Math for Physics
The math behind the physics, taught the same way: a live diagram in every lesson, then the rule, then practice. 10 free lessons in 3 modules, plus 8 more in 4 Pro modules. Every lesson ends by showing where physics uses it.
Numbers & Proportion
Fractions, powers and the art of scaling things up and down.
Fractions, Ratios & Percentages
Mix paint and keep the colour exactly right.
12 min50 XPFree preview
Used in Units & Powers of Ten, Position & Velocity, Pressure & Depth and 4 more
Powers & Roots
Double a cube's side and watch its volume jump eightfold.
13 min60 XPFree preview
Used in Units & Powers of Ten, Free Fall, Energy & Its Conservation and 3 more
Direct, Inverse & Square Proportion
Double one thing. Does the other double, halve or quadruple?
13 min60 XP
Used in F = ma, Action & Reaction, Gravity & Orbits and 5 more
Algebra & Graphs
Move letters around, then draw what an equation looks like.
Rearranging Formulas
One formula, every letter: get any of them on its own.
13 min60 XP
Used in Equations Are Balances, F = ma, Energy & Its Conservation and 3 more
Straight Lines & Slope
Tilt a line and read its steepness as a rate.
14 min70 XP
Used in Position & Velocity, Acceleration, Pressure & Depth and 2 more
Parabolas & Quadratics
Shape a parabola, then find where it hits the ground.
15 min70 XP
Used in Free Fall, Projectile Motion
Triangles, Circles & Waves
Right angles, sines and cosines: the geometry inside every arrow and every wave.
Right Triangles & Pythagoras
Squares on the sides of a triangle that always add up.
12 min60 XP
Used in Vectors: Arrows With Meaning, Special Relativity
Sine, Cosine & Tangent
One angle decides the shape of every right triangle.
15 min70 XP
Used in Vectors: Arrows With Meaning, Projectile Motion, Torque & Balance and 2 more
Circles & Radians
Wrap a radius around a circle and count.
13 min60 XP
Used in Springs & Oscillations, Circular Motion, Spinning & Angular Momentum
Sine Waves
Spin a point round a circle and its shadow draws a wave.
14 min70 XP
Used in Springs & Oscillations, Waves, Electromagnetic Induction and 1 more
Growth & Logarithms Pro
Doubling, halving, and the numbers that count zeros.
First Steps in Calculus Pro
Slopes of curves and areas under them: the language Newton invented.
Vectors & Simultaneous Equations Pro
Two unknowns at once, and the two ways to multiply arrows.
Simultaneous Equations
Two lines, one crossing point: find both unknowns at once.
14 min80 XP
Used in Momentum & Collisions
Multiplying Vectors: Dot & Cross
Turn one arrow and watch the shadow and the parallelogram change.
15 min90 XP
Used in Energy & Its Conservation, Torque & Balance, Magnets & Magnetic Forces
Measurement & Data Pro
How sure is a measurement, and how to read a law off a graph of real data.