Thread View: bit.listserv.physhare
2 messages
2 total messages
Started by Michael Feinberg
Sat, 26 Nov 1994 12:40
Re: Student Question?
Author: Michael Feinberg
Date: Sat, 26 Nov 1994 12:40
Date: Sat, 26 Nov 1994 12:40
19 lines
1870 bytes
1870 bytes
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? >
Re: Student Question?
Author: Mark Aitchison, rm814,ext6947
Date: Tue, 29 Nov 1994 04:41
Date: Tue, 29 Nov 1994 04:41
20 lines
2178 bytes
2178 bytes
> 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? > I presume the airplane is totally enclosed so whatever lift the birds get is at the expense of downward air pressure, so the weight is the same. But if the truckload of birds is open to the outside some proportion (not 100% surely) of that downward force of air will be against the ground rather than the truck, so I'd say more than half of the birds would have to fly. --- ------------------------------------------------------------------------------- Mark Aitchison, Physics & Astronomy Phone : +64 3 3642-947 a.h. 3371-225 University of Canterbury, Fax : +64 3 3642-469 or 3642-999 Christchurch, New Zealand. E-mail: phys169@csc.canterbury.ac.nz -------------------------------------------------------------------------------
Thread Navigation
This is a paginated view of messages in the thread with full content displayed inline.
Messages are displayed in chronological order, with the original post highlighted in green.
Use pagination controls to navigate through all messages in large threads.
Back to All Threads