Quote:
Originally posted by bdjuf
and the ONLY way to make it past the bridge
is if you make the birds do FREE FALL while your passing the bridge
that is the only way that they will not be exerting a force on the truck floor
as I said, its theoretical, not practical, so it would be almost impossible to do this in real life, unless your car goes EXTREMELY fast and the bridge is EXTREMELY short
but the theory is there
once again, if the birds do free-fall, there is no force on the floor, so its an easy 900kg passing the bridge of 1000kg capacity
thank you all for playing 
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You've overlooked one thing- in free fall, the birds would be falling straight down but the truck is moving forward across the bridge. And, as soon as the back of the truck hits the birds, their weight gets added if they're going to cross that bridge.
Closed systems are what closed systems do. Nice try though, bdjuf, you had a couple of 'em going there...
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