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Specification: AQA A-level Physics (7408) 3.11 Engineering physics option  |  Paper: 3 Section B  |  Data and formulae booklet: given in the exam

Every equation in the Engineering physics option has its own page: key definitions, the equation with units, and 10 ramped questions from core to stretch, each with a full worked solution.

🛒 All the equations in one place: the AQA A-level Every Key Equation PowerPoint has 127 equations, 381 practice questions and 15 derivations for £12.

Rotational dynamics (3.11.1)

• Moment of inertia: I = Σmr² (3.11.1.1)
• Rotational kinetic energy: Eₖ = ½Iω² (3.11.1.2)
• Rotational motion: ω₂ = ω₁ + αt (3.11.1.3)
• Torque: T = Iα (3.11.1.4)
• Angular momentum: Iω (3.11.1.5)
• Work and power: W = Tθ and P = Tω (3.11.1.6)

Thermodynamics and engines (3.11.2)

• First law: Q = ΔU + W (3.11.2.1)
• Non-flow processes: pV^γ = constant and W = pΔV (3.11.2.2)
• Engine cycles: indicated power and P = Tω (3.11.2.4)
• Heat engine efficiency: W/Q_H (3.11.2.5)
• Reversed heat engines: COP (3.11.2.6)

How to use these pages: work every question on paper first. Convert rev min⁻¹ to rad s⁻¹ and revolutions to radians before substituting, use kelvin in every efficiency and COP calculation, and remember W in Q = ΔU + W is the work done by the gas.

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