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Why are the spinning wheels on a bank vault door so big? Why couldn't a smaller wheel work, or a knob, or a handle? - Quora
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How does a gyroscope work and how does it keep spinning? - Quora
How can one learn the spin their own yarn? - Quora
How long will it be until, if you insult an AI computer, refuse to have anything to do with it, and insist on talking w/ a human being, the left will call
What are bearings and where are they used on a motorcycle? - Quora
Is the torque located on a spinning wheel the same on the rim and at the center simultaneously, or is it just one or the other? - Quora