Re: Apocalypse NOW!

Abhi,
so are you just going to ignore what I wrote?

I posted an explanation of why it doesn't work. With details. If you believe
you are correct, I have provided everything  you need to point out the flaw
in my reasoning. If you can, please do so. But you can't complain that
nobody listens to you when you don't listen to what anybody else says

Krill

"Abhi" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> "Bored Huge Krill" <[EMAIL PROTECTED]> wrote in message
news:<[EMAIL PROTECTED]>...
> > Abhi,
> > your math/physics is faulty. The device will not float to the ceiling
and
> > stay there, unless you nail it up. It will accelerate towards the floor
at
> > approximately 9.8 meters per second squared.
> >
> > Your error is in assuming that the forces from the springs acting at
your
> > point B cancel out. They don't. The restoring forces from the springs
(I'll
> > call each of those F here, but you can call them what you want) must be
> > summed as a vector. You can use many methods to do this, but I'll use
your
> > cartesian coordinate system. I'll call the angles ABD/CBD, BDA/BDC and
> > DAB/DCB alpha, beta and gamma respectively (but again you can call them
what
> > you want). In that case, the two forces acting at point B from the left
and
> > right hand springs can be written as:
> >
> > {-Fsin(alpha),-Fcos(alpha)} and
> > {Fsin(alpha),-Fcos(alpha)} respectively
> >
> > net force acting on point B from the springs is therefore
> >
> > { 0, -2Fcos(alpha) }
> >
> > the component of forces along your x axis does indeed cancel. But the
> > component acting along your y axis does not. There is a net force acting
on
> > point B towards point D.
> >
> > If you do the same calculation for point D, you'll find a net force
acting
> > on that point of equal magnitude but of opposite sign. In other words,
there
> > is no net force acting on the rod BD. No unitary force.
> >
> > Sorry, but it doesn't work
> >
> > Krill
>
> I relate myself to Tom Hank in that movie, "CAST AWAY". You people are
> like that volleyball "Wilson". I am talking to people who lack
> consciousness. Now I am lost at sea and I am going to lose you...
>
> I am sorry, Wilson. Sorry..
>
> -Abhi.