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iacob alex
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Joined: 20 Nov 2006
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Location: costa mesa /CA/US
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iacob alex
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greendoor
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Joined: 04 May 2008
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Location: New Zealand
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iacob alex
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Posted: Tue Aug 05, 2008 5:34 pm Post subject: re: Heavy hub pendulum... |
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Hi Greendoor!
Your corkscrew image...is far away from my scenery:an Atwood machine with a massive pulley,or a pendulum with a heavy hub,as a starting point for a gravity powered device..Sorry...
As I see the things,energy is stored everywhere,as a spectrum,but if we can get it "free",it's more easy to gather it from a gravity potential fall(h...mgh...a level difference) than from a velocity difference(inertia...the outer space,linear momentum difference of two bodies).
Gravity can be regarded as a nonlinear potential flow,a possible cascade if you want...
To gather it,we can use a temporary but direct transfer in inertia(rotational,angular "fall"),a short time storage,like an uprising wave.
Really,we are living on the beach of a possible incoming cosmic energy,this gravity...so,let's play waves!
All the Bests! / Alex
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greendoor
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iacob alex
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Posted: Wed Aug 06, 2008 10:07 am Post subject: re: Heavy hub pendulum... |
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Hi Greendoor1
Your comments are interesting ones...and sometimes can create some inspiration:I am thinking about your corkscrew idea...
It was for me,after some time to imagine a double centered-eccentered game,with a pliable hub(hub as a centered mass,then commuting as an eccentered mass/pendulum) as a driver,and a two arms lever(long arm-short arm,then commuting into two equal arms),as a follower.
Sure,the intention is to get an self moving arrangement:this time the advantage is that we have a starting velocity for the hub,playing as a falling pendulum,for the eccentric timing.
I have it in my mind,the next step is to make it on paper...
But ,you see,the paper is worthlees ,if with no connection in the real world...
All that I know is that a small unbalance,applied to a well balanced system,for some period and in a certain mood,can have an amazing effect.
All the Bests! / Alex
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iacob alex
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pequaide
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Joined: 14 Oct 2008
Posts: 869
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Posted: Sun Apr 26, 2009 1:58 am Post subject: re: Heavy hub pendulum... |
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In the MSU Atwood’s you can put 2000 kilograms in the pulley mass and it will act as if it is a rim mass pulley of 1000 kilograms. So with mass of zero suspended on one side and 1 kilogram suspended on the other side you would get an acceleration of 1/1001 * 9.81 = .00980 m/sec².
If the one kilogram is then dropped one meter the entire mass would have a velocity of .14 m/sec for a momentum of 140.14. The dropping of the one kilogram mass would take 14.286 seconds, so if we apply F = ma and use v/t for a, we would get Ft = mv. So 9.81 N *14.286 sec = 1001 ka *.14 m/sec, ha how about that it works.
Now if all the motion of the 1001 kilograms is given to the one suspended kilogram, in a similar manner to NASA giving all the motion of the spinning rocket to a small tethered mass, then the one kilogram will have to be moving 140.14 meters per second. Let’s see how long it will take 9.81 newtons (the original force) to stop the one kilogram mass moving 140.14 m/sec. Using v = at we find that it takes 14.285 sec.,
If you think energy is conserved when all the motion is given to the one kilogram then it will only be moving 11.83 m/sec, and it will take 9.81 newtons only 1.26 second to stop it.
Some keep saying that force times distance is what is conserved in these interactions, and that force times distance needs to be conserved in these interactions, When in fact it is not, it is force times time that is conserved. The same people that say that it is force times distance have no working machines. I say that it is force times time and I have working energy producing machines. When are you going to wise up my friends? It is Force times Time.
What makes you think that (with a force of 9.81 newtons) you should be able to stop in 1.26 seconds the same quantity of motion that took 9.81 newtons 14.285 sec to make? Plus you have no experiments that will do this.
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greendoor
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pequaide
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greendoor
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iacob alex
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Posted: Sun Apr 26, 2009 4:52 am Post subject: re: Heavy hub pendulum... |
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Hi !
Maybe I am wrong...I am not sure,but my "nose",aptitude for insight tells me that, the person simulating "Atwood Machine with a Heavy Pulley",made something formidable:imagined a paradox.
Possibly,already we have on the table the "nascent PM"...that "up-down " difference.
You know the story of the scientific "interdiction":any closed trajectory of a mass-point, in gravity(difference of potential),has a null result.
No comment...
But with a heavy pulley M3 (rotating on the spot,or more interesting...rolling on a horizontal surface),and a small mass-unit " m " on his top position(a heavy hub pendulum...)we have a different situation.
If our science on the paper corresponds with a test in reality...we are on the way.
All the Bests! / Alex
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pequaide
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iacob alex
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iacob alex
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