The screw
A screw is one of six simple machines, the first and most basic machines to be invented. A screw is simply a inclined plane wrapped around a cylinder. Spiral staircases, jars, and double swivel stools are three of many modern day examples of the screw. The spiraling inclined plane that sticks out from the body of the screw forms the threads of the screw. The screw makes work easier because it increases the distance needed and decreases the force needed.
The invention ANd History of the screw
Archytas a Pythagorean philosopher is an alleged inventor of the screw, but the actual date of its first use as a useful machine is unknown. The Ancient Egyptians used a techinique that involved an inclined plane wrapped around a pyramid to build them, thus this is an ancient example of a screw. There is also the inventor of the Archimedes screw, which id without a doubt Archimedes however, there is evidence of a machine like it used for irrigation in Egypt earlier in history. Around the first century screw shaped tools became common. Early screws were made from wood and were used in wire presses, olive oil presses, and pressing clothes. Metal screws and nuts used to fasten two objects together first appeared in the fifteenth century.
This an image of an Ancient Egyptian example of a screw in Ancient Egypt, while Pyramids were being built. This helped the pyramids to be built faster and faster, with tricks and short-cuts improvmentd in the timing were made
This is the Archimedes Screw, invented by Archimedes a mathematician. The Archimedes screw was used to gather water, instead of having to manually gather water. Archimedes first invested this screw around the 3rd century BC.
Creators of this page: Josiah C., Dwight B., Elizabeth F.
SoURces
http://www.uark.edu/depts/aeedhp/agscience/simpmach.htm
http://www.britannica.com/
http://www.livescience.com/49106-simple-machines.html
www.merriam-webster.com/dictionary/screw
McDougal Littell Science: Motion and Forces by McDougal Littell
scienceforkids.kidipede.com › Physics › Simple Machines
http://www.britannica.com/
http://www.livescience.com/49106-simple-machines.html
www.merriam-webster.com/dictionary/screw
McDougal Littell Science: Motion and Forces by McDougal Littell
scienceforkids.kidipede.com › Physics › Simple Machines