The 5-lb slender rod AB is released from rest in the position shown and swings to a vertical position where it strikes the 3-lb slender rod CD. Knowing that the coefficient of restitution between the knob K attached to rod AB and rod CD is 0.8, determine the maximum angle um through which rod CD will rotate after the impact.
![1641_a825f4af-043c-41e9-ab92-25dca2228f24.png](https://secure.tutorsglobe.com/CMSImages/1641_a825f4af-043c-41e9-ab92-25dca2228f24.png)