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The IGCSE Physics formula sheet.

A collection of frequently used IGCSE Physics equations, with symbols and SI units. Use it alongside the current specification for your board and exam year; it is a revision aid, not an official formula sheet or a complete syllabus checklist. Practise choosing and rearranging equations as well as recalling them.

IGCSE revision notes

Check the units before substituting: practise physics unit conversions, or work out what a graph gradient means.

Motion

Average speedv = s / ts = distance, t = timem/s
Accelerationa = Δv / tΔv = change in velocitym/s²
Distance (speed-time graph)s = area under graphm

Forces

Resultant forceF = m am = mass, a = accelerationN
WeightW = m guse the value of g supplied in the questionN
Hooke's lawF = k xk = spring constant, x = extensionN
MomentM = F dd = perpendicular distance from pivotN m
Momentump = m vv = velocitykg m/s
ImpulseF t = Δp = mv − muu = initial velocityN s

Density & pressure

Densityρ = m / VV = volumekg/m³
Pressurep = F / AA = areaPa
Liquid pressureΔp = ρ g Δhh = depthPa
Boyle's lawp₁V₁ = p₂V₂constant temperature—

Energy, work & power

Work doneW = F dd = distance moved in force's directionJ
Kinetic energyKE = ½ m v²J
Gravitational PEΔGPE = m g ΔhΔh = vertical height changeJ
PowerP = W / t = E / tW
Efficiencyη = useful out / total in × 100%%

Thermal physics

Thermal energyE = m c Δθc = specific heat capacityJ

Waves

Wave equationv = f λf = frequency, λ = wavelengthm/s
PeriodT = 1 / fs
Refractive indexn = sin i / sin rangles from the normal—
Critical anglesin c = 1 / n—
Echo / sonarv = 2d / td = distance to reflectorm/s

Electricity

CurrentI = Q / tQ = chargeA
Ohm's lawV = I RR = resistanceV
Series resistanceR = R₁ + R₂Ω
Parallel resistance1/R = 1/R₁ + 1/R₂Ω
Electrical powerP = I V = I² RW
Electrical energyE = I V tJ
TransformerVp / Vs = Np / NsN = number of turns—
Ideal transformer powerVp Ip = Vs Is—

From Dr Desouky Physics Academy · About Dr Mohamed Desouky. Source: https://www.drdesouky.com/igcse-physics-formula-sheet.

Need help choosing equations and setting out calculations? Explore IGCSE Physics tutoring for guided question practice and feedback.

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https://www.drdesouky.com/igcse-physics-formula-sheet

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