Chapter 6 Applications of Linear Second Order Equations 288 6.2 Exercises 1. A 64 lb object stretches a spring 4 ft in equilibrium. It is attached to a dashpot with damping 8 lb-sec/ft. The object is...

Extracted text: Chapter 6 Applications of Linear Second Order Equations 288 6.2 Exercises 1. A 64 lb object stretches a spring 4 ft in equilibrium. It is attached to a dashpot with damping 8 lb-sec/ft. The object is initially displaced 18 inches above equilibrium and given a downward velocity of 4 ft/sec. Find its displacement and time-varying amplitude for t > 0. constant c =