Kinematics
Vectors and Scalars: Definitions, Examples & Vector Addition
Understanding vectors and scalars is one of the first major steps in learning physics. Every measurable quantity you will work…
Kinematics
Modern Physics
Work-Energy Theorem: Complete Guide with Formula, Derivation, and Examples
The work-energy theorem is one of the most useful shortcuts in classical mechanics. Instead of tracking forces and accelerations at…
Kinematics
Physics Fundamentals: The Complete Guide to Core Concepts, Laws, and Equations
Physics fundamentals are the core principles, laws, forces, and equations that describe how the universe behaves. They include classical mechanics,…
Kinematics
Speed of Light: The Ultimate Guide to c, the Cosmic Speed Limit
Light is the fastest thing in the universe. In just one second, it covers nearly 300,000 kilometers, circles the entire…
Kinematics
v=fλ: The Universal Wave Equation (Wave Speed Formula)
Every wave you’ve ever encountered, the sound of a voice, a ripple across a pond, the light reaching your eyes…
Classical Mechanics
Circular Motion and Centripetal Force
Why does a whirling object keep turning instead of flying off straight? The answer is a force that always points…
Electromagnetism
Ohm’s Law Explained: V = IR
Three letters describe how voltage, current, and resistance dance together in nearly every circuit you will ever build.
Electromagnetism
Electric Charge and Coulomb’s Law Explained
From the crackle of static to the force binding atoms, one simple inverse-square law governs how charges attract and repel.
Classical Mechanics
Simple Harmonic Motion
From a swinging pendulum to a vibrating guitar string, one elegant pattern of back-and-forth motion underlies them all.
Waves & Optics
The Doppler Effect
Why a passing siren drops in pitch and distant galaxies glow redder — both reveal the same simple truth about…