Re: Newtons Laws


"Uncle Al" <UncleAl0@xxxxxxxxxxxxx> wrote in message news:47F008B6.679558D0@xxxxxxxxxxxxxxxx
kronecker@xxxxxxxxxxx wrote:

Actually I just wondered if there is a use for the third derivative of
position. I heard it named as "jerk" in an engineeringh application.
Why is it never used? Is it zero in most cases? What about higher
derivatives.?

The Time Derivatives of Distance

Derivative Name times Mass
===================================
0th position mass
1st velocity momentum
2nd acceleration force
3rd jerk yank
4th snap tug
5th crackle snatch
6th pop shake

First off, automotive drive train and suspension engineers
constantly work with "jerk".

( Engineers on large taxpayer funded physics programs
also work with "jerks".) ;-)) ( Funny but true.)

I supposed that whip and flag manufacturers
work with "snap".

Secondly, the correct time derivatives of mass follw.

Time derivatives of distance and mass
===================================
0th position mass
1st velocity mass flow
2nd acceleration spring constant
3rd jerk Poynting Vector
4th snap (shake)
5th crackle (rattle)
6th pop (roll)

I call these derivatives shake, rattle, and roll, as I don't know if they have formal names.

--
Tom Potter

http://www.geocities.com/tdp1001/index.html
http://notsocrazyideas.blogspot.com
http://groups.msn.com/PotterPhotos

.

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