Instantaneous reactions??
Posted: Mon Aug 02, 1999 6:16 pm
Jum Hines wrote in SD2299:
>Just a little point on instantaneous feedback. I think there is a (single?)
>class of examples in which simultaneity exists in the real world. If you
>push down on a table, doesnt the table instantaneously push up against you?
>
No. The table does not push back until it has been depressed enough to
create a restraining elastic force. Likewise, the finger does not generate
a force until it has been stressed. Viewed from a sufficiently short time
scale, there are forces creating stored energy and displacement.
---------------------------------------------------------
Jay W. Forrester
From: "Jay W. Forrester" <jforestr@MIT.EDU>
Professor of Management, Emeritus
and Senior Lecturer, Sloan School
Massachusetts Institute of Technology
Room E60-389
Cambridge, MA 02139
tel: 617-253-1571
fax: 617-258-9405
>Just a little point on instantaneous feedback. I think there is a (single?)
>class of examples in which simultaneity exists in the real world. If you
>push down on a table, doesnt the table instantaneously push up against you?
>
No. The table does not push back until it has been depressed enough to
create a restraining elastic force. Likewise, the finger does not generate
a force until it has been stressed. Viewed from a sufficiently short time
scale, there are forces creating stored energy and displacement.
---------------------------------------------------------
Jay W. Forrester
From: "Jay W. Forrester" <jforestr@MIT.EDU>
Professor of Management, Emeritus
and Senior Lecturer, Sloan School
Massachusetts Institute of Technology
Room E60-389
Cambridge, MA 02139
tel: 617-253-1571
fax: 617-258-9405