eThe following undamped (c=0) Single Degree of Freedom (SDOF) system has a stiffness of k= 2,1 kN/m. After the application of a 1.0m initial displacement, the system makes a free vibration with the following displacement history. Calculate the mass of the system in kg. Note: Please write only 2 digits after the comma! U (t) [m] 1.21 1.0 0.st 0.6 0.4 0.24 0.0 0.51 1.0 -0.2 -0.4 -0.6 -0.8t - 1.0t [c ooooo k -1.2 1.5 2.0 m 2.5 3.0 3.5 4.0 14.5 5.0 Time [s] 5.5 6.0 U(t) 6.5 7.0 SI

The following undamped (c=0) Single Degree of Freedom (SDOF) system has a stiffness of k=2,1 kN/m. After the application of a 1.0m initial displacement, the system makes a free vibration with the following displacement history. Calculate the mass of the system in kg. Note: Please write only 2 digits after the comma! The following undamped (c=0) Single Degree of Freedom (SDOF) system has a stiffness of k=2,1 kN/m. After the application of a 1.0m initial displacement, the system makes a free vibration with the following displacement history. Calculate the mass of the system in kg Note: Please write only 2 digits after the comma