Problem 2 An undamped spring-mass system has mass of 4.5 kg and a spring stiffness of 3500 N/m. It is excited by a harmonic (sinus) force having an amplitude Fo = 100 N and excitation frequency of 10 rad/s. The initial conditions are xo = 0.015 m and i o= 0.15 m/s. Answer to the following questions. Report the unit of measure and the equations that you used in all your answers. Required: 1. Determine the frequency ratio. 2. Determine the amplitude A of the forced response. 3. Determine the displacement of the system at time t = 2 s.

Problem 2 An undamped spring-mass system has mass of 4.5 kg and a spring stiffness of 3500 N/m. It is excited by a harmonic (sinus) force having an amplitude Fo = 100 N and excitation frequency of 10 rad/s. The initial conditions are xo = 0.015 m and i o= 0.15 m/s. Answer to the following questions. Report the unit of measure and the equations that you used in all your answers. Required: 1. Determine the frequency ratio. 2. Determine the amplitude A of the forced response. 3. Determine the displacement of the system at time t = 2 s.