Re: Flaws wanted

From: RP (no_mail_no_spam_at_yahoo.com)
Date: 03/28/05 

Date: Sun, 27 Mar 2005 22:55:46 -0600

OsherD wrote:

>>>From Osher Doctorow
>
> I think that the original author of the thread asked to explain why
> mass isn't a vector.
>
> Vectors in Euclidean geometry have directions in ordinary language.
> For example, when you drive a car or walk in the street or on the
> sidewalk, you go in a particular direction with a particular speed, and
> that defines a velocity vector v (written in boldface or with an arrow
> above it to indicate that it is a vector). Its magnitude is either
> written /v/ or v in non-boldface print or without an arrow on top of
> it. Since all vectors are parallel to vectors beginning at the origin
> (with tails at (0,0,0) in 3-dimensional Euclidean space), any vector in
> 3-dimensional Euclidean space can be represened as (x, y, z) which is
> the vector that starts at the origin (0, 0, 0) where the coordinate
> axes meet and has its tip or arrowhead on the point (x, y, z) such that
> the perpendicular line segments from the point to the x-axis, y-axis,
> and z-axis respectively hit those axes at the points labelled x, y, an
> z.
>
> Nobody has found a direction for mass. Weight has a direction
> (downward toward the Earth vertically roughly speaking) but weight is a
> force or pull of gravity near the Earth for example, and weight = mg (m
> times g) where m is mass and g is the acceleration due to gravity. g
> is constant near the surface of the Earth more or less. Acceleration
> is the change of velocity as time changes, and since velocity is a
> vector and time isn't usually taken as a vector, acceleration is a
> vector. Since mg already has g as a (relatively constant) vector, mg
> doesn't "need" a second "vector m" to have a direction.
>
> If you find a direction for mass, let me know. I have people who will
> pay top dollar for it. :>)
>
> Osher

http://www.google.com/search?hl=en&q=%22transverse+mass%22&btnG=Google+Search

Richard Perry

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