question_answer 44)

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

Answer:

                  Velocity is maximum, when displacement from mean position is zero and velocity is minimum or zero, when displacement from mean position is maximum.                 (a) Velocity of die oscillator is zero at A, C, E and G.                 (b) Speed of the oscillator is maximum at B, D, F and H.