Pendulum with different mass(Simple Pendulum)

To determine the (i) coefficient of damping K, (ii) relaxation time t, and (iii) the quality factor Q fo a damped simple harmonic motion using a simple pendulum.

Apparatus Required : A long simple pendulum with brass bob and two extra bobs on of aluminium and the other of wood of the same mass or of the same diameter as that of brass, meter scale and a stop watch digital.