Out of the following functions representing motion of a particle which represents SHM
(1)  y = sin$$\omega $$t $$-$$ cos$$\omega $$t
(2)  y = sin³$$\omega $$t
(3)  y = 5cos$$\left( {{{3\pi } \over 4} - 3\omega t} \right)$$
(4)  y = 1 + $$\omega $$t + $$\omega $$²t²

The displacement of a particle along the x-axis is given by x = asin²$$\omega $$t. The motion of the particle corresponds to

The period of oscillation of a mass M suspended from a strong of negligible mass is T. If along with it another mass M is also suspended, the period of oscillation will now be

A simple pendulum performs simple harmonic motion about x = 0 with an amplitude a and time period T. The speed of the pendulum at x = a/2 will be