GCSE Physics, Unit 13, Lesson 5 of 8
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The equations: learn, choose and rearrange

GCSE Physics, Required practicals, maths skills and the equations, 25 minutes

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Every GCSE Physics equation in two tables, the ones to learn by heart and the ones given on the sheet, then choosing and rearranging them.

Learn by heart (AQA)

AQA expects you to recall these.

Each comes with its units: put the numbers in using them.

QuantityEquationUnits
weightW = m gN, kg, N/kg
work doneW = F sJ, N, m
force on a springF = k eN, N/m, m
moment (Physics only)M = F dN m, N, m
pressure (Physics only)p = F ÷ APa, N, m²
distances = v tm, m/s, s
accelerationa = Δv ÷ tm/s², m/s, s
resultant forceF = m aN, kg, m/s²
momentum (Higher)p = m vkg m/s, kg, m/s
kinetic energyEk = ½ m v²J, kg, m/s
gain in gravitational potential energyEp = m g hJ, kg, N/kg, m
powerP = E ÷ t and P = W ÷ tW, J, s
efficiencyuseful output ÷ total input (energy or power)no unit, or × 100 for %
wave speedv = f λm/s, Hz, m
chargeQ = I tC, A, s
potential differenceV = I RV, A, Ω
electrical powerP = V I and P = I² RW, V, A, Ω
energy transferredE = P t and E = Q VJ, W, s, C, V
densityρ = m ÷ Vkg/m³, kg, m³

Combined Science (AQA 8464) learners need the same list without the Physics-only rows.

The rest of this lesson and its 8 practice questions are in Plus.

Screen 1 of 4, free to read.

  • 8 exam-style questions, marked as you go, each with a worked solution
  • The Physics Formulas beside every question
  • Anything you get wrong is saved to your flashcards