Conservation of Angular Momentum

AI Thread Summary
The discussion centers on using the conservation of angular momentum to explain a scenario involving a rod and a cork. A participant seeks clarification on how this principle applies to a situation where a glass is saved after the cork is released. The conversation highlights the need for proper formatting in physics queries, particularly for non-homework-related questions. Participants are advised to create new threads using a specific template for clarity. The thread ultimately concludes with a request for closure and guidance on future postings.
bugatti79
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Hi Folks,

How would one use the conservation of angular momentum to explain the attached picture?
The rod is held fixed horizontally..the person holds on to the cork and then let's go...apparently the glass is saved due to this conservation...
 

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Hi. I am not a student and this is not homework. I am reading physicsnin my spare time and occasionally I put a question up to get peoples opinions/help.
Please advise how I should proceed for future queries..
Thanks
B
 
Ah...I understand... homework TYPE questions. Ok.
I will know in future! Can this thread be moved or shall I repost?
Thanks
B
 

Thread 'Derivation of Hamilton's Principle: Questions'

I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...
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