Solved: The 450-kg trailer is pulled with a constant speed

Chapter 22, Problem 22-60

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The 450-kg trailer is pulled with a constant speed over the surface of a bumpy road, which may be approximated by a cosine curve having an amplitude of 50 mm and wave length of 4 m. If the two springs s which support the trailer each have a stiffness of 800 N>m, determine the speed v which will cause the greatest vibration (resonance) of the trailer. Neglect the weight of the wheels

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