Include a constant counter clockwise moment of 40 lb.ft A slender 9-lb rod can rotate in…

Include a constant counter
clockwise moment of 40 lb.ft
A slender 9-lb rod can rotate in a vertical plane about a pivot at B. A spring of constant k 30 lb/ft and of unstretched length 6 in. is attached to the rod as shown. Knowing that the rod is released from rest in the position shown, determine its angular velocity after it has rotated through 90 Fig. P17.18 24 in 5 in. 14in.