Re: What is inertial motion
From: Donald G. Shead (dcshead_at_charter.net)
Date: 07/19/04
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Date: 19 Jul 2004 04:20:45 -0700
"Herman Family" <celcaps@frontiernets.net/without_any_s/> wrote in message news:<VJ0Kc.87$fz4.39@news02.roc.ny>...
> "Donald G. Shead" <dcshead@charter.net> wrote in message
> news:48402bae.0407161808.3e26611e@posting.google.com...
> > "Herman Family" <celcaps@frontiernets.net/without_any_s/> wrote in message
> news:<CwRJc.40$SV.27@news01.roc.ny>...
> > > Rather than debate your logic, I think it would be better to test it
> > > directly and provably. The great thing about physics is that it is very
> > > scalable. The concepts around the movements of the heavens can be
> tested by
> > > a three year old with a yoyo, though the three year old might not
> understand
> > > the math behind it.
> > >
> > It's obvious that you don't understand it much better than the three
> > year old Michael: The scalable reproducible experiment that you
> > propose must be done so that it is mathematically consistent: You
> > can't do it quite the way you make it sound.
> >
> > First of all a weight cannot be induced to spin in a circle 'around
> > your hand' unless your hand rotates in a circle itself to give
> > impetus: To lead the weight; to induce the spinning motion. If you
> > have ever used a sling, like David used to kill Goliath, you can see
> > that the hand that wields it swings about the shoulder, and the speed
> > of the object in the delivery end of the sling depends a great deal on
> > the strength of that hand being great enough to induce, and provide
> > considerable velocity to the projectile.
>
> Oh, it isn't mathematically consistent? Lets make it more consistent.
> After you start the object spinning, around your hand at some distance, stop
> moving your hand. Hold it absolutely stationary. You only have to do that
> for a moment, perhaps a third of a rotation. Then let go of the string.
> What happens? If you are correct, the weight will continue to spin around
> your hand. If Newton was correct, it will go in a straight line from the
> circle.
How do you aim the weight so that it will hit Goliath? It's that last
fling that counts: Gives the stone exact direction and maximum clout.
It's an art, and requires lots of practice.
Besides, you lunkhead, you are trying to lead me to prove somrthing
that I don't even believe: Inertial motion is neither Newton's
straight line motion, nor is it circular. Both of which require some
kind of guidance: A straight and level floor or a gun barrel will
guide a missal in a straight line for a while, and a string or a
centrifuge will guide it in a circle. Take those away, and you get
inertial motion: Either free fall or orbit; depending on the speed:
Speeds less than escape velocity will result in free fall; speeds
greater than escape velocity will result in orbital motion.
Inertial motion, or what I call Free (inertial) Motion is the relative
motion of bodies that are unrestrained; orbiting and free falling
around each other. This has been going on for millions of years.
Have I gotta draw you a diagram?
> > Shead <dcshead@charter,net
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