A slender rod of length L and mass m is released from rest in the position shown. It is observed that after the rod strikes the vertical surface it rebounds to form an angle of 30° with the vertical.
(a) Determine the coefficient of restitution between knob K and the surface.
(b) Show that the same rebound can be expected for any position of knob K.
![159_c701c882-bc41-46f1-8b72-e1480cd5c937.png](https://secure.tutorsglobe.com/CMSImages/159_c701c882-bc41-46f1-8b72-e1480cd5c937.png)