dynamics
Posting Guru
Joined: Jun 2005
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From: Location, Location.
A problem with many many science classes is that too much time is spent teaching how to calculate things, and too little time is spent teaching what these things actually represent in the real world.
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
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From: Lakewood, Ca.
This is really interesting to me. I have never had any type of formal education in dynamics, so I may be way off on this, but I can't resist asking what may be a foolish question.
The original question asks for the center of rotation at the moment the rod is kicked. If the center was fixed, say on a pin, obviously it would rotate about the center. But, since it isn't, would not the acceleration of the rod at the moment it was kicked cause it to skid across the ice for a distance until the centrifugal force caused it to stabilize? If so, does that not change the center of mass for that moment?
The original question asks for the center of rotation at the moment the rod is kicked. If the center was fixed, say on a pin, obviously it would rotate about the center. But, since it isn't, would not the acceleration of the rod at the moment it was kicked cause it to skid across the ice for a distance until the centrifugal force caused it to stabilize? If so, does that not change the center of mass for that moment?
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
This is really interesting to me. I have never had any type of formal education in dynamics, so I may be way off on this, but I can't resist asking what may be a foolish question.
The original question asks for the center of rotation at the moment the rod is kicked. If the center was fixed, say on a pin, obviously it would rotate about the center. But, since it isn't, would not the acceleration of the rod at the moment it was kicked cause it to skid across the ice for a distance until the centrifugal force caused it to stabilize? If so, does that not change the center of mass for that moment?
The original question asks for the center of rotation at the moment the rod is kicked. If the center was fixed, say on a pin, obviously it would rotate about the center. But, since it isn't, would not the acceleration of the rod at the moment it was kicked cause it to skid across the ice for a distance until the centrifugal force caused it to stabilize? If so, does that not change the center of mass for that moment?
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
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Joined: Oct 2007
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From: Birmingham, AL
Rant over. Its exam week
; just needed to vent a little.
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