Physical quantities and units
Use SI base units and check equations for homogeneity. Express values with appropriate significant figures and prefixes (pico to tera).
Illustrated explanations · Worked practiceFree illustrated revision notes
AS & A-Level Physics revision notes.
Edexcel International A-Level Physics notes that connect the mathematics to the physical meaning, from IAS foundations to A2. Read, sketch, explain, then solve.
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AS — Foundations
AS — Mechanics
Kinematics
Define displacement, velocity and acceleration as vectors. Use the four uniform-acceleration (SUVAT) equations.
Illustrated explanations · Worked practiceDynamics
State and apply Newton's three laws of motion. Use F = ma for single bodies and connected systems.
Illustrated explanations · Worked practiceForces, moments and equilibrium
Define and calculate the moment of a force and the torque of a couple. Apply the principle of moments with forces at angles.
Illustrated explanations · Worked practiceWork, energy and power
Define work done: W = Fs cos θ for force at angle θ to displacement. Derive and use KE = ½mv² from the equations of motion.
Illustrated explanations · Worked practiceAS — Materials
Deformation of solids
Distinguish elastic and plastic deformation; identify the elastic limit. Define stress, strain and the Young modulus.
Illustrated explanations · Worked practiceFluids, upthrust and viscosity
Calculate density and the weight of displaced fluid. Separate upthrust from viscous drag.
Illustrated explanations · Worked practiceAS — Waves
AS — Electricity
A2 — Mechanics & fields
Circular motion
Define the radian; convert between degrees and radians. Define angular velocity ω; relate it to period and speed: v = rω.
Illustrated explanations · Worked practiceGravitational fields
Use Newton's law of gravitation: F = GMm/r². Define gravitational field strength g = F/m; use g = GM/r².
Illustrated explanations · Worked practiceOscillations
Define simple harmonic motion: a = −ω²x. Use x = x₀ sin ωt, v = ±ω√(x₀² − x²), and v_max = ωx₀.
Illustrated explanations · Worked practiceA2 — Thermal
A2 — Fields
Electric fields
Use Coulomb's law: F = Qq ÷ 4πε₀r². Define electric field strength E = F/Q; use E = Q ÷ 4πε₀r² for point charges.
Illustrated explanations · Worked practiceCapacitance
Define capacitance C = Q/V for capacitors and isolated conductors. Derive and use the energy stored: W = ½QV = ½CV².
Illustrated explanations · Worked practiceMagnetic fields
Define magnetic flux density B from F = BIL; the tesla. Use F = BIL sin θ for a current-carrying conductor.
Illustrated explanations · Worked practiceElectromagnetic induction
Define magnetic flux Φ = BA and flux linkage NΦ; the weber. State and use Faraday's law: induced e.m.f. = rate of change of flux linkage.
Illustrated explanations · Worked practiceAS — Quantum physics
A2 — Modern physics
A2 — Particles
A2 — Astrophysics
Start with your question. Find your course.
Read a general explanation first, then check the guide for your board and qualification. Each path connects course choices, study methods and practical next steps.
AS Physics and the A-Level transition
Start with general course choices, then follow the Edexcel International AS route for Units 1–3.
Edexcel International A-Level Physics
YPH11: connect AS foundations, A2 models, practical skills and qualification grading.
Use the right specification
These notes target Pearson Edexcel International AS and A-Level Physics (XPH11/YPH11). Use the AS and A2 filters to navigate the course. Practical skills for WPH13 and WPH16 also need dedicated preparation. The library is a revision companion, not a line-by-line syllabus checklist.
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