Explain the following terms: (a) tensile stress; (b)Young’s modulus

Explain the following terms:

(a) tensile stress;

(b)Young’s modulus

Explanation

(a) Tensile stress is the ratio of force  to  cross-sectional area of a wire/rod. It is expressed in Newton per metre squared (Nm(^{-2})) 
                       
(b) Young’s modulus is the ratio of tensile stress to tensile strain. It is expressed in Newton per metre squared. (Nm(^{-2}))   

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