question_answer 38)

                  A spring with one end attached to a mass and the other to a rigid support is stretched and released.                 (a) Magnitude of acceleration, when just released is maximum.                                (b) Magnitude of acceleration, when at equilibrium position, is maximum.                 (c) Speed is maximum when mass is at equilibrium position.                        (d) Magnitude of displacement is always maximum whenever speed is minimum.                

Answer:

  (a, c) When spring is released, then mass starts oscillating about its equilibrium position (S.H.M). Speed is maximum when mass is at equilibrium position and acceleration is maximum at the extreme position.