Quick answer: This page gathers the 20 lessons of physics grades 9-10 (GCSE · IGCSE · O Level · Class 9-10), one per chapter: SI units, speed and velocity, motion graphs, resultant force, Newton's laws, momentum, work and power, energy efficiency and 12 more. Each lesson gives a quick answer, worked examples, diagrams and key points, with a free PDF download. Written by a team of 12 qualified science teachers.
All the physics grades 9-10 lessons are on this page, chapter by chapter: each lesson gives a quick answer, worked examples and diagrams, with a free PDF download. Back to the physics grades 9-10 overview.
Physics grades 9-10 lessons by chapter
Physics 9-10 lessons
Clear science lessons with diagrams, laws, formulas and worked examples.
Units, prefixes and reliable measurements
Learn SI units, prefixes, standard form, significant figures, precision, accuracy and uncertainty with worked examples for GCSE, IGCSE and Class 9-10.
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How fast and how quickly speeding up
Speed and velocity notes (Physics grades 9-10): learn the difference between speed, velocity and acceleration, with formulas.
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Reading journeys from motion graphs
Motion graphs notes (Physics grades 9-10): learn to read distance-time and velocity-time graphs: gradient as speed and acceleration, area as distance.
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Combining forces and drawing force diagrams
Resultant force notes (Physics grades 9-10): learn types of forces, free-body diagrams, resultant force.
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Inertia, resultant force and reaction pairs
Newton's laws notes (Physics grades 9-10): learn Newton's three laws with definitions, F = ma worked examples, third-law pairs, terminal velocity.
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How momentum is conserved in collisions
Momentum notes (Physics grades 9-10): learn momentum for GCSE, IGCSE and Class 9-10 physics: p = mv, conservation in collisions and explosions.
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Work done, power and mechanical energy
Work and power notes (Physics grades 9-10): learn work done, power, kinetic energy and gravitational potential energy with formulas, worked examples.
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Energy stores, Sankey diagrams and efficiency
Energy efficiency notes (Physics grades 9-10): understand energy stores, transfers, Sankey diagrams and efficiency with worked examples, a worksheet.
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Density, pressure and pressure in liquids
Density and pressure notes (Physics grades 9-10): learn density, pressure and liquid pressure with ρ = m/V, p = F/A and p = ρgh, worked examples.
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Heating, melting and boiling: energy calculations
Specific heat capacity notes (Physics grades 9-10): learn specific heat capacity and latent heat for GCSE and IGCSE: use ΔE = m c Δθ and E = m L.
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Gas pressure, volume and the kelvin scale
Kinetic theory of gases notes (Physics grades 9-10): understand kinetic theory of gases for GCSE and IGCSE: gas pressure, Boyle's law pV = constant.
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Wavelength, frequency and how waves behave
Wave speed notes (Physics grades 9-10): learn wave properties for GCSE and IGCSE: transverse and longitudinal waves, v = f λ, reflection.
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Sound, echoes, ultrasound and hearing
Sound waves notes (Physics grades 9-10): learn about sound waves for GCSE and IGCSE: speed of sound, echoes and sonar.
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Bending light: refraction, critical angle and lenses
Refractive index notes (Physics grades 9-10): learn refraction, refractive index n = sin i ÷ sin r, critical angle.
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Radio waves to gamma rays: uses and risks
Electromagnetic spectrum notes (Physics grades 9-10): learn the electromagnetic spectrum: order, wavelength and frequency, c = f × λ.
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Charge, fields and sparks
Static electricity notes (Physics grades 9-10): learn static electricity: charging by friction, electric fields, sparks and the equation Q = I t.
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Ohm's law and component characteristics
Learn V = I R, I-V graphs for resistors, lamps and diodes, and how thermistors and LDRs work, with worked examples for GCSE and IGCSE physics.
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Circuit rules, power and mains safety
Electrical power notes (Physics grades 9-10): learn the rules for series and parallel circuits, how to use P = IV and P = I²R.
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Magnets, motors, generators and transformers
Electromagnetism notes (Physics grades 9-10): learn magnetic fields, electromagnets, the motor effect F = BIL.
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Unstable nuclei, decay and half-life
Radioactivity notes (Physics grades 9-10): understand alpha, beta and gamma radiation, nuclear decay equations, half-life calculations.
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