Question

A mass of 120kg is on a spring of stiffness 7500N/m. a)What is the natural frequency? b)If the mass is initially displaced 0.25m and released what is its displacement after 5s? c)At what time will it first come to rest? d)Explain what happens if a forcing vibration, very close to the natural frequency,is imposed on the system. Give examples of such situations.

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