A spring gets stretched by 8 in. if an object weighing16 Ib is attached to it. This object is pulled 4 in. below its equilibrium position and released. If the system is undamped and subjected to an external force F(t)=2 cos t, determine the displacement of the object. cos (4/3t) + cos t ] 5. 35 [y(t) = 141
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