Physics - SHM Question with Solution | TestHub

A highly rigid cubical block$\mathrm{A}$of small mass$M$and side$L$is fixed rigidly on to another cubical block$\mathrm{B}$of the same dimensions and of low modulus of rigidity$\eta$such that the lower face of$\mathrm{A}$completely covers the upper face of$\mathrm{B}$. The lower face of$\mathrm{B}$is rigidly held on a horizontal surface. A small force$F$is applied perpendicular to one of the side faces of$\mathrm{A}$. After the force is withdrawn, block$\mathrm{A}$executes small oscillations, the time period of which is given by