Underdamped refers to a specific type of oscillatory motion in which a system oscillates with decreasing amplitude over time but does not settle down immediately. This behavior occurs when the damping force acting on the system is relatively weak compared to the restoring force, allowing the system to complete several oscillations before coming to rest. The underdamped condition is characterized by a specific damped frequency that is lower than the natural frequency of the system, leading to oscillations that gradually diminish in intensity.
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