Discover what Simple Harmonic Motion (SHM) really means without the confusing physics jargon. This easy-to-follow guide breaks down the core definitions, essential formulas for springs and pendulums, and real-world examples—from how quartz watches keep time to why bridges collapse.
Throw anything and it traces a parabola, every time. Learn exactly why projectile motion creates this shape, with formulas, real examples, and simulations.
Newton’s three laws of motion are the foundation of classical mechanics — every push, pull, and collision follows them. From why objects resist change to how forces always come in pairs, these laws explain how everything moves and why. Clear explanations, real-world examples, and key formulas include
Every object with mass pulls on every other object with mass — and one equation describes all of it. Newton’s law of universal gravitation, F = Gm₁m₂/r², governs everything from a falling apple to the orbit of the Moon. The force is always attractive, follows an inverse-square law, and scales with both masses. It took over a century after Newton to even measure the gravitational constant G, and scientists still only know it to about five significant figures.
Momentum is always conserved — in every collision, explosion, and rocket launch. Learn what momentum is, how the law of conservation works, the difference between elastic and inelastic collisions, and why airbags save lives through the impulse-momentum theorem, all with clear examples and solved problems.
Throw a ball, kick a football, fire a cannon — they all trace the same parabolic arc once they leave your hand. The secret to projectile motion is that horizontal and vertical are completely independent. Gravity pulls downward and doesn’t touch horizontal speed. A ball dropped from rest and a ball fired sideways from the same height hit the ground at exactly the same time. Master that independence, and every projectile problem becomes two simple one-dimensional problems stacked together.
Newton’s Second Law (F = ma): The One Equation That Runs Everything If physics had a greatest hit, it’d be F = ma. Three letters, one equation, and it runs basically everything — from the arc of a thrown ball to the orbit of the Moon, from the crash testing of a car to the…
Learn how to solve projectile motion problems step by step. Simple English explanations with real examples covering height, range, flight time, and launch angles.
Kinematics is the foundation of all mechanics. Learn what displacement, velocity and acceleration really mean, how they differ from distance and speed, and how the five SUVAT equations let you solve any problem involving motion under constant acceleration.
An object moving in a circle at constant speed is still accelerating. Learn why, what centripetal acceleration and centripetal force are, how to calculate them, and where circular motion appears in everything from satellites to washing machines.
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