A mass weighting 56 lbs stretches a spring 3 inches. The

Last updated: 7/19/2022

A mass weighting 56 lbs stretches a spring 3 inches. The mass is in a medium that exerts a viscous resistance of 117 lbs when the mass has a velocity of 6 ft/sec. Suppose the object is displaced an additional 7 inches and released. Find an equation for the object's displacement, u(t), in feet after t seconds. Use the convention: If the displacement is upward then u < 0