Dear Nina,
My name is Vicentiu Petrache and I'm from Romania (Europe)
The experiment of bicycle wheel is very interesting but I would ask you
if somebody have tried to weigh the wheel before and along the
experiment because I think the wheel will get more light as long as
rotating!
I'm going to do this experiment using a project presented on the
attachement.
As you can see the experiments is consisting of:
-an about 1 kg metal flywheel fixed on a shaft
-this group is mounted on two bearings
-the shaft is rotated by an electrical engine (say one of a vacuum
cleaner)
to 20 000 revolutions/minute
-the two bearings together the flywheel and its shaft are suspended (say
from the ceiling) using two wires A and B.
-from wire A a scale is connected.
-after starting the engine (fixing by hand the group at starting point
in order to be stable) the shaft will be disconnected from the shaft
using the clutch engine being separated completely.
-the B wire will be cut off and the group will start to rotate around
the A wire.
-at this moment we read the weight on the scale
-after the reading we can wait for the goup to stop or to stop it in a
voluntary way and after all is quiet we can read again the scale.
-I would bet the the group is heavier when is quiet than in rotation.
What is your opinion?
As soon as I'll be able to have money to do this experiment I'll do it
but if there is someone to try this I would be gratefull to be
acknowledged.
Thank you very much for your kindness and I'm waiting for your answer..
my e-mail is: petrachevicentiu@romtelecom.ro
<mailto:petrachevicentiu@romtelecom.ro>
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