Re: Electric gun, WORK ENERGY

[Ludwik Kowalski <KowalskiL@MAIL.MONTCLAIR.EDU>]

At any time Fnet=Fcoul-f. The constant negative part
becomes dominant at large distances. A negative net
force produces negative acceleration, opposite to what
it is when the Fcoul is dominant. The projectile looses
speed till it is stopped. Right?

brian whatcott wrote:

> At 07:46 11/20/99 -0500, Ludwik wrote:
> ///
> > It is probably appropriate to think that the emission of e.m. waves
> > is a thermalizing (dissipative) process, as far as mechanical energy
> > is concerned. If the removal of the mechanical energy were due to
> > a constant force f, such as friction, then the bullet would be stopped
> > somewhere. (The acceleration becomes negative after the coulomb
> > force becomes smaller than f.)
>
> I don't think so. (The last quoted sentence, that is.)
>
> brian whatcott <inet@intellisys.net>
> Altus OK