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Posted: 8/14/2013 7:51:04 PM EDT
[#1]
60 rpm
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Posted: 8/14/2013 9:55:47 PM EDT
[#2]
Quote HistoryQuoted: 60 rpm |
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Posted: 8/15/2013 5:26:07 PM EDT
[#3]
In a case like this, you can use conservation of angular momentum.
r1w1 = r2w2 where r1 and r2 are the respective radii, and w1 and w2 are omega 1 and omega 2, the angular frequency of each shaft. 2 (120) = 4 w2 ---> w2 = 60 60 rpm |
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Posted: 8/15/2013 9:06:19 PM EDT
[#4]
Quote HistoryQuoted:
In a case like this, you can use conservation of angular momentum. r1w1 = r2w2 where r1 and r2 are the respective radii, and w1 and w2 are omega 1 and omega 2, the angular frequency of each shaft. 2 (120) = 4 w2 ---> w2 = 60 60 rpm Thanks for the answer. |
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Posted: 8/16/2013 9:55:24 AM EDT
[#5]
Quote HistoryQuoted:
Thanks for the answer. Quote HistoryQuoted:
Quoted:
In a case like this, you can use conservation of angular momentum. r1w1 = r2w2 where r1 and r2 are the respective radii, and w1 and w2 are omega 1 and omega 2, the angular frequency of each shaft. 2 (120) = 4 w2 ---> w2 = 60 60 rpm Thanks for the answer. I feel slighted. You didn't ask for an explanation just how many RPM |
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Posted: 8/16/2013 8:55:01 PM EDT
[#6]
Well, if you really want to get technical, it actually has nothing to do with conservation of angular momentum. The two are in direct contact; they're acting like gears. It's a simple ratio of circumferences that determines the speed. Angular momentum is an expression of the intertia of a rotating mass - i.e. the spinning skater pulls in their arms and spins faster because they reduced their angular momentum and energy must be conserved, so they speed up.
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Posted: 8/16/2013 10:28:53 PM EDT
[#7]
Quote HistoryQuoted:
Well, if you really want to get technical, it actually has nothing to do with conservation of angular momentum. The two are in direct contact; they're acting like gears. It's a simple ratio of circumferences that determines the speed. Angular momentum is an expression of the intertia of a rotating mass - i.e. the spinning skater pulls in their arms and spins faster because they reduced their angular momentum and energy must be conserved, so they speed up. I had the wrong term, right formula. When the skater pulls their arms in, their angular momentum is not reduced. Their moment of inertia is reduced, so their angular velocity, omega, must increase. Angular momentum is conserved in that case. |
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Posted: 8/19/2013 1:41:53 PM EDT
[#8]
This type of power feed is usually used to provide a slip point 9clutch type function) in a system and make sure the load on th ewhel does not get larger than desired.
Gears do not slip without spring engagement that allows one side to pop out of engagement. Under load the wheel will slip against the shaft. |
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