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ANSWERS: 3
  • BeccaBaby
    I really haven't the foggiest what the different is, but I'm suddenly in the mood to watch The Jetsons. ;) LOL!
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  • xprofessor
    They are all toothed wheels. Gears are designed to mesh with other gears, and the geometry of the teeth is optimized for this purpose. Sprockets are designed to drive, or be driven by, a chain (such as in a bicycle) so its teeth are shaped for that purpose (pointier than gear teeth). A cog -- or more properly, a cogwheel -- as I understand the term, has squared-off teeth designed for a different kind of mechanism.
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  • Krumple
    a cog is a tooth on a gear. A gear meshes with other gears within the mechanism. A sprocket meshes with a chain rather than another gear or sprocket. In a similar vein, a pulley meshes with a rope or belt.
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