Chapter 6 Applications of Linear Second Order Equations 278 4. An object stretches a spring 6 inches in equilibrium. Find its displacement for t > 0 if it's initially displaced 3 inches above...

Extracted text: Chapter 6 Applications of Linear Second Order Equations 278 4. An object stretches a spring 6 inches in equilibrium. Find its displacement for t > 0 if it's initially displaced 3 inches above equilibrium and given a downward velocity of 6 inches/s. Find the frequency, period, amplitude and phase angle of the motion