GCSE Physics — interactive lessons
40 lessons covering GCSE 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.
Mechanics18
- 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
- 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
- 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
- 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
Waves3
Thermodynamics6
- 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
- Thermal ExpansionWhy engineers leave gaps in railway tracks — and bridges.20 min
- The Ideal Gas LawWhy a chip bag inflates on a plane — pressure, volume, T.25 min
- Heat TransferConduction, convection, radiation — why metal feels colder than wood.23 min
- Phase TransitionsWhy boiling water stays at 100°C no matter how hard you heat it.25 min
Electromagnetism6
- 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
Optics4
- Reflection and RefractionWhy a straw in water looks bent — and how fibre optics work.22 min
- Lenses and Image FormationHow a magnifying glass, camera, and eye all use the same equation.24 min
- Mirrors and Image FormationWhy your bathroom mirror flips left-right but not up-down.23 min
- Total Internal ReflectionThe angle past which light can't escape water — and how fibre optics exploit it.22 min