Quotation from: General Science

Written by: Bertha M. Clark


159. The Screw. Another valuable and indispensable form of the
inclined plane is the screw. This consists of a metal rod around which
passes a ridge, and Figure 108 shows clearly that a screw is simply a
rod around which (in effect) an inclined plane has been wrapped.


[Illustration: FIG. 108--A screw as a simple machine.]


The ridge encircling the screw is called the thread, and the distance
between two successive threads is called the pitch. It is easy to see
that the closer the threads and the smaller the pitch, the greater the
advantage of the screw, and hence the less force needed in overcoming
resistance. A corkscrew is a familiar illustration of the screw.

PREVIOUS GROUP HOME SITE HOME NEXT
Part of the RabbitHoleResearch Project
Change Tag: ~~ 0 ~~