Screw

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The screw is a simple machine often used in conjunction with a screwdriver to bore into a piece of wood. A screw's mechanical advantage is equal to the circumference of the screwdriver handle divided by the screw's pitch, the distance from one thread to the next.[1]

A screw is a practical application of the inclined plane.

References

  1. http://www.cosi.org/files/Flash/simpMach/sm1.swf
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