The motion of a body along the same path is called oscillatory motion. (To-and-fro / Static)

A mass $m$ is suspended by means of two coiled springs which have the same length in unstretched condition, as shown in figure. Their force constants are $k_1$ and $k_2$, respectively. When set into vertical vibrations, the period will be

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 After the force is withdrawn, block $A$ executes small oscillations, the time-period of which is given by

A particle is undergoing simple harmonic motion. The graph shows variation of velocity of particle with its position from mean position. The frequency of simple harmonic motion is,

A wooden Cube (density of wood d) of side $1$ floats in a liquid of density $\rho$ with its upper and lower surfaces horizontal. If the cube is pushed slightly down and released, it performs simple harmonic motion of period $T$, then $T$ is given by

In the figure shown, the time period and the amplitude, respectively, when mass $m$ is released from rest and when the spring is relaxed are (The inclined plane is smooth)