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Re: "Opposite spin"

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From Sylvia Else <sylvia@not.at.this.address>
Newsgroups sci.physics
Subject Re: "Opposite spin"
Date Tue, 27 Sep 2016 15:24:28 +1000
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On 25/09/2016 9:19 PM, john wrote:
> People talk about "opposite spin".
> Look at a Ferris wheel from one side,
> it is rotating one way.
> Look at it from the other side,
> it is rotating the other way.
> Just perspective.
>

If you represent the spin as a vector, then you'll discover that the 
vector is the same regardless of which side of the wheel you're looking 
at. On one side, the vector points towards you. Move round to the other 
side, and now it points away from you.

Put a second wheel beside the first, and spin it in the opposite 
direction. It's vector is in the opposite direction to the first, and no 
amount of moving around the wheels will make the vectors point in the 
same direction.

So it's not just a matter of perspective.

Sylvia.

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Thread

"Opposite spin" john <johnsefton288@gmail.com> - 2016-09-25 04:19 -0700
  Re: "Opposite spin" moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-09-25 16:44 +0000
    Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-25 10:05 -0700
      Re: "Opposite spin" moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-09-26 01:26 +0000
        Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-26 05:10 -0700
          Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-26 05:16 -0700
            Re: "Opposite spin" moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-09-26 16:57 +0000
              Re: "Opposite spin" "hanson" <hanson@quick.net> - 2016-09-26 10:11 -0700
                Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-26 12:20 -0700
                Re: "Opposite spin" "hanson" <hanson@quick.net> - 2016-09-26 12:37 -0700
                Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-26 13:34 -0700
                Re: "Opposite spin" "hanson" <hanson@quick.net> - 2016-09-26 14:58 -0700
                Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-27 06:11 -0500
                Re: "Opposite spin" poraty350@gmail.com - 2016-09-27 04:42 -0700
    Re: "Opposite spin" poraty350@gmail.com - 2016-09-27 04:39 -0700
  Re: "Opposite spin" Double-A <double-a3@hush.com> - 2016-09-25 13:15 -0700
    Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-25 13:38 -0700
      Re: "Opposite spin" Double-A <double-a3@hush.com> - 2016-09-25 14:50 -0700
        Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-25 17:37 -0700
          Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-26 08:13 -0500
            Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-26 06:52 -0700
              Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-26 09:05 -0500
              Re: "Opposite spin" Double-A <double-a3@hush.com> - 2016-09-26 14:43 -0700
  Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-25 16:44 -0500
  Re: "Opposite spin" "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-09-25 15:35 -0700
    Re: "Opposite spin" "hanson" <hanson@quick.net> - 2016-09-25 16:09 -0700
  Re: "Opposite spin" "nuny@bid.nes" <Alien8752@gmail.com> - 2016-09-26 15:06 -0700
    Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-26 17:28 -0700
      Re: "Opposite spin" moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-09-27 01:07 +0000
        Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-26 19:46 -0700
          Re: "Opposite spin" moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-09-27 03:13 +0000
      Re: "Opposite spin" "nuny@bid.nes" <Alien8752@gmail.com> - 2016-09-26 18:18 -0700
        Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-26 19:49 -0700
          Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-27 09:03 -0500
            Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-27 07:08 -0700
              Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-27 09:21 -0500
                Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-27 07:41 -0700
                Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-27 10:12 -0500
                Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-27 11:18 -0500
                Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-27 09:29 -0700
                Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-27 12:10 -0500
                Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-27 10:18 -0700
                Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-27 12:24 -0500
                Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-27 13:07 -0700
                Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-27 16:06 -0500
                Re: "Opposite spin" poraty350@gmail.com - 2016-09-28 00:08 -0700
                Re: "Opposite spin" poraty350@gmail.com - 2016-09-28 00:01 -0700
                Re: "Opposite spin" moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-09-29 01:51 +0000
                Re: "Opposite spin" HVAC <mr.hvac@gmail.com> - 2016-09-29 06:23 -0700
                Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-29 07:41 -0700
          Re: "Opposite spin" "nuny@bid.nes" <Alien8752@gmail.com> - 2016-09-27 17:51 -0700
            Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-27 18:05 -0700
              Re: "Opposite spin" moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-09-28 03:42 +0000
              Re: "Opposite spin" "nuny@bid.nes" <Alien8752@gmail.com> - 2016-09-28 02:24 -0700
              Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-28 09:36 -0500
                Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-28 10:54 -0700
                Re: "Opposite spin" Odd Bodkin <bodkinodd@gmail.com> - 2016-09-28 14:37 -0500
              Re: "Opposite spin" "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-09-29 11:54 -0700
                Re: "Opposite spin" "hanson" <hanson@quick.net> - 2016-09-29 11:59 -0700
            Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-27 18:12 -0700
              Re: "Opposite spin" john <johnsefton288@gmail.com> - 2016-09-27 19:10 -0700
              Re: "Opposite spin" moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-09-28 03:49 +0000
    Re: "Opposite spin" moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-09-27 01:02 +0000
  Re: "Opposite spin" Sylvia Else <sylvia@not.at.this.address> - 2016-09-27 15:24 +1000
    Re: "Opposite spin" noTthaTguY <abu.kuanysh05@gmail.com> - 2016-09-27 14:07 -0700

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