Question on physics :)
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sss
diyAudio Member

Join Date: Jul 2003
Location: Israel , haifa
qquestion on physics :)

look at the pic ...
the small wheel is turning the big wheel ,when a chain is connecting between them .

if the small wheel is turning at constant speed , no friction whatsoever ...
is there a force on the chain?
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 6th May 2006, 10:11 PM #2 SY   On Hiatus     Join Date: Oct 2002 Location: Chicagoland Once everything is up to speed, no, assuming everything is lossless. The big wheel's angular momentum is conserved. __________________ "You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is."
 7th May 2006, 05:36 AM #3 maxro   diyAudio Member     Join Date: Dec 2004 Location: Survey says: Least happiest city in Canada What's the real-world application? There is no such thing as 'no friction whatsoever'. Beware, this could turn into another conveyer-belt thread. Max __________________ "No one likes jazz that much; even the guy playing it had to take drugs." -Bart Simpson
sss
diyAudio Member

Join Date: Jul 2003
Location: Israel , haifa
Quote:
 Originally posted by maxro What's the real-world application? There is no such thing as 'no friction whatsoever'. Beware, this could turn into another conveyer-belt thread. Max

but , i forgot ,there must be a static friction between the chain and the wheels , if not then the chain wont move
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if you are not living on the edge you are taking too much space

 9th May 2006, 03:53 AM #5 xplod1236   diyAudio Member     Join Date: Dec 2003 Location: On the couch There has to be a force on the chain. If there was no force, the momentum of the links that are going straight would keep them going straight. But as you illustrated, they go around the sprockets. The centripetal acceleration of the links makes chain want to come off the sprocket as it goes around. The chain, being a loop, prevents this because the other side of the chain going around the other sprocket wants to come off in the opposite direction. All this results in tension in the chain. If the chain was a perfect circle, then there would be no force on it.
 9th May 2006, 02:43 PM #6 quasi   diyAudio Member     Join Date: Sep 2004 Location: Adelaide, Australia But even if the chain was a perfect circle wouldn't there be an amount of centrifical force on each chain link as it moved around? __________________ http://sites.google.com/site/quasisdiyaudiosite/
quasi
diyAudio Member

Join Date: Sep 2004
sorry ...couldn't resist .....tried not to but ....
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 9th May 2006, 03:25 PM #8 anatech   diyAudio Moderator     Join Date: Jun 2004 Location: Georgetown, On Way to go quasi! Troublemaker! -Chris
xplod1236
diyAudio Member

Join Date: Dec 2003
Location: On the couch
Quote:
 Originally posted by quasi But even if the chain was a perfect circle wouldn't there be an amount of centrifical force on each chain link as it moved around?
You're right. Either way, there would be tension in the chain. I don't know how I missed that part.

sss
diyAudio Member

Join Date: Jul 2003
Location: Israel , haifa
Quote:
 Originally posted by xplod1236 You're right. Either way, there would be tension in the chain. I don't know how I missed that part.
if the chain got no weight to it then there will be no tension if the wheels are spinning at constant speed
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if you are not living on the edge you are taking too much space

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