2. Consider the system sketched above. Assuming that the presence of the isolator component makes the natural frequency of vibration half of the working frequency of50HZ, design a dynamic vibration

absorber that provides the lowest natural frequency of vibration equal to 25H7. Schematize the dynamic vibration absorber as a system of amass ma and a spring of constant ka. Determine the values of ma, ka and of the highest frequency of natural vibration. In your calculations, assume that the isolator to be solely composed of a spring element.