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The Edexcel A-Level Physics formula sheet.

A collection of Edexcel International AS and A-Level equations, grouped by topic. Use it alongside the official specification and the formulae supplied for your exam. Practise identifying the right relationship, understanding its conditions and using it in unfamiliar questions.

Edexcel IAL revision notes

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

Mechanics (AS)

SUVATv = u + at · s = ut + ½at² · v² = u² + 2as · s = ½(u+v)tconstant acceleration only—
Newton's second lawF = Δp / Δt = m ap = momentumN
Momentump = m vkg m/s
Moment / torque of coupleM = F d⊥ · τ = F dd⊥ = perpendicular distanceN m
Work at an angleW = F s cos θJ
Kinetic energyEk = ½ m v²J
Gravitational PE (uniform field)ΔEp = m g ΔhJ
PowerP = W / t = F vW

Materials (AS)

Densityρ = m / Vkg/m³
Pressure in a fluidΔp = ρ g ΔhPa
Stressσ = F / APa
Strainε = x / Lx = extension, L = original length—
Young modulusE = σ / ε = FL / AxPa
Strain energyE = ½ F x = ½ k x²linear force–extension relationshipJ

Waves (AS)

Wave equationv = f λm/s
IntensityI ∝ amplitude²W/m²
Double slitλ = a x / Da = slit separation, x = fringe spacingm
Diffraction gratingd sin θ = n λd = 1 / lines per metre—

Electricity (AS)

Current (charge carriers)I = n A v qn = number density, v = drift velocityA
Resistivityρ = R A / LΩ m
E.m.f. & internal resistanceE = I (R + r)r = internal resistanceV
Potential dividerVout = Vin R₂ / (R₁ + R₂)V
PowerP = IV = I²R = V²/RW

Circular motion & oscillations (A2)

Angular velocityω = 2π / T = 2π frad/s
Speed in a circlev = r ωm/s
Centripetal accelerationa = v² / r = r ω²m/s²
Centripetal forceF = m v² / r = m r ω²N
SHM definitiona = −ω² xm/s²
SHM displacementx = x₀ sin(ωt)m
SHM velocityv = ±ω √(x₀² − x²)v_max = ω x₀m/s

Fields (A2)

Gravitational forceF = G M m / r²G = 6.67 × 10⁻¹¹N
Gravitational field strengthg = G M / r²N/kg
Gravitational potentialφ = −G M / rJ/kg
Coulomb's lawF = Q q / 4πε₀r²N
Electric field (point charge)E = Q / 4πε₀r²V/m
Electric field (uniform)E = V / dparallel platesV/m
Electric potentialV = Q / 4πε₀rV

Capacitance & magnetic fields (A2)

CapacitanceC = Q / VF
Energy storedW = ½ Q V = ½ C V²J
Capacitor dischargex = x₀ e^(−t/RC)τ = RC—
Force on a conductorF = B I L sin θB = flux densityN
Force on a moving chargeF = B q v sin θN
Radius of circular pathr = m v / B qm
Magnetic fluxΦ = B A cos θθ = angle between field and area normalWb
Faraday's law|E| = |Δ(NΦ) / Δt|magnitude; direction follows Lenz’s lawV

Thermal (A2)

Thermal energyE = m c ΔθJ
Equation of statep V = n R TT in kelvin—
Kinetic theoryp V = ⅓ N m <c²>—
Mean KE per moleculeE = 3/2 k Tk = 1.38 × 10⁻²³J
First law of thermodynamicsΔU = q + WW = work done on the gasJ

Quantum physics (AS) & nuclear physics (A2)

Photon energyE = h f = h c / λh = 6.63 × 10⁻³⁴J
Photoelectric equationh f = Φ + ½mv²maxΦ = work function—
de Broglie wavelengthλ = h / pp = momentumm
Energy levelsh f = E₁ − E₂J
Mass-energyE = m c²c = 3.0 × 10⁸J
ActivityA = λ Nλ = decay constantBq
Decay lawN = N₀ e^(−λt)—
Half-lifet½ = ln 2 / λs

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

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