Physics - Elasticity Question with Solution | TestHub

A string of area of cross-section$4 {\mathrm{mm}}^2$and length$0.5$is connected with a rigid body of mass$2 \mathrm{kg}$. The body is rotated in a vertical circular path of radius$0.5 \mathrm{m}$. The body acquires a speed of$5 \mathrm{m} {\mathrm{s}}^{-1}$at the bottom of the circular path. Strain produced in the string when the body is at the bottom of the circle is _____$\times {10}^{-5}$. (Use Young's modulus${10}^{11} \mathrm{N} {\mathrm{m}}^{-2}$and$g=10 \mathrm{m} {\mathrm{s}}^{-2}$)