1. The problem statement, all variables and given/known data After a mass weighing 8 pounds is attached to a 5-foot spring, the spring measures 6.6 feet. The entire system is placed in a medium that offers a damping constant of one. Find the equation of motion if the mass is initially released from a point 6 inches below the equilibrium point with a upward velocity of 1 ft/sec. 2. Relevant equations F=kx my''+cy'+ky=0 3. The attempt at a solution I got k=8/(6.6-5) = 8/1.2 c= 1 as given ? setting up the eqn I got 1/4 y'' + 1y' + 8/1.2 y = 0 or y'' +4y' + 80/3 y = 0 is this actually right? I tried 3 times and I keep getting this, i dont know i feel suspicious ?!