free, comprehensive physics education platform built to make every concept click.
Free forever — no account, no paywall, no login required
Core Concepts
The laws that run our universe
Physics fundamentals are precise descriptions of how everything moves, stores energy, and interacts. Every branch of science and engineering builds on these foundations.
Transverse Waves Explained
Definition, labeled diagram, wavelength, amplitude, frequency, polarization — with real examples from light to guitar strings. 6,800 words.
Read the guide →What Is Energy?
Kinetic, potential, and thermal energy explained. The conservation of energy law and why it is the most important principle in all of physics.
Read the guide →Projectile Motion
Range, max height, time of flight equations with full worked examples. Why 45° maximises range and common exam mistakes corrected.
Read the guide →Wave Speed, Frequency & Wavelength
The universal wave equation v = fλ explained from first principles. From sound waves to light — worked examples and Doppler effect.
Read the guide →Conservation of Momentum
The principle behind every collision. Elastic vs inelastic collisions, centre of mass, worked examples, and why momentum never disappears.
Read the guide →Why Physics Fundamentals
The physics education platform
you've been waiting for
More than a website — a complete learning environment where physics fundamentals become intuitive through interaction, not memorization.
⚛
Complete Physics Curriculum
From classical mechanics through electromagnetism to quantum physics — every fundamental concept explained with depth and clarity by working physicists.
🔬
Interactive Simulations
Manipulate variables, observe outcomes, build intuition. Our physics games let you experiment in ways a textbook never could.
🧮
20 Free Calculators
From projectile motion to Ohm's Law, every calculator shows the formula, the worked substitution, and the final answer — not just a number.
🎯
Conceptual Understanding First
We don't just hand you formulas. Every topic starts with the physical intuition — the 'why' — before introducing the mathematics.
📊
Visual Explanations
Complex ideas like vector fields, wave interference, and orbital mechanics become clear through carefully designed diagrams and animations.
🌍
Free & Accessible
Quality physics education should never sit behind a paywall. Every article, calculator, and game we build is completely free.
Comprehensive Curriculum
Every branch of physics,
explained from the ground up
Our curriculum covers all physics fundamentals — from the classical mechanics of Newton to the strange world of quantum theory. Each topic is built for genuine understanding, not exam prep alone.
Classical Mechanics
LiveNewton's Laws, Kinematics, Forces, Momentum, Energy
Thermodynamics
LiveConservation Laws, Heat Transfer, Entropy, Gas Laws
Waves & Optics
LiveTransverse Waves, Sound, Light, Interference, Doppler
Electromagnetism
LiveElectric Fields, Circuits, Ohm's Law, Magnetic Forces
Modern Physics
LiveSpecial Relativity, Quantum Mechanics, Nuclear, Radioactivity
Kinematics
LiveSUVAT Equations, Velocity, Acceleration, Graphs of Motion
Available now
Everything you need to master
physics fundamentals
In-depth lessons across all core physics topics
Interactive simulations and physics games
20 calculators with step-by-step worked solutions
Clear diagrams and visual explanations throughout
Organised study paths by topic and category
Step-by-step solutions for every example problem
100% free — no account or paywall, ever
Latest Articles
Start learning now
Classical Mechanics
14 min read
Circular Motion and Centripetal Force: Formula, Charged Particles & Worked Examples
Physics Fundamentals Editorial Team
Electromagnetism
13 min read
Ohm's Law V = IR: Formula, Circuits, Power & 4 Worked Examples
Physics Fundamentals Editorial Team
Electromagnetism
14 min read
Electric Charge and Coulomb's Law: F = kq₁q₂/r² Explained
Physics Fundamentals Editorial Team
Classical Mechanics
15 min read
Simple Harmonic Motion: x = A cos(ωt), Period & Energy — Full Guide
Physics Fundamentals Editorial Team
Waves & Optics
13 min read
The Doppler Effect: Formula, Examples & Applications — Sound, Light & Radar
Physics Fundamentals Editorial Team
Thermodynamics
14 min read
Ideal Gas Law PV = nRT: What R Is, Derivation & 4 Worked Examples
Physics Fundamentals Editorial TeamWhat Are Physics Fundamentals?
Physics fundamentals are the core laws and principles describing how the universe behaves at every scale. Mastering them is the single most effective investment any science or engineering student can make.
Classical Mechanics
Classical mechanics begins with Newton's three laws. The first establishes inertia. The second (F = ma) quantifies how force produces acceleration. The third explains action–reaction pairs. Together they predict projectile trajectories, satellite orbits, and forces in every engineered structure.
All Mechanics Articles →Waves & Optics
Wave physics governs how energy propagates. Transverse waves — oscillation perpendicular to propagation — include all electromagnetic radiation. The wave equation v = fλ connects speed, frequency, and wavelength for every wave type in the universe.
