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Re: 4/3 problem resolution/Action-reaction paradox in pdf format

----- Original Message -----
From: "David Rutherford" <drutherford@SOFTCOM.NET>
To: <PHYS-L@lists.nau.edu>
Sent: Monday, June 18, 2001 4:56 PM
Subject: Re: 4/3 problem resolution/Action-reaction paradox in pdf format

On Mon, 18 Jun 2001 10:51:55 -0400, Bob Sciamanda <trebor@VELOCITY.NET>

wrote:

David,
Sorry, in my haste I did not notice the words "both frames" in your post
(below). The general proof shows that momentum is conserved in inertial
frames. We do not expect momentum to be conserved in non-inertial
frames.

Are you saying that the momentum of the particles+fields is not
conserved in non-inertial frames?

Yes!

Suppose I am in a room with a pool table on which sits a set of pool balls,
at rest with respect to the table and the room. If I now go into some
erratic motion (eg., do a somersault) so that I become a non-inertial
observer, I will observe that the momentum of the pool ball system changes
in time (is not conserved) as observed from my non-inerial frame. So why
should I expect the momentum of a fields+particles system to be constant as
viewed from my non-inertial frame?

Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
www.velocity.net/~trebor