Physics - SHM Question with Solution | TestHub

A massless rod is hinged at O . A string carrying a mass m at one end is attached to point A on the rod so that $\mathrm{OA}=\mathrm{a}$. At another point $\mathrm{B}(\mathrm{OB}=\mathrm{b})$ of the rod , a horizontal spring of force constant k is attached as shown. Find the period of small vertical oscillations of mass $m$ around its equilibrium position.