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Re: [Phys-l] (no subject)



For completeness, it should be pointred out that there is a fundamental
difference between Joe’s embodiment (neutrino/earth) and mine (infinite
masses).
I modeled “unstoppable/immovable” by using inmfinite masses in a real
interaction, involving real forces.
Joe’s embodiment achieves “unstoppable/immovable” by employing two objects
with NO interaction mechanism.
If you remove the possibility of any interactive forces, then “unstoppable”
and “immovable” will follow, but with new meanings.

This semantic twist should be pointed out if these two embodiments are
presented to students.

I must repeat: the whole subject is physics swimming in semantics (PHUN!).

From: Dr. Richard Tarara
Sent: Wednesday, February 23, 2011 11:45 AM
To: Forum for Physics Educators
Subject: Re: [Phys-l] (no subject)
Also interesting that using Joe's neutrino as the unstoppable object, the
result is the same NOTHING happens.

;-) Ricl


----- Original Message -----
From: "Bob Sciamanda" <treborsci@verizon.net>
To: <phys-l@carnot.physics.buffalo.edu>
Sent: Wednesday, February 23, 2011 11:40 AM
Subject: Re: [Phys-l] (no subject)


Playing with words =>

Marc’s observation: (“. . . the definitions of the two objects are
mutually exclusive. “)

is interesting, and just the opposite of the thinking in my recent post on
this thread =>

Regarding their kinetic behavior in the simplified collision which I
considered, I used an infinitely massive
point object to be each : the unstoppable object and the immovable object.
So in my model they are far from mutually exclusive - they are identical :-)
As infinitly massive point objects with no other intrinsic properties, they
are indistinguishable.

So when these two indistinquishable objects exchange velocities,
effectively NOTHING has happened.
There are still an immovable object at rest, and an unstoppable object with
velocity v1.

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Bob Sciamanda
Physics, Edinboro Univ of PA (Em)
treborsci@verizon.net
http://mysite.verizon.net/res12merh/





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