The distance of the body from mean position, where the kinetic energy of a particle performing $\mathrm{S}.\mathrm{H}.\mathrm{M}.$ of amplitude $8 \mathrm{mm}$ is three times its potential energy is,
 

Reason: The velocity of the particle executing $\mathrm{SHM}$ is maximum at mean position.

The springs shown in the figure are all up stretched in the beginning when a man starts pulling the block. The man exerts a constant force $F$ on the block.

Suppose a tunnel is dug along a diameter of the earth. A particle is dropped from a point at a distance $h$ directly above the tunnel. The motion of the particle as seen from the earth will be,

The displacement versus time curve for a particle executing SHM is shown in figure. Choose the correct statement(s).