Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part A 15-lb slender rod AB is riveted to a 12-lb uniform disk as shown. A belt is attached to the rim of the disk and to a spring that holds the rod at rest in the position shown. End A of the rod is moved 0.75 in down and released. The value of the spring constant is k = 40 lb/in. -36 in. 10 in. A OB Determine the period of vibration The period of vibration is S. Determine the maximum velocity of end A The maximum velocity of end Ais in./s.