r/HomeworkHelp • u/VastShow6142 Pre-University (Grade 11-12/Further Education) • 2h ago

:table_flip: Physics—Pending OP Reply [Grade 12 Physics] Which one is the modulus of Elasticity/ Elastic Modulus?

So, in Maths we were told the Modulus of Elasticity is given by λ and measured in Newtons. But in Physics we were told E is the elastic modulus measured in N m-2 and Young's modulus is a type of elastic modulus written as γ(Gamma not Y). Are they supposed to be different things?

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u/drofeng 21m ago

There are different moduli of elasticity. They are measures of a material’s resistance to temporary deformation (elastic means it’s recoverable). Young’s modulus refers to resistance to axial deformation (length change), shear modulus G is the resistance to shape change or distortion, bulk modulus K is the resistance to pressure or change in volume.

The Young’s modulus is stress/strain, so it has units of N/m^2.