IB DP Physics · SL and HL · Free
Learn physics by doing
Short lessons you can do alone: read one idea, predict, test it in a simulation, then check yourself. Built class by class from our own classroom notes.
Welcome to Physics · Class 1 · Intro to Physics
0 Preface to the syllabus
Before any equation: what physics studies, what "measurable" means, the units everything is built from, what makes things move, and the map of the whole course.
- 0.1What is physics?Matter, energy, and how they interact.SL+HLEasier12 minFree
- 0.2Can it be measured?Physical quantities, ratings, scalars and vectors.SL+HLEasier12 minFree
- 0.3The seven base unitsThe units that every other unit is built from.SL+HLEasier10 minFree
- 0.4Prefixes: kilo to femtoOne word in front of a unit that says how big or small.SL+HLEasier8 minFree
- 0.5Derived unitsArea, speed, acceleration, force and pressure, all built from base units.SL+HLMedium12 minFree
- 0.6Converting unitsWorked examples, then practise with fresh numbers.SL+HLMedium15 minFree
- 0.7What makes things move?Unbalanced forces and the four fundamental forces.SL+HLMedium14 minFree
- 0.8The map: themes and assessmentThe five themes and how you are assessed.SL+HLEasier8 minFree
Theme A · Space, time and motion · Class 2 · 1D Motion
A.1 Kinematics: describing motion
Start with the best question you can ask about motion, see how repetition gave us clocks, meet an ancient paradox, and model motion yourself.
- A.1 · 1Motion or rest?Ask a good question: with respect to what?SL+HLEasier12 minFree
- A.1 · 2Repeating motion and the birth of clocksHow repetition gave us a way to measure time.SL+HLMedium14 minFree
- A.1 · 3Zeno: is all motion an illusion?An ancient paradox, settled by a series that adds to a finite number.SL+HLMedium12 minFree
- A.1 · 4Model 1D motion: Y = vtTurn "changing position with time" into a model, then animate it.SL+HLMedium15 minFree