Ans. DAMPED OSCILLATIONS
. The oscillations of a system in the presence of some resistive force are called damped oscillations.
Practically, in all systems, the force of friction retards the motion, so the system does not oscillate indefinitely. The friction reduces the mechanical energy of the system as time passes, and the motion is said to be damped. This damping progressively reduces the amplitude of the motion as shown in the figure.