A 10-lb uniform rod CD of length l =2.2 ft is welded at C to two elastic rods, which have fixed ends at A and B and are known to have a combined torsional spring constant K = 18 lb · ft/rad. Determine the period of small oscillations, if the equilibrium position of CD is
(a) vertical as shown,
(b) horizontal.
![753_d4c8dbd4-b6f4-4e1e-a264-6992dc77c4f1.png](https://secure.tutorsglobe.com/CMSImages/753_d4c8dbd4-b6f4-4e1e-a264-6992dc77c4f1.png)