After an initial disturbance which was the same for both systems, the free dynamic responses of two SDOF systems are shown in Figure Q$1$d$.$ ?Which system $($A or B$)$ ?has higher damped natural frequency? Briefly explain your answer

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Displacement [m] 3 2 - x 103 System A: Displacement versus Time 2 Time [s] Displacement [m] 2 Figure Q1d 103 System B: Displacement versus Time 2 Time [s] 3 Displacement [m] 3 2 - x 103 System A: Displacement versus Time 2 Time [s] Displacement [m] 2 Figure Q1d 103 System B: Displacement versus Time 2 Time [s] 3