The Physics Question Bank

Specification: AQA A-level Physics (7408) 3.4 Mechanics and materials  |  Paper: 1 (and 2 as assumed knowledge)  |  Data and formulae booklet: given in the exam

Every equation in section 3.4 has its own page: key definitions, the equation with units, and 10 ramped questions from core to stretch, each with a full worked solution. The equations are in the data and formulae booklet, so the skill is choosing the right one, rearranging it and getting the units right.

🛒 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.

Forces and motion (3.4.1)

• Moments: moment = Fd (3.4.1.2)
• Uniform acceleration: v = u + at (3.4.1.3)
• Uniform acceleration: s = ½(u + v)t (3.4.1.3)
• Uniform acceleration: s = ut + ½at² (3.4.1.3)
• Uniform acceleration: v² = u² + 2as (3.4.1.3)
• Projectile motion (3.4.1.4)
• Newton’s second law: F = ma (3.4.1.5)
• Momentum: p = mv and F = Δ(mv)/Δt (3.4.1.6)
• Impulse: FΔt = Δ(mv) (3.4.1.6)
• Work done: W = Fs cos θ (3.4.1.7)
• Power: P = ΔW/Δt and P = Fv (3.4.1.7)
• Efficiency (3.4.1.7)
• Conservation of energy: Eₖ = ½mv² and ΔEₚ = mgΔh (3.4.1.8)

Materials (3.4.2)

• Density: ρ = m/V (3.4.2.1)
• Hooke’s law: F = kΔL (3.4.2.1)
• Elastic strain energy: E = ½FΔL (3.4.2.1)
• Stress, strain and the Young modulus (3.4.2.2)

How to use these pages: work every question on paper first, then open the solution. Write the equation, substitute with units, rearrange, and give the answer with a unit and a sensible number of significant figures. Examiners name careless suvat sign errors and unit slips year after year.

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