🚀 go-pugleaf

I think you must decide whether the flight of the bird is due to bernuli
(SP?) principle or not.  If the lift is due to the pressure differential,
then the weight is effectively removed from the box, reguarless of
whether the box is around the bird or not.  If it is due to downward
force of air (as is common to initial bird flight because they don't have
the airspeed to fly yet) then the weight of the box remains the same as
if the bird were standing in the box.

On Sat, 26 Nov 1994, Michael Feinberg wrote:

> Does the force of the air downward from the birds' wings equal or exceed
> the weight of the bird(s). Therefore the same situation prevails, [I think].
>
> On Wed, 23 Nov 1994, Hal Repasky wrote:
>
> > Dear Instructors,
> >      My name is Steve, and I am a student of Mr. Repasky's advanced
> > physics class at Seneca Valley Senoior High School.  During class, I
> > posed this question to the class, and we would appreciate any responses
> > that you may have:
> >
> >         If one has a half-ton pickup, and a box containing one ton of
> > birds was placed in the bed of the truck, the load would be too heavy
> > for the truck to move.  But what would happen if the box was beaten
> > with a stick, causing at least half of the birds to start to fly inside
> > the box, since the pickup can haul one half of a ton.  Would the truck
> > be able too move?  Would the same result occur if the situation was
> > identical, but took place in an airplane?
> >
>