(Solved): The free-vibration response of spring-mass system was recorded as shown in the figure below, with ...

The free-vibration response of spring-mass system was recorded as shown in the figure below, with the asterisks indicating the zero crossings at t = 0.09813 and t = 0.3723 seconds. Displacement (mm) 400 300 200 100 0 -100 -200 -300 -400 0 Given that the Mass is 11 kg, determine the: Natural Frequency: Stiffness: N/m 0.1 mm radians Hz 0.2 0.3 Time (s) 0.4 If the initial displacement and velocity were: 200 mm and -27.5 m/s. Determine the amplitude and phase of the response equation x(t) = Asin(@nt + p) Amplitude: Phase: 0.5