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    Re: Gyro sextant
    From: Bruce Cutting
    Date: 2019 Jan 26, 17:47 -0700

    Actually, when I was in grade school, we had several NSF presenters come
    and do demonstrations on physical science concepts.  The gyroscope was
    aptly shown with a bicycle wheel and a "lazy susan" turntable.
    
    It would take a bit more time to explain the top, but at lease we can
    eliminate magic as the basic explanation.  I recently sent 3 links, one of
    which is relatively simple.
    
    
    On Sat, January 26, 2019 15:46, Brad Morris wrote:
    > Bill
    >
    >
    > You wrote:
    >
    >
    > but they must be explained in a way that a twelve-year-old could easily
    > follow.
    >
    > So here is my new explanation:
    >
    >
    > The gyro stands straight up, due to magic!
    >
    >
    > But really kids, when you grow up and understand such topics as inertia,
    > torque, sliding friction, mass, moments and vector analysis, then and only
    >  then will you have the tools to evaluate what is happening.  [The
    > reference to the proper textbook should replace this sentence].
    >
    > Bill, a 12 year old may be lucky to have some algebra, but certainly no
    > trigonometry.  Spinning objects, inertia and torque will come much, much
    > later in their educational career, like a college level course in
    > mechanisms.  Vector analysis would be university mathematics major.  If
    > you insist that a 12 year old understand it, then "magic" is a good as an
    > answer as any.
    >
    > A more responsible answer will simply refer those who are truly
    > interested (in the physics, mechanics and math required) to the dang
    > textbook.  Other than that, there simply isn't a simple answer.  That a 12
    > year old can understand??  Hahahahaha!
    >
    > Brad
    >
    >
    >
    >
    > On Sat, Jan 26, 2019, 4:47 PM Bill Morris 
    >
    >> An interim thank you to all those who have so far responded to my
    >> original post.
    >>
    >> I have in mind to do a couple of experiments in response to some of the
    >>  points raised and will report  on them as soon as I am able.
    >> Meanwhile,
    >> please keep on commenting.
    >>
    >> For those who might be after the prize, and only Sean C has tried for
    >> it so far, I will permit the use of "vector" and "resultant", but they
    >> must be explained in a way that a twelve-year-old could easily follow.
    >>
    >> Bill Morris
    >>
    >>
    >> Pukenui
    >>
    >>
    >> New Zealand
    >>
    >>
    >> View and reply to this message
    >> 
    >>
    >>
    >
    >
    > View and reply to this message:
    > http://fer3.com/arc/m2.aspx/Gyro-sextant-Morris-jan-2019-g44118
    
    
    

       
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