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Formula Sheets / Physics

Chapter 11

Mechanical Properties of Solids

Revise with flashcards Download this chapter (PDF) All Physics formulas (PDF)

Stress, strain and elastic moduli Elastic potential energy

Stress, strain and elastic moduli

$Y = \frac{F / A}{Δ L / L},$ $B = - \frac{Δ P}{Δ V / V},$ $η = \frac{F / A}{θ}$
Elongation
$Δ L = \frac{F L}{A Y};$ own weight: $Δ L = \frac{ρ g L ^{2}}{2 Y}$
Poisson's ratio
$σ = - \frac{Δ d / d}{Δ L / L}$
Thermal stress
$\frac{F}{A} = Y α Δ T$
Compressibility
$k = \frac{1}{B}$

Elastic potential energy

$\frac{U}{V} = \frac{1}{2} \times$ stress $\times$ strain $,$ $U = \frac{1}{2} F Δ L$

Gravitation Mechanical Properties of Fluids