And another...

Of course, if it's 140000 lbs with safety factors built in, then the little birdy can jump up and down on the vehicle .... and so can the rest of his flock (within reason).

i reckon it collapses when he reaches the middle dunno why i just reckon that is the answer

In order to maintain air-speed velocity, a swallow needs to beat its wings forty-three times every second

Originally Posted by Kinvig

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!

Thread closed, we have a wiener! Opps! Winner

So you're saying that as long as the weight of the fuel used exceeds the weight of the bird then no there will be no collapse.

But this flies in the face of the assumption, which is a known known. It's silly to have known or unknown unknowns, and we would not have considered the weight of the fuel used as an unknown known because it was set out as part of a known known. The weight of the bird is an unknown known, so how the hell are we supposed to know the answer to the quezzie?

Originally Posted by Ed

So you're saying that as long as the weight of the fuel used exceeds the weight of the bird then no there will be no collapse.

But this flies in the face of the assumption, which is a known known. It's silly to have known or unknown unknowns, and we would not have considered the weight of the fuel used as an unknown known because it was set out as part of a known known. The weight of the bird is an unknown known, so how the hell are we supposed to know the answer to the quezzie?

Is that another puzzle?

It's called assumptions.

If the fuel used, weighs the same as the bird (plus any draft's caused by langing/take-off/flatulence), then the bridge survives.

If not, bye bye bridge.

How long is the lorry? If it's over a mile long it doesn't matter.

[Stingo]

Originally Posted by Ed

So you're saying that as long as the weight of the fuel used exceeds the weight of the bird then no there will be no collapse.

But this flies in the face of the assumption, which is a known known. It's silly to have known or unknown unknowns, and we would not have considered the weight of the fuel used as an unknown known because it was set out as part of a known known. The weight of the bird is an unknown known, so how the hell are we supposed to know the answer to the quezzie?

yeah!! What he said!! *Brandishes cutlass*!!

Originally Posted by hovi5

In order to maintain air-speed velocity, a swallow needs to beat its wings forty-three times every second

Depends if its an african or european swallow...