A car with a mass of 1570 kg is supported by four springs, each with a spring constant of 25 N/mm. In traveling over an elevated highway, vertical motion in the car is excited Each span of the highway is 25 m in length and sags 15 mm at midspan. Determine the maximum vertical excursion of the car traveling at 100 km/h on this highway. Neglect the damping in the vehicle suspension