Figure shows the displacement-time graph of a particle executing SHM with a time period $T.$ Four points $1, 2, 3$ and $4$ are marked on the graph where the displacement is half that of the amplitude.

Identify the points of same displacement but with opposite direction of motion. Find the time difference between them.

Figure shows the displacement-time graph of a particle executing SHM with a time period $T.$ Four points $1, 2, 3$ and $4$ are marked on the graph where the displacement is half that of the amplitude.

Identify the points where the particles move in the same direction. Find the time difference between them.

A block is connected with a spring executing SHM with time period $T$ in vertical plane. The amplitude of oscillation is $A.$ Find the time taken by the particle to move from position $y=+\frac{A}{2}$ to $y=-\frac{A}{2}$ in the following situation.

A $20 \mathrm{g}$ particle is oscillating simple harmonically with a period of $2$ second and maximum kinetic energy $2 \mathrm{J}.$ Find, amplitude of oscillation