Displacement versus time curve for a particle executing S.H.M. is shown in figure .Identidy the points marked at which (i) velocity of the oscillator is zero, (ii) speed of the oscillator is maximum.

Explanation

We know that in SHM, the velocity is zero when particle is at the extreme position (i.e., displacement is maximum) and velocity is maximum when particle is at the mean position, i.e., displacement is zero. Thus velocity os oscillator is zero at locations A,C,E, and G. The speed of oscillator is maximum at locations B,DD,F and H.