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An object has mass 10 kg and is hanging from a spring with stiffness
coefficient k = 450 kg/sec². The damping coefficient due to friction is b =
120 kg/sec. The object is stretched to point that is 0.3 meters below
equilibrium and released with an upward velocity of -0.6 m/sec.
Assume that there are no external forces. Determine the equation of motion
of the object.
y(t) =

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