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Suddenly, the birds start flying around inside the lorry. How will the reading on the scales change, if at all?
They're penguins and can't actually fly!
I already said that.
Something to do with displacement and possibly lasers?
and suddenly more birds start flying than before, then yes the reading on the scales will change.
They'd all be dead :'(
(And all the birds have little oxygen packs on.) WHAT IF?
Sorry, I'll leave this thread for the clever ones now.
I just had so much fun watching everyone else fighting in the aeroplane thread.
my answer below is completely correct, there is no discussion to be had as far as I can see, however I will be delighted if someone could make me eat my words.
I am quite confident.
I cannot detect any 'ZapstaInconsistancy' in the initial post in this thread
because some birds often push down with their legs to give themselves a boost to flight.
If they all did this simultaneously and there were lots of heavy birds then initially the scales reading would go up, however once their leg muscles have stopped accelerating their body mass upwards then the scale reading would drop again.
if they were all then flying inside the lorry then the air thrust downwards to kep them aloft would not all be pressed down onto the lorry as it is not airtight so some of this thrust will (net) be going out of the sides of the lorry and therefore overall the lorry will become lighter