30m लंबे एक तार जिसका परिच्छेद का क्षेत्रफल 25 sq mm है उसे 5kg भार से 0.49 cm फैला दिया गया तो (a.) longitudinal stress (b.) longitudinal strain (c.) उस तार के पदार्थ का Young's modulus बताओ ।
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●a) Longitudinal stress = Force/Area = 5g / 25mm^2 = 2×10^6 N/m^2
●b) Longitudinal strain =change in lenth/original length = 0.49cm/ 30m = 49/3× 10^-5 = 16.3× 10^-5
●c) Young's modulus = Longitudinal Stress/ Longitudinal Strain = 2×10^6/16.3×10^-5 = 1.22×10^10 N/m^2
hope this will help you
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