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Figure 1 shows the simplified model of a quarter vehicle suspension. In Homework #1, we have derived the equations of motion for the vehicle mass m. Now the vehicle is traveling on a wavy road at the constant velocity u. Use the dynamic model in Homework #1. z(t) v constant y = Asin ( 2 *) Figure 1 (a) Determine the most unfavorable speed v if the system is undamped, i.e.c0. (b) Derive the system response z(t) and plot the magnitude and phase angle of the vehicle displacement z(t) versus- for 〈 = 0, 0.2 and 1.5 (using MATLAB), where an is the natural frequency of the system

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