One stick game...

[iacob alex]

...is included in the old topic "Two sticks game".
There,I intended to describe in the most simply manner,a double oscillatory mechanical system,swinging in the gravitational field(the skeleton line of Milkovic's "Mechanical hammer with a pendulum").
We need two sticks(one long,one short) and two pivots(one on the ground/support/fulcrum,one on the long stick).
The long stick,supported by the first pivot ,acts as a first class lever,with the long arm as a "hammer" and with the short arm ,as a support for the short stick.
The short stick,is hanged with a second pivot on the short arm of the long stick.
If we swing the short stick,we can notice the swinging of the both sticks;we have with a minimal spare parts a double mechanical swinging system in gravity.
And now,we can introduce the "One stick game..."...
...conditionated by the position of the pivot on the short stick(at on end,in the middle or some elsewhere),we get different times for the double swinging motions(shorter,no one and various).
In simple words,in fact we are playing two sticks,bars as two levers.
One stick game is a lever(bar) played as a pendulum,in gravity,from fast to slow motion,in accordance to the placement of the pivot on this one.
Sometimes,the simple games,as that of children,are not amusaments only,but suggesting ways for action.
All the Bests! / Alex

[Dave]

Yes I agree

[iacob alex]

Hi Dave!
Our one stick game,can be played as a pendulum,in gravity,from fast to slow motion,in accordance to the placement of the pivot on this one.
If the pivot is fixed ,and we release the pendulum from the top position,in a free up-down fall,without any additional impulse(with no initial velocity),the trajectory of the any point(including the center of weight) is a not completed circle(due to friction).
If we add an impulse to the pendulum in the top position(some initial velocity),we can get a full round trajectory,and a new fall(s).
Now the "game":
1/the pivot is in your hand
2/try to move pendulum in a continuous ring-like motion,around the pivot(this time, a mobile fulcrum in your hand)
3/have in sight the motion of your hand
4/try to replace the movements of your hand with a "mechanically as hand" configuration
5/think about Milkovic's double oscillatory system(pendular lever)
6/imagine your own system
7/play it,this game seems to be rewarding...

One of the joys of life is to keep our curiosity alive.
All the Bests! / Alex

[iacob alex]

Hi!
The last message was intended about a pendulum with a mobile fulcrum.
It can be as a Milkovic's pendulum,or in a more expressive show,as the second and the third pendulum of Alexander Calder's "Performing Seal".

The problem of this kind is more difficult(on paper...) than one of the pendulum with a fixed fulcrum.

If we search on net "mesodynamics",we can notiice new miraculous facts about the common pendulum(fixed fulcrum).

Mesodynamics is an unstudied region,whose width is 19 orders of magnitude-between classical mechanics and quantum mechanics.

The first experiment involving mesodynamics(Dr. Peters/Ga/US),involved a long-period pendulum operating at low amplitude.

One of the more fascinating observation of a mass dynamic type is that of negative damping.

A long period pendulum can be determined by external means into a "far-from-equilibrium" condition.

Now,when negative damping occurs,the amplitude of the oscillation increases.

In the case of the pendulum,the energy from oscillation in this negative damping case comes from the interaction with the support structures,as a primary supposition,but the research is on the way, so new facts can show up.

A simple-constructed mettalic rod("One stick game...") pendulumis is capable of demonstrating rich physics in a largely unstudied area.

A rod,a stick is a huge net of atoms,and the atoms do not remain in a fixed lattice position,face to an irrotational gravity field...and side-by-side have an interplay with inertia.

As you see,the physical pendulum motion is never simple,it can be a promising playing field ,for good news about the topic of this forum.

All the Bests! / Alex



Some novelties

[Patrick]

...

[wheelrite]

i really dont understand, is it English?
regards
Jon

[iacob alex]

Hi!

