QJEEM22Phea96: JEE Main 2022 Physics - Class 11 JEEM22Phea96 Solution: A string of area of cross-section 4   mm 2 and length 0.5…

A string of area of cross-section $$4{\mathrm{mm}}^2$$ and length $$0.5\mathrm{m}$$ 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 $$5\mathrm{m}/\mathrm{s}$$ 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 $$\mathrm{g}=10\mathrm{m}/{\mathrm{s}}^2$$)