One idea at a time. A world to discover.
Physics Lessons
for Curious Minds
Clear explanations. Step-by-step examples. Interactive models.
Find the lesson that helps your next idea click.
Stay curious.
Go a little further.
- Find your curriculumIGCSE · A-Level · IB · AP · MYP
- Clear, step-by-step teachingFrom first ideas to deeper understanding
- Practise and applyModels, questions and worked reasoning
- Build real understandingExplore the why, not just the answer
Explore physics topics
Find a concept, build understanding, then put it into practice.
Your lesson results
1467 matching resources · Page 1 of 123
Course filters show reviewed section matches and explicitly released university lessons. A topic link alone does not establish syllabus coverage. Unreviewed school resources remain under general browsing.
Cambridge 9702 Practical Skills: AS Paper 3 and A2 Paper 5
Reading uncertainty: Reviewed Paper 3 written preparation: AS practical 2: instrument stations and defensible uncertainty. Constructed data and original marking guidance do not certify supervised competence. Complete record: Reviewed Paper 3 written preparation: AS practical 3: create the record before measuring. Constructed data and original marking guidance do not certify supervised competence.
Prerequisites: Estimate uncertainty from the measuring process.
Reviewed sections · partial objective coverage; other resources may be unreviewed.
Kinematics 1D Part 1
Motion vocabulary: Reference-point and displacement/distance treatment inspected. Motion vocabulary: Speed and signed velocity are treated as distinct rates.
Prerequisites: Signed changes, elapsed time and rates in one dimension.
Reviewed sections · partial objective coverage; other resources may be unreviewed.
Kinematics 1D Part 2
Motion graph representations: The velocity-time graph shows slope and signed area. Velocity graph area: The graph readout calculates the signed trapezium area and gives its displacement meaning.
Prerequisites: Choose axes and translate motion into position, velocity and acceleration representations.
Reviewed sections · partial objective coverage; other resources may be unreviewed.
Kinematics 2D Advanced
Observer-dependent motion: Observer labels, relative velocities and equal accelerations in constant-relative-velocity frames are explicit. The boat example also contains optional two-dimensional material. Relative velocity on one axis: Observer labels, relative velocities and equal accelerations in constant-relative-velocity frames are explicit. The boat example also contains optional two-dimensional material.
Prerequisites: Name both observers before assigning motion; use ordinary inertial frames.
Reviewed sections · partial objective coverage; other resources may be unreviewed.
Kinematics 2D
Independent projectile components: The horizontal/vertical components model separates constant horizontal velocity from vertical acceleration. Projectile components: The component and trajectory models cover upward-angle and horizontal examples.
Prerequisites: Trigonometry and two motion equations sharing the same elapsed time.
Reviewed sections · partial objective coverage; other resources may be unreviewed.
Kinematics Calculus Integration
Average and instantaneous motion: The shrinking-time-interval laboratory provides the average-to-instantaneous bridge; AP1 uses its visual interpretation only. Average and instantaneous motion: The shrinking-time-interval laboratory provides the average-to-instantaneous bridge; AP1 uses its visual interpretation only.
Prerequisites: Read average rates and shrinking-interval limits visually; formal differentiation is not required in AP1.
Reviewed sections · partial objective coverage; other resources may be unreviewed.
Scalar and Vector Quantities
Scalar/vector distinction: The comparison section classifies quantities by whether direction is needed. Planar vector arithmetic: The component/tip-to-tail model includes a separate reverse-and-add subtraction explanation.
Prerequisites: Magnitude, direction and familiar physical examples.
Reviewed sections · partial objective coverage; other resources may be unreviewed.
Units
Measurement notation: The quantity formula and desk-length example connect the number to its unit. Physical estimation: The section teaches benchmark-based estimation, explicit modelling, sensible rounding and plausibility checks; the bag-lifting example works through estimated energy and power.
Prerequisites: Numbers, units and the meaning of a measured value.
Reviewed sections · partial objective coverage; other resources may be unreviewed.
Applied Definitions
Weight in a field: The weight lab gives mg and explicitly links the field value to acceleration when weight is the only force. Resistive-force behaviour: The section distinguishes sliding friction from fluid drag, defines relative-motion direction and explains the qualitative increase of drag with speed without requiring a particular drag law.
Prerequisites: Relate mass, local field strength and free-fall acceleration.
Reviewed sections · partial objective coverage; other resources may be unreviewed.
Applied, Weight and Normal Forces
Force as an interaction: The force library distinguishes weight, applied force and normal contact force. Scale readings and free fall: The passenger example identifies the scale reading as normal force and explains free-fall apparent weightlessness.
