Re: [Phys-l] Student Misconceptions

["Rauber, Joel" <Joel.Rauber@SDSTATE.EDU>]

It's not even clear that the tablecloth demo even demonstrates NTN1 (certainly nothing beyond the demo of setting a book on a table and looking at it over a time interval.)  



> > But the tablecloth demonstration is obviously being done on
> > an earth moving through space at 19 miles/sec. The tableware
> > items are not at rest by any stretch of the imagination.
> >
> >
> > > Most of the demos used for NTN1 just show how something
> > that is at rest
> > > tends to stay at rest.  The usual tablecloth pull is one of
> > them.  So
> > > teachers tend to reinforce the wrong thing.  The ILDs do not have a
> > > demonstration of "a body at rest" and instead always have moving
> > > bodies.