
A rod of length rests on a smooth horizontal floor. If the rod is heated from , find the longitudinal strain developed ().


Important Questions on Elasticity




Two wires are made of the same material and have the same volume. The first wire has cross-sectional area and the second wire has cross-sectional area . If the length of the first wire is increased by on applying a force how much force is needed to stretch the second wire by the same amount?

A string is stretched between two fixed points separated by It is observed to have resonant frequencies of There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this string is :

In determining Young’s modulus of elasticity of wire, a force is applied and extension is recorded. Initial length of wire is . The curve between extension and stress is depicted. Then, Young’s modulus of wire will be,

