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-   -   And another... (http://forums.sv650.org/showthread.php?t=84341)

Baph 21-02-07 10:39 AM
And another...
 
A large truck is crossing a bridge 1 mile long. The bridge can only hold 14000 lbs, which is the exact weight of the truck. The truck makes it half way across the bridge and stops. A bird lands on the truck. Does the bridge collapse? Give a reason.

OK, I'll stop after this one :D

Filipe M. 21-02-07 10:45 AM
Re: And another...
 
Will the bird take off when it senses the bridge going kaput?

Sudoxe 21-02-07 10:56 AM
Re: And another...
 
Quote:
Originally Posted by Baph (Post 1121889)
A large truck is crossing a bridge 1 mile long. The bridge can only hold 14000 lbs, which is the exact weight of the truck. The truck makes it half way across the bridge and stops. A bird lands on the truck. Does the bridge collapse? Give a reason.

OK, I'll stop after this one :D
No, the H&S people would of put signs saying it can only hold 14000lbs. When infact it can hold 24000lbs.

Stingo 21-02-07 11:21 AM
Re: And another...
 
yes it will collapse - because...


14000lbs + weight of bird is greater than supposed breaking strain. It's a bit like have a lorry that weighs 14000lbs and then filling up its trailer with 'stuff' - the two combined become the total overall weight. I reckon. Does it have a plimsol line?!?! :D

Sudoxe 21-02-07 11:23 AM
Re: And another...
 
No one has mentioned either that the truck weights 14000lbs nothing about the driver or its load.

Dan

Baph 21-02-07 11:45 AM
Re: And another...
 
Quote:
Originally Posted by Stingo (Post 1121931)
yes it will collapse - because...


14000lbs + weight of bird is greater than supposed breaking strain. It's a bit like have a lorry that weighs 14000lbs and then filling up its trailer with 'stuff' - the two combined become the total overall weight. I reckon. Does it have a plimsol line?!?! :D
Nice thinking, but wrong.
Quote:
Originally Posted by Sudoxe (Post 1121935)
No one has mentioned either that the truck weights 14000lbs nothing about the driver or its load.

Dan
It's assumed that the entire truck, including the driver etc weighs 14000lbs. Now get on with the answer (and reason) :D

Baph 21-02-07 11:46 AM
Re: And another...
 
Quote:
Originally Posted by Filipe M. (Post 1121897)
Will the bird take off when it senses the bridge going kaput?
Wouldn't that cause a slight downdraft on the truck as the bird took off? :D

Filipe M. 21-02-07 11:47 AM
Re: And another...
 
Quote:
Originally Posted by Baph (Post 1121962)
Wouldn't that cause a slight downdraft on the truck as the bird took off? :D
It depends if said bird is VTOL, HTOL, and the length of the treadmill. Oh, and friction! :lol:

Kinvig 21-02-07 11:50 AM
Re: And another...
 
Depends on the weight of the bird & the amount of fuel consumed to get the lorry half way across.

I would guess that normal lorry & sparrow/pidgeon (not a vulture with a horses carcass in its mouth!!!) then:

It won't collapse!

Nutkins 21-02-07 11:52 AM
Re: And another...
 
Is 14000lbs the ultimate weight the bridge can hold, or the safe weight it can hold?

If it's the ultimate weight then chances are the resulting displacement from the dymanics imposed by the truck driving onto the bridge would've outshone the dicky-bird taking a pew.

How big is the bird? Is it possible, the said beasty could've flown off with the truck?


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