What is the solution to this Rotational Motion problem?

AI Thread Summary
The discussion centers around a rotational motion problem that a user seeks help with, providing links to the problem and their initial attempt at a solution. Participants emphasize the importance of considering the linear speed of the rod in the analysis. The issue appears to have been resolved as the user acknowledges the oversight regarding linear speed. The conversation highlights the collaborative nature of problem-solving in physics. Overall, the thread showcases the process of addressing and clarifying complex concepts in rotational motion.
coldblood
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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.
 
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You've forgotten that the rod will also have a linear speed.
 
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The problem has been cleared.
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
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