Topic Cluster

Classical Mechanics

Forces, energy, momentum and motion — the core of classical physics: Newton’s laws, work and energy, collisions, rotation and everyday mechanics.

Classical Mechanics

What Is Terminal Velocity?

Terminal velocity is the steady top speed a falling object reaches when air drag balances its weight. Learn the formula, see worked examples from skydivers to raindrops, and try an interactive lab.

13 min read

Classical Mechanics

What Is Work Done in Physics?

Work done in physics is the energy a force transfers when it moves an object. This guide explains the W = F d cos θ formula with real examples, seven worked problems and an interactive lab.

16 min read

Classical Mechanics

The Kinetic Energy Formula Explained

The kinetic energy formula KE = ½mv² explained in plain English — with units, the work–energy theorem, real-world examples and seven worked problems.

11 min read

Classical Mechanics

Projectile Motion: A Complete Guide

Projectile motion explained simply: learn the range formula R=v²sin(2θ)/g, max height, and time of flight with clear diagrams, worked examples and a free lab.

12 min read

Classical Mechanics

What Is Friction?

Friction is the force that resists sliding between two surfaces. This guide explains what friction is, the f = μN formula, static vs kinetic types, real-world examples, and eight worked problems.

13 min read

Classical Mechanics

Newton’s Second Law of Motion (F = ma)

Newton's second law (F = ma) links force, mass and acceleration. This guide explains it in plain English with worked examples, common mistakes and an interactive lab.

11 min read

Classical Mechanics

Newton’s Laws of Motion Explained

Newton's three laws of motion explain how forces change movement, summed up by F = ma. Learn each law with worked examples, original diagrams, and an interactive force simulator.

12 min read

Classical Mechanics

What Is Energy in Physics?

What is energy in physics? Energy is the capacity to do work, measured in joules. Learn the KE and PE formulas with clear worked examples and diagrams.

11 min read

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