A-Level Physics — interactive lessons
57 lessons covering A-Level Physics topics. Every one starts with a simulation you can play with before the equation arrives. Free, no sign-up.
Lessons are matched to topics at the level of the specification, not to a single exam board's numbering — check your own spec for exactly what you'll be examined on.
Mechanics29
- Motion GraphsA sprinter's run is recorded as distance against time. When does she reach top speed, and what is it?20 min
- Free Fall and the Equations of MotionYou drop a stone into a well and hear the splash 2.0 s later. How deep is the well?22 min
- Projectile Motion: the Angle for Maximum RangeWhat launch angle throws the furthest?25 min
- Projectiles from a HeightFrom a clifftop, is 45° still the best angle?20 min
- Hitting a TargetA ball kicked at 16 m/s must land 20 m away. Which angles work?18 min
- Speed and VelocityWhat one number captures how fast something moves.22 min
- Acceleration0 to 30 m/s in 3 s vs 15 s — which is fiercer?24 min
- Acceleration and Motion GraphsHow fast velocity changes — and how one line hides both the rate and the distance.26 min
- Equations of MotionFour equations that crack any constant-acceleration problem.26 min
- Forces and Free-Body DiagramsDraw every force on an object — the core skill of mechanics.20 min
- The Principle of MomentsWhere to sit on a seesaw to balance someone twice your weight.22 min
- Moments & Equilibrium: the Non-Uniform BeamBalance a loaded, non-uniform beam — and find the hidden support forces.24 min
- Equilibrium: Ladders & Hinged BeamsWhy a ladder slips — the friction and forces that keep it standing.26 min
- Newton's First and Second LawsForces, mass, and why trucks take longer to stop.22 min
- Newton's Third LawA truck hits a fly: which pushes harder? (Trick question.)18 min
- FrictionWhy ice is slippery and rubber grips — static vs kinetic friction.22 min
- Forces on a SlopeTilt a ramp steeper and steeper — until the crate lets go.22 min
- Hooke's LawStretch a spring twice as far — force doubles. The simplest rule in mechanics.22 min
- Work and Kinetic EnergyDouble your speed — why does stopping take 4× longer?27 min
- Conservation of EnergyWhy a rollercoaster needs no engine once it crests the first hill.23 min
- Power and EfficiencySame work, half the time — that's double the power.24 min
- Momentum and ImpulseWhy airbags save lives — it's all about time.20 min
- Collisions and Conservation of MomentumCarts crash and stick — where did the energy go?22 min
- Centre of MassWhy a hammer thrown spinning still traces a perfect parabola.24 min
- Circular MotionWhy does water stay in a bucket swung overhead?22 min
- Banked CurvesWhy race tracks tilt their corners — rounding a bend with no friction at all.24 min
- Universal GravitationThe Moon is falling — so why doesn't it hit Earth?20 min
- Simple Harmonic MotionSprings, pendulums, and heartbeats share one equation.22 min
- The PendulumWhy a pendulum keeps time — and why mass doesn't matter.23 min
Waves8
- Wave PropertiesAmplitude, wavelength, frequency — and why they matter.23 min
- Wave SpeedWhy v = fλ — and why a medium fixes the speed.22 min
- Wave InterferenceHow two waves can add to silence — or double the sound.25 min
- DiffractionWhy sound bends around corners but light casts sharp shadows.24 min
- Sound WavesHow vibrations become the music, voices, and noise we hear.18 min
- The Doppler EffectWhy a siren sounds higher as it approaches you.18 min
- Standing Waves & ResonanceWhy guitar strings and organ pipes have a favourite frequency.20 min
- ResonanceWhy a small push at the right frequency can collapse a bridge.22 min
Thermodynamics4
- Temperature and HeatWhy metal feels colder than wood at the same temperature.22 min
- Specific Heat CapacityWhy the sea heats up slower than land — and why that matters for climate.22 min
- The Ideal Gas LawWhy a chip bag inflates on a plane — pressure, volume, T.25 min
- Phase TransitionsWhy boiling water stays at 100°C no matter how hard you heat it.25 min
Electromagnetism8
- Electric Charge & Coulomb's LawWhy rubbing a comb on hair makes it attract paper.22 min
- Electric FieldsThe invisible force field around charges — visualised with field lines.22 min
- Electric Current & Ohm's LawV = IR — and why your charger gets warm.23 min
- Series and Parallel CircuitsWhy one failed bulb kills the whole string — or doesn't.25 min
- Magnetic Fields and ForcesHow a current-carrying wire pushes a magnet across a table.24 min
- Electromagnetic InductionMove a magnet through a coil — electricity appears from motion.26 min
- CapacitorsTwo plates, a gap, and stored energy — how flash cameras and defibrillators work.24 min
- Lenz's LawNature resists change — the induced current always opposes what caused it.24 min
Optics2
Modern Physics6
- The Atomic ModelWhy atoms only emit specific colours of light — never a rainbow.24 min
- Radioactive Decay and Half-LifeRandom events, predictable outcomes — and how we date ancient bones.22 min
- The Photoelectric EffectWhy bright red light ejects no electrons — but dim blue does.25 min
- de Broglie WavesEvery moving particle has a wavelength — even you, but far too small to notice.26 min
- The Double-Slit ExperimentOne electron at a time, arriving as single dots that pile up into interference.26 min
- Nuclear Fission and FusionSplitting atoms powers reactors; fusing them powers stars.27 min