Prerequisites: Identify the interaction partner and whether contact is involved before assigning a force.
Reviewed sections · partial objective coverage; other resources may be unreviewed.
Equilibrium Advanced
Build free-body diagrams for loaded ladders and cable-supported hinged beams, solve force and moment balance, and check whether contact forces, friction and cable tension are feasible. Test the concurrency condition for a body acted on by exactly three non-parallel coplanar forces.
Prerequisites: Free-body diagrams, signed moments, static friction, force components, trigonometry and simultaneous equations.
Alignment not yet reviewed — no syllabus coverage claim.
Equilibrium Calculus Integration
Interaction energy models: The energy-stability section interprets equilibrium through the potential-energy landscape and restoring tendency.
Prerequisites: Obtain force from a potential derivative, classify equilibria, and combine the relevant interaction-energy models with a stated reference zero.
Reviewed sections · partial objective coverage; other resources may be unreviewed.
Featured lessons
Four useful places to start exploring.
Projectile motion
Resolve motion into components and connect trajectories with the equations.
Learning paths
A useful next step, wherever you are starting.
Complete school lesson directory 29 modules · six connected phases
Motion & mechanics
- MotionMeasurement, vectors, kinematics, calculus, and simulation.→
- ForcesInteractions, Newton's laws, statics, gravity, and moments.→
- WorkEnergy transfer, graph area, power, and efficiency.→
- EnergyKinetic and potential stores, conservation, and calculus.→
- MomentumImpulse, conservation, collisions, vectors, calculus, and simulation.→
- Circular MotionRadians, centripetal force, rotation, rolling, angular momentum, and simulation.→
Matter & structures
Charges & circuits
- Electric ChargesCharge, materials, charging methods, Coulomb's law, and superposition.→
- Electric FieldsField strength, field lines, point charges, superposition, and parallel plates.→
- Electric PotentialPotential energy, voltage, equipotentials, field gradients, and capacitors.→
- CircuitsSymbols, current, voltage, resistance, resistivity, series and parallel, and power.→
- Advanced CircuitsKirchhoff's laws, non-ohmic components, sensors, internal resistance, and dividers.→
Waves, light & fields
- WavesSimple harmonic motion, the wave equation, interference, double slits, gratings, standing waves, and Doppler.→
- LightThe ray model, reflection, refraction and Snell’s law, total internal reflection, and dispersion.→
- OpticsCurved mirrors, thin lenses, optical instruments, single-slit resolution, and thin-film colours.→
- MagnetismFields from magnets and currents, the motor effect, and charges circling in magnetic fields.→
- ElectromagnetismMagnetic flux, Faraday’s and Lenz’s laws, generators, and transformers.→
- Electricity & MagnetismCells, internal resistance, the heating effect, electromagnets, and motors.→
Thermal & oscillations
Modern, space & medical
- Atomic PhysicsEnergy levels, radioactivity, half-life, nuclear reactions, and the standard model.→
- QuantumPhotons, matter waves, wave functions, the Bohr model, and the quantum nucleus.→
- Advanced Fission & FusionChain reactions, reactors, fusion, confinement, and radiation safety.→
- Galilean & Special RelativityFrames, Einstein's postulates, time dilation, Lorentz transformations, and spacetime.→
- Space & Stars PhysicsThe Solar System, stellar life cycles, the HR diagram, cosmic distances, and the Big Bang.→
- Medical PhysicsX-rays and CT, ultrasound, nuclear medicine and PET, MRI, and the attenuation calculus.→
Continuing beyond school? Explore University Physics 9 course maps
Build your university pathway
Explore Physics I–V and Quantum Mechanics I–II, plus Advanced Quantum Mechanics and Quantum Field Theory I, or find a specific topic in the university library. These independent course maps are learning guides, not accredited courses or degrees.
How to use the lesson library Access, filters and study tips
What is free?
Look for the “Free lesson” label. Other school lessons need active access. Module directories are open to browse; they are not a promise that every lesson inside is free.
Compare access options →Choose the right depth
Curriculum filters show existing mapped lessons and their modules. A shared lesson can cover more than your syllabus requires: use your course map to check the right depth.
Open the course maps →Make an idea stick
Read an explanation, make a prediction in the model, then try a related problem. Follow the Learn, Explore and Practise links on the cards.
Learn through a physics game →Teaching or revising?
Find downloadable guides and editable presentations alongside the lesson library. Resource availability and access are shown on the destination pages.
Browse classroom presentations →Find lesson files →