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A sedan weighing 2,000 kg is traveling at 120 kph over a series of sinusoidal bumps having a roughness height of 6 cm and

A sedan weighing 2,000 kg is traveling at 120 kph over a series of sinusoidal bumps having a roughness height of 6 cm and spacing of 3 m. The spring at each wheel has a stiffness of 100,000 N/m. The entire car is critically damped. What's the amplitude of the car's bounce?

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