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InterviewSolution
| 1. |
Within elastic limit prove that young modulus of a material is the stress required to double the length of wire. |
| Answer» <p>Let the elastic law be stress = E * strain</p><p>initially, strain =0, so stress is 0.</p><p>Strain = change in length/ original length</p><p>so double length means strain = (2L-L)/L = 1</p><p>therefore, stress = 1*E</p><p>The modulus = stress/1 = stress</p><p>Therefore modulus is the stress required to double the length </p> | |