Newton's Three Laws of Motion: The Foundation of Classical Mechanics
Inertia, F = ma, action-reaction pairs — every principle explained from intuition to equation with worked examples.
In-depth guides, interactive simulations, and 1,000+ practice problems — covering everything from Newton's Laws to Quantum Mechanics. Always free.
Deep conceptual understanding first, then mathematics. Every topic built to last.
Newton's Laws, kinematics, projectile motion, circular motion, gravitation, energy, momentum, and rotational dynamics — the backbone of all physics.
What is energy? Kinetic, potential, thermal. The laws of thermodynamics — energy conservation, entropy, and the direction of time itself.
Transverse and longitudinal waves, sound, resonance, interference, the Doppler effect, and why v = fλ governs every wave in the universe.
Electric fields, Coulomb's law, circuits, magnetic forces, Faraday's induction, and Maxwell's equations unifying electricity and magnetism.
Reflection, refraction, Snell's law, lenses, mirrors, diffraction, polarization — and how light reveals the deepest truths of physics.
Special relativity, time dilation, E = mc², quantum mechanics, the uncertainty principle, nuclear physics, and the Standard Model.
Manipulate variables, see outcomes instantly. Physics you can feel.
Launch a projectile and see how angle, speed, and gravity shape the parabolic trajectory in real time. Change variables and watch the physics respond instantly.
Inertia, F = ma, action-reaction pairs — every principle explained from intuition to equation with worked examples.
Range, max height, time of flight. Why 45° maximises range. Common exam mistakes corrected with step-by-step solutions.
The most important concept in all of physics, explained from the ground up. Conservation of energy and why it's never violated.
6,800-word definitive guide. Labeled diagrams, real examples from light to guitar strings, frequency and period derived from scratch.
ΔU = Q − W unpacked completely. Internal energy, heat flow, work done by/on a system — with real-world examples and problems.
Elastic vs inelastic collisions, centre of mass, impulse. Why momentum can never be created or destroyed — and how to prove it.
Every key equation, organized and ready. Click any formula to read the full derivation.
From introductory to advanced — a complete path through physics.
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Every topic starts with the physical "why" before introducing formulas. Understanding first, notation second.
Manipulate variables, observe outcomes, build intuition. Simulations that respond to your input in real time.
Conceptual to multi-step calculation. Every problem has a detailed step-by-step solution you can reveal.
Vector fields, wave interference, orbital mechanics — made clear through carefully designed diagrams and animations.
Every essential equation, organized by topic. Click any formula to read the full derivation and worked examples.
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