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ok viperdout, i see what you mean, but i dont think you are saying it correctly. Are you sure it's centifugal force that moves the pully? centifugal force moves rotating objects away from the axis of rotation, you need something to move objects along the axis. see what i mean? maybe i just don't follow your explaination, but it seems you got your physic mixed up a bit...
good idea tho.
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