[geocentrism] Re: Uranus

From: "philip madsen" <pma15027@xxxxxxxxxxxxxx>
To: <geocentrism@xxxxxxxxxxxxx>
Date: Tue, 9 Dec 2008 09:49:12 +1000

Alan If I am a stupid student, then you are like the incompetent teacher I have 
often known, who fails to help the student understand. If I fail to understand 
it is the teachers fault not the stupid students. 

At least thats how I judged myself when in the business of instructing classes. 
 

I am having one last attempt. Pure mechanical  rotations no liberations, (am 
already liberated) what ever that is . 

So may I take the chalk and in front of the class ask the teacher to answer a 
sequence of questions over the following diagrams . Please answer in the space 
provided, so that all the class of varying stupidities may really understand. 

Class lesson on motion



This diagram represents a disc top like kids spin. It is set to spin at 500 rpm

This question may sound stupid, but for stupid onlookers will you agree that 
the 

Ball at the top is spinning 500rpm as well as the arrow bearing at the bottom. 

 

Tick   YES             or           NO

 



Now we have set the top gyrating as happens when it is put off balance. 

The shaft is still made to spin at 500 rpm but in addition the ball is now 
moving in

An orbit as shown by the arrowed circle above it, at 100 orbits per minute. 

 

Do you agree that as the shaft and bearing point is still rotating at 500 rpm

the ball likewise is still spinning (rotating) 500 rpm. 

 

tick      YES                             NO

 

do you agree then that there are two motions of the ball.  One rotating at 
500rpm

and the other orbiting (translating) at 100 orbits per minute. 

 

Tick     YES                             NO



So far everybody should have answered yes to all questions. 



From here I want you to relook at this demonstration from the beginning and 
alter

the rate of rotation of the top to spin at 100 rpm, and keep the orbits at 100 
orbits per minute. 

They are synchronised. This is the only change we make. 



Will the ball now present the same face to the centre of the orbit?   Difficult 
for anyone to visualise?.  

then try it with the spin of the shaft just One rpm and the orbit just one 
orbit per minute. 



Of course the answer is yes. And we have two separate motions. Please note I 
have always said motions, not 

rotations. the ball rotates, once and it orbits or tramslates once. Two 
separate motions. 



From here perhaps we can jump from simple mechanics to celestial motions, and 
consider the moon. 



Allen if you have an objection and must answer No at any point down this page, 
please note your reason in the 

appropriate place. 



Philip. 

  ----- Original Message ----- 
  From: allendaves@xxxxxxxxxxxxxx 
  To: geocentrism@xxxxxxxxxxxxx 
  Sent: Tuesday, December 09, 2008 1:21 AM
  Subject: [geocentrism] Uranus


        Rotaion: A progressive Radial oreintaion to a common point......?!

        Gee wiz wiz Phil are you and Paul both having a bout of 
stupenditis?!…Things move in a direction and way such that way that its effects 
would follow the spokes on a “wheel” (Perfect circle or not) That is a radial 
orientation!……That radial motion is defined wrt a common point aka the hub of 
that same wheel!……… (like the center of mass or geometric center) 

         

        It is not that hard...in fact you might could even say "it is self 
evident"!?

Attachment: disc top vert.GIF
Description: GIF image

Attachment: gyrating top.GIF
Description: GIF image

References:
- [geocentrism] Uranus
  - From: allendaves

[geocentrism] Re: Uranus

Other related posts: