Find Physics Help
Browse topics
Every Grade 11 Physics topic, in plain words — grouped by world. All of them are ready to learn right now.
Kinematics
How fast, which way, and when does it get there?
- Where are you, exactly?ReadyDistance vs displacement, speed vs velocity, and why direction matters — the vocabulary every motion problem is written in.B2.1B3.1B3.2
- Solving motion, both waysReadySolving motion problems with signed directions and the acceleration equations — the core problem-solving skill of the unit.B2.5B2.7
- Graphs don’t lieReadyReading and drawing position–time and velocity–time graphs, deriving the displacement equations, and running motion inquiries.B1.1B1.2B2.2B2.3B2.4B2.6
- Two motions, one clockReadyProjectile motion: splitting a flight into independent horizontal and vertical parts and solving both.B2.8B2.9B3.3
- Two directions at onceReadyAdding vectors at an angle: tail to head, components, bearings like [N30°E], scale diagrams, and relative velocity along a line and across a current.B2.5B2.7
- How physicists actually workReadyThe scientific method as physicists practise it: testable questions, instruments, controlled variables, data tables, significant figures and honest conclusions.A1.1A1.2A1.4A1.5A1.6A1.8A1.10A1.12A1.13
Forces
Why does anything speed up, slow down, or stay put?
- Why things move (or don’t)ReadyIdentifying the forces acting on an object and computing gravity's pull — free-body thinking starts here.C2.1C3.1C3.4
- Newton’s three, appliedReadyNewton's three laws stated and applied, the history from Galileo, and force inquiries with free-body diagrams.C1.1C1.2C2.2C3.2C3.3
- Friction, and the fallReadyFriction priced from the normal force (μ), free-fall calculations, and the inquiry showing what friction depends on.C2.3C2.4C2.5C2.6
Energy
Where does the energy go — and what does it cost?
- Work, power, and where energy hidesReadyWork, power and their units — what it costs to move something, and how fast you pay.D2.1D2.2D2.5D3.2D3.4
- Nothing is ever lostReadyConservation of energy: PE↔KE trades, power measurements, and comparing how Ontario generates electricity.D2.3D2.4D2.6D2.7D3.1D3.5
- Heat, counted honestlyReadyThermal energy quantified: Q = mcΔT, latent heats, calorimetry, heating curves, and conduction/convection/radiation.D2.9D2.10D2.11D3.3D3.7D3.8
- The nucleus pays the billsReadyNuclear physics for society: isotopes, fission vs fusion, radiation safety, half-life, E = mc², and the CANDU story.D1.1D1.2D2.8D3.6D3.9D3.10D3.11D3.12
- Sources, bias, and the people who do physicsReadyResearch skills: finding and citing sources, spotting bias and bad logic — plus physics careers and Canadian contributions.A1.3A1.7A1.9A1.11A2.1A2.2
Waves & Sound
What is a sound, really — and why does it behave like that?
- Two waves walk into each otherReadyWhat a wave is: superposition, transverse vs longitudinal, and the universal wave equation v = fλ.E2.1E2.4E3.1E3.3
- The notes that fitReadyStanding waves and resonance: why instruments play only certain notes, and measuring the speed of sound.E2.2E2.3E2.6E2.7E3.2E3.4
- The stretched sirenReadyThe Doppler effect, why sound's speed belongs to the medium, echolocation, and acoustics in design.E1.1E1.2E2.5E3.5E3.6
Electricity & Magnetism
What's actually moving in a wire?
- The circuit always balancesReadySeries and parallel circuits analysed with Ohm's law and Kirchhoff's laws — voltage, current and resistance.F2.1F2.2
- The field around the wireReadyMagnetic fields mapped and predicted: field lines, the right-hand rules, and electromagnets.F2.4F2.5F3.1F3.2F3.3
- Spin a magnet, light a cityReadyElectromagnetic induction: Faraday's and Lenz's laws, and how motors and generators actually work.F2.7F2.8F3.4F3.5F3.6
- The grid’s clever trickReadyAC vs DC, transformers, transmission losses, electrical safety, and circuit design — the physics of the power grid.F1.1F1.2F2.3F2.6F3.7F3.8F3.9