Classical Mechanics
Conservation of Momentum
When no outside force interferes, the total momentum of a system stays locked in place, which is why rockets fly…
Classical Mechanics
Kinematics
Projectile Motion: The Complete Guide
A thrown ball obeys two simple, independent rules at once, and splitting its motion into horizontal and vertical parts turns…
Classical Mechanics
What Is Energy?
Energy is the universal currency that lets one thing change another, never created or destroyed but endlessly traded between motion,…
Classical Mechanics
Newton’s Second Law: F = ma
The most famous equation in mechanics ties force, mass, and acceleration into a single rule that predicts how every push…
Waves & Optics
Transverse Waves Explained
In a transverse wave the medium shakes sideways while the wave races forward, a simple sideways dance that explains light,…
Classical Mechanics
Newton’s Laws of Motion: All Three Laws Explained
Three short rules from 1687 still govern every car, rocket, and falling apple, turning the chaos of motion into a…