All Waves Articles →Energy & Thermodynamics
Energy is the central concept connecting all physics. Conservation of energy — it cannot be created or destroyed, only transformed — is one of the deepest truths in science. The first law of thermodynamics applies this to heat and work. The kinetic theory of gases links molecular motion to pressure.
All Thermodynamics Articles →Forces & Conservation Laws
Conservation laws are the deepest principles in physics. Conservation of momentum governs every collision. Newton's law of gravitation describes the force between any two masses — from dropping a ball to the orbit of the Moon. These are exact laws with no known exceptions.
All Articles →100+ physics learners already inside
Physics that actually
clicks.
Concise, insight-driven updates when we publish something worth reading — a new article, calculator, or tool. No filler. No noise. Just the good stuff.
Free forever · No spam · Unsubscribe in one click
or
Join on WhatsApp
Quick bites of physics — no number shared, ever
Your number is never visible to other members · Channel broadcast only
Explore
Everything on Physics Fundamentals
Every article, topic, author, and resource — all in one place for easy discovery.
All Articles
- Newton's Laws of Motion
- Newton's Second Law (F=ma)
- Transverse Waves Explained
- What Is Energy?
- Projectile Motion: Complete Guide
- Conservation of Momentum
- First Law of Thermodynamics
- Gravitational Force
- Wave Speed, Frequency & Wavelength
- Kinetic Theory of Gases
- Why Is Projectile Motion a Parabola?
- Kinetic Energy: KE = ½mv²
- Longitudinal Waves Explained
- Velocity vs Speed
- Work Done in Physics
- Acceleration in Physics
- The Electromagnetic Spectrum
- The Doppler Effect
- Simple Harmonic Motion
- Ohm's Law: V = IR
- Circular Motion & Centripetal Force
- Friction Force Explained
- Free Fall & Terminal Velocity
- Hooke's Law and Springs
- Specific Heat Capacity
- Electric Charge & Coulomb's Law
- Power in Physics
- Torque in Physics
- Second Law of Thermodynamics
- Special Relativity Explained
- Ideal Gas Law: PV = nRT
- Newton's Law of Universal Gravitation
- Momentum and Impulse
- Reflection and Refraction
- Electric Field and Potential
- Magnetic Fields and Forces
- Electromagnetic Induction
- Wave-Particle Duality
- The Photoelectric Effect
- Nuclear Fission and Fusion
- Entropy Explained
- Radioactive Decay
- SUVAT Equations
- Heat Transfer: Conduction, Convection, Radiation
- Young's Double-Slit Experiment
- Angular Momentum
- Normal Force Explained
- Tension Force
- Centre of Mass
- Heisenberg Uncertainty Principle
- The Speed of Light
Frequently Asked Questions
Common questions about physics fundamentals
What are the fundamentals of physics?
The fundamentals of physics encompass the core principles governing how the universe works: classical mechanics (Newton's laws, motion, forces, energy), thermodynamics (heat and entropy), electromagnetism (electric and magnetic fields), waves and optics (light and sound behavior), and modern physics (quantum mechanics and relativity). These branches form the foundation for understanding everything from how a ball rolls down a ramp to how stars generate energy through nuclear fusion.
Is Physics Fundamentals really free?
Yes, Physics Fundamentals is completely free and always will be. We believe quality physics education should be accessible to every student regardless of financial circumstances. All lessons, simulations, practice problems, and study guides are available at no cost.
Who creates the content on Physics Fundamentals?
Our content is developed by physicists and experienced educators who hold advanced degrees in physics and related fields. Every article, simulation, and problem set undergoes rigorous review to ensure scientific accuracy and pedagogical effectiveness.
What topics does Physics Fundamentals cover?
We cover the full spectrum of introductory to intermediate physics: kinematics, Newton's laws, energy and momentum, rotational dynamics, thermodynamics, fluid mechanics, transverse and longitudinal waves, sound, optics, electricity, magnetism, circuits, and modern physics including special relativity, quantum mechanics, nuclear physics, and radioactive decay.
How is Physics Fundamentals different from a textbook?
Unlike a traditional textbook, Physics Fundamentals emphasizes conceptual understanding through interactive simulations, step-by-step visual explanations, and immediate feedback on practice problems. We prioritize building physical intuition before introducing mathematical formalism, which research shows leads to deeper and more lasting comprehension.
What is the best way to learn physics fundamentals?
The most effective approach combines conceptual understanding with mathematical practice. Start by grasping the physical intuition behind each concept before memorizing equations. Work through solved examples, then attempt problems independently. Use visual aids and simulations to build spatial and quantitative intuition. Consistency matters more than intensity: short daily sessions outperform cramming.