Physics - Elasticity Question with Solution | TestHub

A uniform heavy rod of weight$10 \mathrm{kg}{ \mathrm{m} \mathrm{s}}^{-2},$cross-sectional area$100{ \mathrm{cm}}^2$and length$20 \mathrm{cm}$is hanging from a fixed support. Young modulus of the material of the rod is$2\times {10}^{11} \mathrm{N} {\mathrm{m}}^{-2}.$Neglecting the lateral contraction, find the elongation of rod due to its own weight: