72. A mass m is tethered by a spring of spring constant & to Ans. the mid point between two walls separated by a distance d. Ihe relaxed length of the spring is zero and collisions Or the mass with the walls are completely elastic. If the mass is released from its equilibrium position with speed V, the time period of its motion is independent of v (a) for all values of (b) only for y (o)only for v> )onlyfor d IISe-2012