For some details concerning "Mesodynamics" take a look at http://physics.mercer.edu/petepag/nonlin.htm ,from the "godfather" of this huge domain.
All the Bests ! / Alex

[iacob alex]

Hi!
For people interested in the manner that a simple stick is falling in a gravity potential flow ,I recommend a very short movie at : http://myweb.lmu.edu/gvarieschi/chimney ... forweb.mov
Now,you can imagine easy,that a simple stick that plays a swinging motion can show ,as out of the blue,some astonishing features.
If we imagine more,that a simple stick can be a straight or any other shape line,we understand that the pendular motion is never..simple.
Have a fun play...All the Bests ! / Alex

[murilo]

This is an interesting and different question! Then I expended some observations about.

In vertical position the segmented part of stick helps to form a single, or unified, center of gravity over floor.

When falling at ~ 45º the segments have no more structure and cause the division of the stick in two sepparated parts.

Then, near to this angle the '' top point of the stick'' finds to its own gravity resultant before reaching ground.

Surely if you have a 50% segmented stick with full solid top, it will colapse before 45°.

If top is the segmented part, all small parts are not going to fall not so far from the base.

A full segmented ''stick'' will also colapse very easily.

Still to find what will hapen if segments have the same density of the solid longer parts.

Later I'll try to reach about wich is the deal with pendules.

Regs. M. SP march/01

[iacob alex]

Hi!

The falling stick demo is a formal study of the so impressive falling chimney phenomenon.

A such method,can suggest us, the most important information,regarding the size (diameter) of a collecting power rotor in gravity.

We are as on an invisible flow,with a rotor in our hands,searching the cut-line for the blades,so that the velocity of the flux is greater than the velocity of any point of the power collector.

This time the subject is about "greater than g/gravitational acceleration".

The problem is that the falling stick must be positionated as a first class lever(unequal arms),and the concave-convex game in a fluidic flow(air,water) for a power collector,needs to be replaced with a long arm-short arm game.

We remake the falling stick demo and make a "cut" ,so to "discard" the greater than "g" part,and so excluding the dissipation effect of the amassed power.

Inside this size(diameter),we can play long arm -short arm...

All the Bests! / Alex

[murilo]

Hello...
I'm not sure if I understand to your thinking.
Do you mean that rotative ''arms'' will experimentaly find to their maximum optimized lenght?
If so, what about centrifugal force to keep the ''stick'' in straight, after imnercia of the start?
regs. M.

[iacob alex]

Hi !

In two words:we must play inside a(acceleration of any point of the stick)< g (gravitational acceleration).
Falling stick as an unequal first class lever plays a longer fall time,that the same stick as a pendulum(hinged at one end).

The same stick,the same pendular game,unlike swinging times.
In any flow,the collector has a smaller velocity.If some points have a greater velocity than the flow,we have dissipative problems(smaller efficiency).

All the Bests! / Alex

[murilo]

Yes, now I got it.
A stick, falling, will try to reach to the same ''natural'' velocity of a free falling pendule.
If not possible, will brake or dissipate.
Clear now! I mean, very clear!
Fortunately g celeration is enough fast and powerfull.
Thanks, M.

[iacob alex]

Hi !

In a rotating stick arrangement ,as a first class lever(unequal arms),the marginal points of the falling long arm,must never attain an acceleration greater than "g"(natural "flow").This is the non-dissipative precondition,to collect the maximum input power.

"Inside " this zone,we can imagine the shape of the gravity power collector,as a slower rotating(not swinging!) pendular arrangement.

All the Bests! / Alex

[iacob alex]

.....playing a continuous rotation,will be,as I see the future,a simple kindegarten toy,so to explain easy ,how a gravity engine works.

For adults ,can be,for the moment, no more than a factitious "inertial fish"(dolphin , in a gravity flow/fall playing an asymmetric game on the surface of ocean...)if you have the taste of poetry.

If not,thinking in a standard language,this can be an equivalent of a pulsatory lever/stick (due to a hinged end),moving continuously ("self motion"),due to gravity fall and inertia in-out storage.

I MADE THE TEST of a full 360* positive acceleration.IT"S A REALITY!...as for a www.freeenergy.com pre-condition.

About the "self-rotation" of a simple pulsatory stick,as a plain expression of a gravity engine (transforming potential gravity energy into motion) ,I have ,at least two proposals...only.

Sorry,momentary my web-site ("Stellarotor") is not available...so to understand me better.

All the best! / Alex