Classical physics = work and energy. This is a solid treatment of the theorems, equations and derivations involved in this most important of classical physics topics. Here we cover kinetic and potential energy, inertia and comprehensive, multi-step solutions to simple physical systems.

Tags: center of mass, energy, equilibrium, inertia, kinetic energy, potential energy, work, Work and Energy Theorem

Pulleys, inclined planes, sliding blocks, friction! This post has it all! We also include a bunch of fully explained examples and introduce Newtonian Gravity and Kepler’s Laws. There’s also a Honeymooners reference for kicks. Leave some comments!

Tags: F=ma, G (gravitational constant), Kepler's Law, kinetic friction, Newton (unit), newtonian gravity, static friction, tension

Kinematics is not actually physics in the truest sense since it only answers the “how” of an arbitrary equation, not the “why” of the system’s behavior. Here’s an overview that includes dimensional analysis and the equations of motion in cartesian, cylindrical and spherical coordinates.

Tags: cylindrical coordinates, dimensional analysis, equations of motion, τ (period), projectile motion, spherical coordinates, uniform cirular motion

What physics web site would be complete without a comprehensive treatment of vectors? Here’s our vector algebra guide including dot, cross and triple products plus a bunch of examples.

Tags: cross product, dot product, scalar triple product, unit coordinate vectors, vector triple product, vectors