A mass weighing 4 lb stretches a spring 1.5 in. The mass
Chapter 3, Problem 5(choose chapter or problem)
A mass weighing 4 lb stretches a spring 1.5 in. The mass is given a positive displacement of 2 in from its equilibrium position and released with no initial velocity.Assuming that there is no damping and that the mass is acted on by an external force of 2 cos 3t lb, formulate the initial value problem describing the motion of the mass.
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