Physics Fundamentals – Learn, Practice & Master Core Physics Concepts
From classical mechanics and thermodynamics to electromagnetism and modern physics — explore every fundamental concept with clear explanations, solved examples, and interactive practice problems. Your free, all-in-one resource to truly understand how the physical world works.
Physics Fundamentals – Learn, Practice & Master Core Physics Concepts
From classical mechanics and thermodynamics to electromagnetism and modern physics — explore every fundamental concept with clear explanations, solved examples, and interactive practice problems. Your free, all-in-one resource to truly understand how the physical world works.
What 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
The foundation of physics. It explains how objects move, why they stop, and what happens when they collide — from a falling apple to a speeding rocket. If something has mass and moves through space, classical mechanics describes it.
Thermodynamics
The science of heat, energy, and disorder. It answers why ice melts, why engines have limits, and why time only moves in one direction. At its core, it connects the behavior of billions of tiny particles to the world we can actually see and feel.
Waves & Optics
From the light bending through a glass of water to the invisible fields powering your phone, this branch covers how energy travels through space and matter. It’s the physics behind lenses, lasers, radio waves, and everything in between.
Electromagnetism
From electric fields and magnetic forces to radio waves and light itself — electromagnetism explains how energy moves through space and powers the technology that runs the modern world.
Modern Physics
Where classical physics ends, modern physics begins. Explore the revolutionary ideas that reshaped our understanding of the universe — from quantum mechanics and relativity to nuclear physics and particle theory — concepts that power everything from GPS satellites to medical imaging.
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.
Classical Mechanics
Newton’s Second Law
Newton’s Second Law is the equation that runs the universe — F = ma. Push harder, it accelerates more. Make it heavier, it resists more. Three letters, one formula, and suddenly you can predict the motion of everything from falling apples to orbiting planets.
Waves and Optics
Transverse Wave Explained
A transverse wave doesn’t push forward — it shakes sideways. From light traveling across the universe to a guitar string vibrating under your fingers, transverse waves move energy perpendicular to their direction of travel. Understand them, and you unlock the physics behind everything you see and hear.
Thermodynamics
What Is Energy
Energy is the most fundamental concept in physics — a conserved quantity that never changes in an isolated system. This guide covers kinetic energy, potential energy, conservation of energy, Noether’s theorem, E=mc², and every major energy form with clear explanations, formulas, and an interactive simulation.
classical mechanics
Projectile Motion
A ball dropped from rest and one fired sideways from the same height hit the ground at the same time — that’s the key to projectile motion. Horizontal and vertical motions are completely independent, making every problem two simple calculations stacked together.
Waves & Optics.
Wave Speed, Frequency & Wavelength: v = fλ
Every wave follows one elegant equation — v = fλ. Speed equals frequency times wavelength. Increase the frequency and the wavelength shrinks. It’s the simple relationship that connects every wave in the universe, from sound bouncing off walls to light crossing galaxies.
classical mechanics
Conservation of Momentum
Physics fundamentals are precise descriptions of how everything moves, stores energy, and interacts. Every branch of science and engineering builds on these foundations.
Why Physics Fundamentals
The physics education platform
You’ve been waiting for
Most physics resources do one of two things: they drown you in math before you understand what’s happening, or they oversimplify until the real physics disappears. We do neither.
A Full Curriculum, Not Just Articles Classical mechanics, electromagnetism, thermodynamics, waves, modern physics — every major topic, explained with the depth it deserves by physicists who’ve spent years teaching it.
Complete Physics Curriculum
From classical mechanics through electromagnetism to quantum physics — every fundamental concept explained with depth and clarity by working physicists.
Visuals That Do the Heavy Lifting: Vector fields, wave interference patterns, orbital mechanics — some ideas genuinely need a good diagram. Ours are built to make the concept land, not just look pretty.
1,000+ Practice Problems. From quick conceptual checks to multi-step calculations, every problem comes with a full step-by-step solution. You’ll know exactly where your thinking went right and where it went wrong.
Free. Always. Physics education shouldn’t cost a fortune. Every lesson, simulation, and problem set on this platform is completely free and will stay that way.
Hands-On Simulations: Reading about wave interference is one thing. Watching it happen — and being able to change the variables yourself — is something else entirely. Our interactive simulations make abstract physics tangible.
Optics
Incoming
Reflection, Refraction, Diffraction, Lenses
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Coming Soon
Everything You Need to Master Physics — In One Place
Every article, topic, author, and resource — all in one place for easy discovery.
- In-depth lessons covering every core physics topic.
- Interactive simulations and virtual lab experiments.
- 1,000+ practice problems with complete worked solutions
- Video walkthroughs and visual explanations
- Formula sheets and quick-reference study guides.
- Personalised study paths matched to your course.
- Community forums for questions and discussion.
- 100% free — no paywalls, no subscriptions, ever
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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: Physics behind curved trajectories
- Conservation of Momentum
- First Law of Thermodynamics
- Gravitational Force
- Wave Speed, Frequency & Wavelength
- Kinetic Theory of Gases
- Why Is Projectile Motion a Parabola?
Our Authors
Classical Mechanics
Thermodynamics
Astrophysics
Waves and Optics
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Every article, topic, author, and resource — all in one place for easy discovery.
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Making physics accessible, interactive, and genuinely understandable for students at every level.