Start here
Where are you, exactly?
Distance says how far. Displacement and velocity also say which way.
How do we describe motion? Where this sits in the course
Step inFive worlds, straight from the course
KinematicsHow do we describe motion?6 lessons · 3 to playForcesWhy does motion change?3 lessons · 2 to playEnergyWhere does the ability to make change go?5 lessons · 2 to playWaves & SoundHow can a pattern carry energy and information?3 lessons · 1 to playElectricity & MagnetismHow do charges, fields and changing fields make circuits and machines work?4 lessons · 2 to play
The play corner
Games and labs record nothing. They exist because physics is fun.
GameCannonball GolfOne slider, one shot — land the ball on the green with pure projectile mathGameNet Force JudgeEight situations with numbers that change every play — name the net force and what it doesGameEnergy LedgerA dropped ball, a braking car, a kettle — say where the energy went, and how muchGameWave DetectiveThunder, echoes, a passing siren, two forks that beat — explain each clue with v = fλ and a mediumGameThe Amp ExchangeHit exact current and power targets — Ohm and Kirchhoff as a puzzle
100 of 100 course expectations are taught here — computed from the same ledger our tests pin, and it only grows when a journey genuinely teaches something new.