
#1
Apr813, 10:50 AM

P: 232

Hi
Question 1 i was wondering if there is any method to find the point from which the angular momentum is a conserved quantity. let me e.g. choose the case of a planet moving in an orbit around the sun. In this case, the angular momentum measured from the center of mass as the point of reference is conserved. But if i choose a different point, that is not exactly on the line connecting the planet and the sun, then the angular momentum is varying with time. so how do i found out how to choose this point, if the system is more complex? Question 2 if F is a conservative force field, then the energy is conserved. is the converse, the energy is conserved, therefore we have a conservative force field also true? 



#2
Apr913, 02:22 AM

Homework
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Thanks ∞
PF Gold
P: 11,102

Is it not always the center of mass for gravitating systems? 



#3
Apr913, 02:26 AM

P: 232

Thank you for your answer, but is this a question or an answer?




#4
Apr913, 02:35 AM

Homework
Sci Advisor
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Thanks ∞
PF Gold
P: 11,102

Questions on classical mechanicsIt can be hard to tell if a statement followed by a question mark is an actual question or a rhetorical question. All the questions in post #2 can be safely treated as actual questions. I am posing them as a way to help you clarify your thinking and so find the answers you seek. 


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