Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
Herb,
How does the seat of your chair have "the brains or the muscles" to
push up on your fanny and keep you from falling?
Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
www.velocity.net/~trebor
----- Original Message -----
From: "Herbert H Gottlieb" <herbgottlieb@JUNO.COM>
To: <PHYS-L@lists.nau.edu>
Sent: Tuesday, April 25, 2000 10:55 PM
Subject: Re: Wave phase reversal on reflection
On Tue, 25 Apr 2000 22:16:12 -0400 Bob Sciamanda<trebor@VELOCITY.NET>
writes:upward
Yes, but what is the physical mechanism whereby the cancelling,
reflected wave is generated? Perhaps something like: When an
termination, thegoing vertical pulse on a rope encounters a rigid wall
last rope segment exerts andownward
upward force on the wall. The wall responds by exerting a
pull onvertical pulse
the rope segment (by N3), thus starting a downward going
"know"
on the rope.Bob....
An excellent try ! I really like it!!
The only trouble with the explanation above is that students
that a stupid wall does not have the brains or the muscles toexert
a downward pull ....(unless the wall starts to collapse and falldown
whilethe
the string is attached). Perhaps it might be better to say that
rigid wall termination provides a reaction that has the "sameeffect
as a person supplying a downward force on the rope". ......
but I'm sure that someone can provide a much better wording that
I can at the spur of the moment.
Herb
on the