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Greetings, I've read each of the interesting discussions dealing with
Newton's laws, vectors, etc.
Over my years of teaching I have put together some power points dealing
with the topics. I'm just wondering how much is OK and how much needs
revision.
If you go to my website listed below select a column Operation Physics.
Select 06 Newtons third law and then 06 investigations, power points and
articles.
What I am referring to is some of the power points that I have included.
Any revisions needed?
So I sit back and wait for the responses.
Have a Great Day
Website rheckathorn.weebly.com
On Aug 20, 2016, at 6:35 PM, Bob Sciamanda <treborsci@verizon.net>wrote:
calculational models of physical properties.
Scalars, Vectors and Tensors are MATHEMATICAL entities - used as
There is a dangerous, but natural tendency to reify these MATHEMATICALentities. Fight it!
MODEL
-----Original Message----- From: Bob Sciamanda
Sent: Saturday, August 20, 2016 6:19 PM
To: Phys-L@Phys-L.org
Subject: Re: [Phys-L] treating force as a vector ... consistently
Correction:
My paraphrase should read:
It makes no sense to tell students that NUMBER is
a QUANTITY and then turn around and ask them to distinguish a NUMBER
"here" from a NUMBER "over there". It is a crime against the laws
of mathematics.
Bob Sciamanda
Physics, Edinboro Univ of PA (Em)
treborsci@verizon.net
www.sciamanda.com
-----Original Message----- From: Bob Sciamanda
Sent: Saturday, August 20, 2016 6:09 PM
To: Phys-L@Phys-L.org
Subject: Re: [Phys-L] treating force as a vector ... consistently
JD complained:
"It makes no sense to tell students that force is
a vector and then turn around and ask them to distinguish a force
"here" from a force "over there". It is a crime against the laws
of mathematics."
Let me paraphrase this remark:
It makes no sense to tell students that QUANTITY is
a NUMBER and then turn around and ask them to distinguish a QUANTITY
"here" from a QUANTITY "over there". It is a crime against the laws
of mathematics.
Like QUANTITY, VECTOR is a mathematical entity used as a calculational
to represent a property of an entity.magnitude
Just as the QUANTITY 2 can represent a property of my legs, the same
QUANTITY 2 can represent the number of major American political parties -
so the VECTOR F can represent several different forces (equal in
and direction). They are identical mathematical entities, but are usedas
models of different physical entities.
Bob Sciamanda
Physics, Edinboro Univ of PA (Em)
treborsci@verizon.net
www.sciamanda.com
_______________________________________________
Forum for Physics Educators
Phys-l@www.phys-l.org
http://www.phys-l.org/mailman/listinfo/phys-l
_______________________________________________
Forum for Physics Educators
Phys-l@www.phys-l.org
http://www.phys-l.org/mailman/listinfo/phys-l
Bob Sciamanda
Physics, Edinboro Univ of PA (Em)
treborsci@verizon.net
www.sciamanda.com
_______________________________________________
Forum for Physics Educators
Phys-l@www.phys-l.org
http://www.phys-l.org/mailman/listinfo/phys-l
_______________________________________________
Forum for Physics Educators
Phys-l@www.phys-l.org
http://www.phys-l.org/mailman/listinfo/phys-l