Mechanical Properties of Matter
Solid elasticity, Hooke’s law, Young’s modulus, fluid viscosity, Stokes’ law, Poiseuille flow, surface tension, and capillary action.
Mechanical Properties of Matter — Lessons (6)
Elasticity of Solids & Young’s Modulus
Master tensile stress σ = F/A, tensile strain ε = ΔL/L, Hooke’s law, stress-strain curves for ductile, brittle, and polymeric materials, Young’s modulus Y = (FL)/(AΔL), and strain energy density u = 0.5 Y ε².
Viscosity of Fluids & Stokes’ Law
Investigate internal fluid friction, Newton’s viscosity law F = η A (dv/dx), dynamic viscosity coefficient η, streamline and turbulent flow, Poiseuille’s pipe flow formula Q = (π P r⁴)/(8 η L), Stokes’ drag F_d = 6πηrv, and terminal velocity v_t.
Surface Tension & Capillary Action
Master intermolecular cohesion, surface energy, surface tension γ = F/L, excess pressure inside drops ΔP = 2γ/R and soap bubbles ΔP = 4γ/R, contact angle θ, and Jurin’s capillary rise law h = (2γ cosθ)/(ρ g r).
Mechanical Properties of Matter Practicals Hub
Complete interactive investigations for all 4 official NIE A/L Physics syllabus practicals: Searle’s wire Young’s modulus (Exp 14), Stokes’ falling sphere viscosity (Exp 15), Capillary tube surface tension (Exp 16), and Microscope slide surface tension (Exp 17).
Interactive Materials & Fluid Dynamics Simulation Lab
60fps multi-mode laboratory simulator: Mode 1 Searle’s wire elasticity with spirit level deflection; Mode 2 Stokes’ viscometer falling sphere with real-time vector drag tracking; Mode 3 Capillary tube rise and meniscus curvature.
Unit 10 Assessment: Mechanical Properties of Matter
Comprehensive summative evaluation covering all 3 syllabus competencies: solid elasticity & Young’s modulus, fluid viscosity & Stokes’ law, and surface tension & capillary action.