InterviewSolution
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InterviewSolution
| 1. |
Define streu 4 strain wwth dimnxien fornula |
| Answer» <p>Stress is defined as force applied on area.</p><p>Mathematically,Stress = Force / Area</p><p>Dimensional Formula of Force= M1L1T-2[Check how Dimensional Formula of force is derived]Dimensional Formula of Area= M0L2T0[Check how Dimensional Formula of area is derived]</p><p>Putting these values in above equation we get,Dimensional Formula of Stress = (M1L1T-2)/(M0L2T0)</p><p>Dimensional Formula of Stress = M1L-1T-2SI unit of Stress is Nm-2</p> <p>Strain is defined as change in dimension over original dimension. Now we know dimension has the units of L thus this means it has no dimensional formula and has no units.</p><p>Strain= Change in dimension/Original dimensionThusDimensional Formula of Strain= (M0L1T0)/(M0L1T0)</p><p>Dimensional Formula of Strain= M0L0T0</p><p>Now we know dimension has the units of L thus same units cancel each other leaving numeric value only. So Strain has no SI unit.</p> | |