Urgent - puzzle needs solving!
- Thread starter Sherm
- Start date
Nothing mentions how far away the villagers are, maybe he has time to go and put a coin on the other side (short bridge?) then come back for the other 2?
And for above, its the old "will a plane take off on a treadmill?", answer: yes.
And for above, its the old "will a plane take off on a treadmill?", answer: yes.
Plane on treadmill one - what's the hidden catch? If the plane is stationary relative to the air around it then it won't gain any lift.
EDIT: Read a few threads about it on other forums, those arguing "Yes" seem to say it's because the engines are powering the aircraft and the treadmill is just turning the wheels, which is perfectly true, but if the aircraft is remaining stationary relative to the air take off as there will still be no lift being created by the wings.
EDIT: Read a few threads about it on other forums, those arguing "Yes" seem to say it's because the engines are powering the aircraft and the treadmill is just turning the wheels, which is perfectly true, but if the aircraft is remaining stationary relative to the air take off as there will still be no lift being created by the wings.
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Associate
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He doesn't take the bridge, he swims 
Associate
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Couldn't he fly?
He is a bird, I presume.
Angus Higgins
He is a bird, I presume.
Angus Higgins
Zogger said:
There will be friction between the treadmill and the wheels, so if the treadmill is travelling at the same speed as the wheels then it is stationary. If the plane is moving forwards while the wheels are in full contact with the treadmill then the wheels are travelling faster than the treadmill.
Zogger said:afaik the friction is nothing compared to the forward force of the engines which does not involve the ground or the wheels.
only way is to do the experiment really
If the plane is not stationary then the wheels are not moving at the same speed as the treadmill, which voids the puzzle.