Question

Define Young’s modulus, Bulk modulus and modulus of rigidity.

Answer 1

Answer:

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

The bulk modulus:  ( or ) of a substance is a measure of how resistant to compression that substance is. It is defined as the ratio of the infinitesimal pressure increase to the resulting relative decrease of the volume.

Modulus of rigidity: or  shear modulus 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