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Problem 1: A 641b weight stretches a spring 3.2ft in equilibrium. It is submitted to friction with damping coefficient y = 81b . sec/ ft.

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Problem 1: A 641b weight stretches a spring 3.2ft in equilibrium. It is submitted to friction with damping coefficient y = 81b . sec/ ft. The weight is initially displaced 6 inches below equilibrium and given a downward velocity of 16ft/ sec. Find its displacement from equilibrium, u(t), for t > 0

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