Question

Define:-

a) Young modulus of elasticity.

b) Bulk modulus of elasticity.

c) Shear modulus of elasticity​

Answer 1

Answer:

a) Young's modulus is a measure of the ability of a material to withstand changes in length when under lengthwise tension or compression. Sometimes referred to as the modulus of elasticity, Young's modulus is equal to the longitudinal stress divided by the strain.

b) The bulk elastic properties of a material determine how much it will compress under a given amount of external pressure.

c) The shear modulus is a measure of the ability of a material to resist transverse deformations and is a valid index of elastic behaviour only for small deformations, after which the material is able to return to its original configuration

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Answer 2

Explanation:

Young's modulus

a measure of elasticity, equal to the ratio of the stress acting on a substance to the strain produced.

bulk modulus

the relative change in the volume of a body produced by a unit compressive or tensile stress acting uniformly over its surface.

shear modulus or modulus of rigidity, denoted by G, or sometimes S or μ, is defined as the ratio of shear stress to the shear strain: where = shear stress is the force which acts is the area on which the force acts = shear strain.