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On the Lighter Side => New Theories => Topic started by: VictorEliasEspinozaGuedez on 28/12/2014 15:20:43

Title: I succeeded in touching distance:
Post by: VictorEliasEspinozaGuedez on 28/12/2014 15:20:43

(https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fimg.webme.com%2Fpic%2Ft%2Ftheory-espinoza%2Ftouch-distance.jpg&hash=0d5eadc3295676c8ab565d130e4af710)

Title: Re: I succeeded in touching distance:
Post by: VictorEliasEspinozaGuedez on 28/12/2014 15:21:13

Quantified...

I used a disk CD and a motor of 1.5 volts.

I placed a plastic lid for the test on the CD.

With the same force of the fingers, turn the CD towards the two sides.

One side rotates twice and the other side rotates 1 and 1/2.

Are shown to the CD stops turning to one side.

(I will continue measuring).

Very affectionately,
Víctor Elias Espinoza Guedez
27 December 2014

Title: Re: I succeeded in touching distance:
Post by: David Cooper on 28/12/2014 19:01:35

Okay, I've got the cat cooked and in the dish. I've tried turning it lots of different ways. What do I do next? Should I eat it while it's still hot.

Title: Re: I succeeded in touching distance:
Post by: RD on 28/12/2014 23:20:01

Quote from: VictorEliasEspinozaGuedez on 28/12/2014 15:20:43

[ Invalid Attachment ]

The moment of inertia (http://en.wikipedia.org/wiki/Moment_of_inertia) of an object depends on the way you rotate it : rotating it one way can be easier than rotating it another way , even though its weight remains the same ,

e.g. Picking up a broom-handle which is lying on the floor is easier when you hold it in the middle than when you hold it at the end , even though it still weighs the same , ( no black holes required).

see ... http://en.wikipedia.org/wiki/List_of_moments_of_inertia
  [ search for the word "about" and "axis" on that wikipedia page ].

Title: Re: I succeeded in touching distance:
Post by: VictorEliasEspinozaGuedez on 29/12/2014 02:02:39

It is how blowing sideways.

Title: Re: I succeeded in touching distance:
Post by: RD on 29/12/2014 09:10:11

Put it another way , twirling a rod like a majorettes baton is easier than waving the same rod like a magic wand ...

 [ Invalid Attachment ]

http://en.wikipedia.org/wiki/List_of_moments_of_inertia#List_of_3D_inertia_tensors

Title: Re: I succeeded in touching distance:
Post by: VictorEliasEspinozaGuedez on 29/12/2014 09:30:28

Quote from: RD on 29/12/2014 09:10:11

Put it another way , twirling a rod like a majorettes baton is easier than waving the same rod like a magic wand ...

 [ Invalid Attachment ]

http://en.wikipedia.org/wiki/List_of_moments_of_inertia#List_of_3D_inertia_tensors

These are not flat dishes

Title: Re: I succeeded in touching distance:
Post by: RD on 29/12/2014 16:34:57

Quote from: VictorEliasEspinozaGuedez on 29/12/2014 09:30:28

These are not flat dishes

The same principle applies to a dish, or any shape : rotating it about one axis can be more difficult than rotating it about another because of the different moments-of-inertia ...

 [ Invalid Attachment ]
http://hyperphysics.phy-astr.gsu.edu/hbase/tdisc.html

Title: Re: I succeeded in touching distance:
Post by: VictorEliasEspinozaGuedez on 29/12/2014 18:33:10

Quote from: RD on 29/12/2014 16:34:57

Quote from: VictorEliasEspinozaGuedez on 29/12/2014 09:30:28

These are not flat dishes

The same principle applies to a dish, or any shape : rotating it about one axis can be more difficult than rotating it about another because of the different moments-of-inertia ...

 [ Invalid Attachment ]
http://hyperphysics.phy-astr.gsu.edu/hbase/tdisc.html

I say turn the disk how a ventillador.