What is the solution to this Rotational Motion problem?

[coldblood]

Hi friends,
Please help me in solving this problem, I'll appreciate the help.

The problem is as:

https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-prn1/q71/s720x720/1521987_1461726820721090_508820317_n.jpg

Attempt-
https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-prn2/q71/s720x720/1480633_1461727047387734_1942268314_n.jpg


Thank you all in advance.

 

[haruspex]

You've forgotten that the rod will also have a linear speed.

 

[coldblood]

The problem has been cleared.