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Author Topic: Fixed vs. mobile fulcrum...  (Read 4649 times)

iacob alex

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Fixed vs. mobile fulcrum...
« on: February 25, 2012, 09:54:35 AM »
 
....at :   www.youtube.com/watch?v=tjkRL9qW778&feature=related
 
   This time,the two swinging sticks game has:
    -a fixed fulcrum
    -a mobile game
    -a rotatio limiting point for the small stick
 
   It can be a starting  image to think about and evolve the topic of this  forum.
 
      All the best! / Alex
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iacob alex

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Re: Fixed vs. mobile fulcrum...
« Reply #1 on: February 25, 2012, 04:22:57 PM »
 
    Hi !
 Generally speaking,a fulcrum is the support of a body,inside/on the surface of another body.
 
The topic about swinging sticks implies a long serial (shadouf,country water well,...Milkovic's lever with pendulum....desk toys /lever+pendulum+magnet+battery).
 
All have on paper ,a simple prime line: fulcrum+lever/long stick + pendulum or counterweighted pendulum/small stick).
 
This is my point of view to simplify the way to a possible PM device.
 
Mobile fulcrum is a more general problem : a flexible body insile an elastinc medium ("fish in water" and still more...).
 
If the fish undulates,the water reacts as that to a slippery air "intrusion":there is no difference for the "point of view" of the liquid  medium.
 
As you can see,there are two separate topics/concepts that can help one another...
 
   All the best! / Alex
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