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Re: RollerCoasters
Posted By: AhrumanDate: 12/14/01 8:36 a.m.

In Response To: Re: RollerCoasters (Steve Levinson)

: Sorry, but you're talking to a physician and an engineer (I was an
: overachiever in my spare time). Linear motion is relative, but angular
: motion is an entirely different matter. To put it in relativistic terms
: (i.e. any frame of reference is as good as any other), nothing can be
: conceived of as being at rest if its is rotating - you can't expect the
: entire universe to be spinning while you are stationary. The internal ear
: has exquisitely sensitive hair cells in the semicircular canals that are
: designed to detect angular mation in 3 dimensions (the 3 canals are
: perpendicular to each other - I couldn't have designed a better sensor
: myself). Unfortunately, there is substantial crossover between the
: associated sensory nuclei and the vagus nerve, which stimulates the gut.
: Hence, excessive motion causes nausea and vomiting.

Sorry, but you're wrong. I've been in a sufficiently fast centrifuge for the floor level to be non-tangiental to gravity, and apart from the weird visual effects it felt like accelerating upwards (or higher gravity). Similar mechanisms are used by pilots and astronauts to train for high linear accelerations.

The inner ear measures angular acceleration (torque? can't remember the English terminology), not angular velocity. if you work out the forces acting on someone standing in a centrifuge in a 0-g environment, then _with respect to the person, who is also rotating_, the resultant force is outwards, and the outside of the centrifuge becomes the floor.

The effect is indistinguishable from acceleration or gravity for any given point, although of course for a larger area it is appearant that one is inside a cylinder (just as acceleration is a plane, and gravity is the outside of a sphere). Also, there will be strange visual effects (people walking on the floor and cieling).

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Pre-2004 Posts

Replies:

What kind of Chemical freak designed the MARAHTON?Ernie TMBM 12/12/01 4:30 p.m.
     Just an addendumErnie TMBM 12/12/01 4:35 p.m.
           This is normal.Djof 12/12/01 5:01 p.m.
     Re: What kind of Chemical freak designed the MARAHSiliconDream =PN= 12/12/01 6:27 p.m.
           Re: What kind of Chemical freak designed the MARAHSNoblitt 12/12/01 7:41 p.m.
           Re: What kind of Chemical freak designed the MARAHSteve Levinson 12/12/01 8:37 p.m.
                 Re: What kind of Chemical freak designed the MARAHSiliconDream =PN= 12/12/01 10:15 p.m.
                       Re: What kind of Chemical freak designed the MARAHSteve Levinson 12/13/01 5:00 a.m.
                             Re: What kind of Chemical freak designed the MARAHDjof@School 12/13/01 5:59 a.m.
                                   Re: What kind of Chemical freak designed the MARAHget azure 12/13/01 7:26 a.m.
                                         Re: What kind of Chemical freak designed the MARAHSteve Levinson 12/13/01 10:31 a.m.
                                               RollerCoastersDjof@School 12/13/01 11:36 a.m.
                                                     Re: RollerCoastersSteve Levinson 12/13/01 1:15 p.m.
                                                           Re: RollerCoastersTrahojen 12/14/01 3:41 a.m.
                                                                 Re: RollerCoastersSteve Levinson 12/14/01 7:54 a.m.
                                                           k then :)Djof@School 12/14/01 7:03 a.m.
                                                           Re: RollerCoastersAhruman 12/14/01 8:36 a.m.
                                                                 Re: RollerCoastersSteve Levinson 12/14/01 10:15 a.m.
                                                                       Re: RollerCoastersDjof 12/14/01 12:31 p.m.
                                                                             Re: RollerCoastersSiliconDream =PN= 12/14/01 5:24 p.m.
                                                                       Re: RollerCoastersRampant Document 12/15/01 6:03 a.m.
                                                                 Re: RollerCoastersSiliconDream =PN= 12/14/01 5:23 p.m.
                             Re: What kind of Chemical freak designed the MARAHSiliconDream =PN= 12/14/01 12:27 a.m.
                                   Re: What kind of Chemical freak designed the MARAHget azure 12/15/01 6:06 a.m.
                                         Re: What kind of Chemical freak designed the MARAHTru7h 12/15/01 7:03 a.m.
                                               Re: What kind of Chemical freak designed the MARAHRincewind MoG 12/15/01 8:27 a.m.
                                                     Re: What kind of Chemical freak designed the MARAHSteve Levinson 12/15/01 10:08 a.m.
           Chemical freaks indeedElectricSheepOne 12/16/01 10:55 a.m.
                 You're right - I remember that *NM* *NM*Steve Levinson 12/16/01 11:12 a.m.
     Re: What kind of Chemical freak designed the MARAHVid Boi 12/13/01 12:47 a.m.
           Re: What kind of Chemical freak designed the MARAHSteve Levinson 12/13/01 4:38 a.m.
                 Re: What kind of Chemical freak designed the MARAHShnu 12/14/01 7:08 p.m.
                       Re: What kind of Chemical freak designed the MARAHSiliconDream =PN= 12/14/01 11:43 p.m.
                             Re: What kind of Chemical freak designed the MARAHAhruman 12/15/01 9:48 a.m.
                                   Re: What kind of Chemical freak designed the MARAHSiliconDream =PN= 12/15/01 3:25 p.m.
     Re: What kind of Chemical freak designed the MARAHMark Levin 12/16/01 11:10 a.m.



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