If the air in the truck is sealed then the lorry will always remain the same, but if can circulate with the outside world then the lorry weight will reduce by the wieght of the chickens
Feel free to be as pedantic about this as you want.
A friend wants to know
"If a lorry fully loaded with chickens weighs 5 tonnes. How much does it weigh if all the chickens start flying around in the back?"
The chickens are free and can fly as much as they want to. The lorry is hermetically sealed with sufficient oxygen so they don't die. Schrodinger is elsewhere at the time.
His basic question is that in order to fly there must be a downwards force and presumably this eventually acts on the floor, so the lorry still weighs the same. Apparently it's puzzled him for years.
Oh and feel free to change tonnes to Newtons.
If the air in the truck is sealed then the lorry will always remain the same, but if can circulate with the outside world then the lorry weight will reduce by the wieght of the chickens
The truck will remain 5 tonnes – chickens can't fly!
Let your mind go and your body will follow. – Steve Martin, LA Story
yes, there are quite a few "issues" with the original post - "hermetically sealed"
It has been 'tested' with pigeons
http://mythbustersresults.com/episode77
from the New Scientist
http://www.newscientist.com/blog/las...-of-fancy.html
Slightly different though when its birds that can actually fly, with room to do so in a truck they can actually breath in The first post is a logic puzzle not a serious science experiment. The new scientist question link you gave at least gives you the option of scientific testing. The answer is Yes, he would make it across. Simply because the bridge limit is 5000 kilograms and the total weight is 5050 kilograms , barely over it - limits are "safe limits" not realistic limits. i'm no engineer but even I recognise a safe limit is going to be far removed from a structural collapse limit
Is a pigeon driving the truck or is the driver not being taken in to consideration?
Sorry... I got here late.... just to recap.... are the chickens frozen?
Has anyone taking into consideration the fact that they lay eggs?
Surely the weight of the truck will depend on how many of the chickens still have the eggs inside when they fly, or if they leave them on the ground
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And what about the weight of pidegon poop?
Plus if the pidegons are flying, they are burning energy and will weigh less?
Do pidegons weigh more than pigeons ?
You are getting closer to the right answer, be it chickens trying to fly or pigeons flying, truck hermetically sealed or not.
Action creates heat, hot air expands. Even if the truck is hermetically sealed it will expand slightly with less dense air inside, so it will be lighter.
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