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When an elastic material with Youngs modulus Y is subjected to stretching stress S, elastic energy stored per unit volume of the material is  

        (a)    YS/2

        (b)    S2Y/2

        (c)    S2/2Y        

        (d)    S/2Y

Hrishant Goswami , 11 Years ago
Grade 10
anser 1 Answers
Amit Saxena

Last Activity: 11 Years ago

(c)
Energy stored per unit volume
    =  1/2×  stress×  strain
    =  1/2×  stress× (stress/Young''s modulus)    
    =1/2×(stress)^2/((Young^'' s modulus) )=S^2/(2 Y)

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