The merry go round

[Ealadha]

You could add sticks to the karussel , the one with one stick was just the prototype .

[Alexioco]

Im sorry to have to keep on like this but, I cant see how the stick would actually weigh the wheel down. Please tell me what Im missing...

Look at the below picture. The wheel has been spun and the stick has flung out... If the wheel was spun faster than gravities acceleration, then the stick will appear to rise up because its pivot has been pushed down faster than gravity pulls the stick down. If the wheel was spun slowly, then the stick will drop faster than the wheel. So I cannot see how the stick is applying any weight to the wheel except for a pull via centrifugal force. The sticks weight isnt vertically in line with its pivot.

Again, please allert me to what I may be missing...

Alex

[pequaide]

Put a mass on the end of the stick.

[Alexioco]

Ill have to build this when I have got my wheel back up and running. Its like the pendulum in the two stage oscilator, when it swings up and out, its weight becomes removed from the lever unti it swings back down...


Alex

[Ealadha]

Im sorry to have to keep on like this but, I cant see how the stick would actually weigh the wheel down. Please tell me what Im missing...

If you look at MT 62 , see the bucket attached to the rope which is wrapped around the axel , imagine newtonian gravity pulling the bucket downwards which causes the wheel to rotate , well it is the same principle with the stick on the merry-go-round i posted , except its using ersatz gravity / centrifugal force to pull the stick outwards .
If you look at it as the same operation except using centrigal force instead of newtonian gravity .
You use ersatz gravity/centrifugal force in the same way as newtonian gravity , of course the wheel has to be rotating for there to be centrifual force , so you need to imagine it as the wheel rotating , say 60 rpm , while the stick is pulling outwards .
Now on the merry-go-round you pull the stick back in by hand if you are standing on it , they used to have a rope tied onto the stick to pull it back in when they were standing on the karussel , so they would pull it in with the rope , then let the rope out and you would feel the stick pulling the karussel around like a horse pulling a cart when you let the reigns out .

[Alexioco]

So basically by just simply pulling in then releasing the stick via cord, centrifugal force would sustain the wheels rotation?

Edit: On a horizontal wheel I can see how that might work really well! Not sure how you would control it on a vertical wheel though...?

Alex

[Ealadha]

Deleted . More bad language .

[rlortie]

Alex,

IMO you are not making any show of education by following this thread and it's present path.

CF will tend to have an outward pull on any mass located within the boundaries of of a radius path in motion. If mounted a distance out from the axle it will pull on the wheel outwardly only until it becomes aligned with the axis of the vortex. That meaning the axle of your wheel.

If you have to reset it by hand and restart the wheel each time, of what value is it? Why not buy a yo-yo if you wish to play with such things.

Ralph

[Ealadha]

deleted

[pequaide]

I think they are dealing with a very important concept. I use strings but I think sticks would work just as well. What is important is not what motion the stick gives the wheel but how much motion the wheel gives the sticks; especially a weighted stick.

I am going to guess that a mass, on the end of the stick, of about one fourth the total mass would stop the wheel when the mass swings out. If Newtonian Physics (The Law of Conservation of Momentum) is correct that means that the mass would have to be moving four times as fast: and the energy (1/2mv²) would be four times as high.

[rlortie]

Put a mass on the end of the stick.

pequaide, you are not helping matters! :-)

It is rather obvious here that Ealadha would be better offer to unplug his surge protector from the wall outlet and plug it into itself.

@ Alex,

If you want help from me, my suggestion is that you bail out of this and get your music lessons in order. Education, occupation and family priorities come before involvement with this nonsense.

Ralph

[Ealadha]

deleted

[Ealadha]

deleted

[Richard]

I,m siding with Ralph at this point...Maybe I'm just confused...where is the Prime mover here..

Even in Newtonian Physics conservation of momentum gets shakey at less than light speeds. Gravity is center of the mass Mass is not the center of gravity. Here is where I,m confused and do not mind clarification or correction...Are you suggesting that accelerating the 1/4 mass to a point where the entire mass acceleration is destroyed at the axis is somehow reset

seriously I do see this as a yo-yo and most sincerely mean no disrespect..

confused

richard

[rlortie]

Richard,

The prime mover is you! standing in the circle pulling the stick back in. Forget it there is nothing here for a PM wheel enthusiast.

Like a mother duck protecting her young, I do not like threads like this leading 'newbies' astray on snipe hunts!

Ralph