Good to hear. I have been thinking since March last year. First step is to determine if Coreolis or centrifugal acceleration is the case.
David On Jun 15, 2011 10:42 PM, "Stephen A. Lawrence" <sa...@pobox.com> wrote: > > > On 11-06-15 09:03 AM, David Jonsson wrote: >> On Sun, Jun 12, 2011 at 10:50 PM, Stephen A. Lawrence <sa...@pobox.com >> <mailto:sa...@pobox.com>> wrote: >> >> >> >> But using the Newtonian mechanics model itself, if you arrive at >> the conclusion that the box is lighter when the ball is bouncing, >> you can safely conclude that you did something wrong. That's not >> a conclusion you can ever get to from the Newtonian model. >> >> >> OK, sorry, but I also later came with a correction. >> >> Lets change the setup so that the ball bounces sideways. Do you agree >> that it now becomes lighter? This is because the centrifugal forces. >> The increase and decrease does not balance to zero. >> >> Do you also agree that with the sideways bouncing ball there is also a >> small torque on the box, due to the same differences in centrifugal >> acceleration? > > Dunno -- I'm going to have to think about that one, and I haven't had > the time to really understand it. It seemed wrong when a similar > assertion was first posted (months ago) and still seems wrong to me but > I haven't got a proof that it's wrong, so I could be the one who's wrong. >
