damping motion

• Oscillatory motion is the repeated to-and-from movement of a system from its equilibrium position
• Every system at rest is in its equilibrium position.
• Damping is the decrease in amplitude of an oscillation because of energy being drained from the system to overcome frictional or other resistive forces.
• Undamped oscillation is an oscillatory motion whose amplitude remains the same or constant. It is shown in the illustration that the pendulum swings at a constant amplitude
• Damped oscillation are those oscillatory motions whose amplitude decreases with time until they achieve a state of equilibrium. In the diagram, the pendulum swings to position 1 first, then 2, 3, 4 until it becomes still (5)