| 1. | In a frictionless universe, nearly everyone would be irascible.
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| 2. | Of course, this rule is only ironclad in purely frictionless environments.
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| 3. | The gyros, accelerometers and pendulums contain almost frictionless nitrogen gas bearings.
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| 4. | :A string in a frictionless environment would continue to vibrate forever.
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| 5. | Cartilage is the connective tissue responsible for frictionless joint movement.
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| 6. | The same is true of perfectly elastic billiard balls on a frictionless surface.
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| 7. | Frictionless also grew from Professor Maes'work at the MIT Media Laboratory.
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| 8. | And Rowling's universe seemed a frictionless place.
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| 9. | Imagine a train that travels through a frictionless railway line along the equator.
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| 10. | Frictionless planes do not exist in the real world.
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