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6th May 2006, 09:00 PM
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#1 |
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diyAudio Member
Join Date: Jul 2003
Location: Israel , haifa
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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
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#2 |
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diyAudio Moderator
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Once everything is up to speed, no, assuming everything is lossless. The big wheel's angular momentum is conserved.
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7th May 2006, 05:36 AM
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#3 |
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diyAudio Member
Join Date: Dec 2004
Location: Survey says: Least happiest city in Canada
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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
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8th May 2006, 04:37 AM
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#4 | |
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diyAudio Member
Join Date: Jul 2003
Location: Israel , haifa
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Quote:
 nah , SV allready answered the question  (thanx btw!)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
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9th May 2006, 03:53 AM
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#5 |
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diyAudio Member
Join Date: Dec 2003
Location: On the couch
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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. |
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9th May 2006, 02:43 PM
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#6 |
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diyAudio Member
Join Date: Sep 2004
Location: Adelaide, Australia
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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?
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9th May 2006, 03:08 PM
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#7 |
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diyAudio Member
Join Date: Sep 2004
Location: Adelaide, Australia
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sorry ...couldn't resist .....tried not to but ....
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9th May 2006, 03:50 PM
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#9 | |
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diyAudio Member
Join Date: Dec 2003
Location: On the couch
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Quote:
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9th May 2006, 05:23 PM
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#10 | |
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diyAudio Member
Join Date: Jul 2003
Location: Israel , haifa
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Quote:
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