Embibe Experts Solutions for Exercise 1: EXERCISE 8.1

A metal rod of Young's modulus $2\times {10}^{10} \mathrm{N}/{\mathrm{m}}^2$ undergoes an elastic strain of $0.06\%$. The energy per unit volume of stored (in ${\mathrm{Jm}}^{-3}$) is

A wire of cross-sectional are $A$ and length $L$ is made of a material of Young's modulus $Y$. If the wire stretched by an amount $x$. the work done will be

A wire elongates by $2 \mathrm{mm}$ when a load $W$ is hanged from it. If this wire goes over a pulley and two weights $W$ each are hung at the two ends then elongation in the wire will be