Answer: A mass weighing 16 pounds stretches a spring feet. The mass is initially
Chapter 5, Problem 29(choose chapter or problem)
A mass weighing 16 pounds stretches a spring feet. The mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to the instantaneous velocity. Find the equation of motion if the mass is driven by an external force equal to f(t) 10 cos 3t.
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