AY Honors/Ultimate Disc/Answer Key

2005-12-23T10:21:46Z

222.154.103.123: /* Physics */

[[Image:frisbee-1.jpg|thumb|200px|right|A [[Wham-O]] Professional Frisbee]]

While the word '''Frisbee''' is a registered [[trademark]] of the [[Wham-O]] toy company, the term is often used [[genericized trademark|generically]] to describe '''flying discs''' similar to those made by the company. They are generally [[plastic]], roughly 8 to 10 inches (20-25 cm) in [[diameter]], with a lip. They are designed to fly [[aerodynamic]]ally when thrown with [[rotation]] and can be caught by hand.

A wide range of frisbee variants are available commercially. [[Disc golf]] discs are usually smaller but denser and are tailored for particular flight profiles such as stability or distance. When it was discovered that [[dog]]s enjoyed chasing and retrieving the slow-moving discs, special frisbees were designed with more pliable material that would better resist the dog bites. [[Disc dog]] competitions, in which dogs' frisbee-catching skills are judged, have become quite popular as well. Frisbee-like discs shaped like a [[Saturn (planet)|Saturn]]'s ring, known as [[aerobie]]s, typically fly significantly farther than traditional frisbees.

==History==

The modern day frisbees are developed from the "Flying-Saucer", originally invented by [[Walter Frederick Morrison]] and codeveloped and financed by [[Warren Franscioni]] in [[1948]]. However, the initial prototype was unsuccessful. A later model made by Morrison in [[1955]] and sold as the "Pluto Platter" was bought by Wham-O in [[1957]]. The first flying discs rolled into production on [[January 13]], [[1957]]. In the next year, Wham-O renamed the toy "Frisbee", a (probably deliberate) misspelling of the name of the [[Frisbie Pie Company]] of [[Bridgeport, Connecticut]], whose [[pie]] tins had been used by [[Yale University]] students in the campus for similar purposes.

==Games using frisbee==

* [[Ultimate (sport)|Ultimate]]
* [[Freestyle frisbee]]
* [[Guts frisbee]]
* [[Disc golf]]
* [[Durango Boot]]
* [[DDC Frisbee]]
* [[Flutterguts]]
* [[Friskee]]
* [[Disc dog|Frisbee dogs]]
* [[Dodge Frisbee]]
* [[Goaltimate]]
* [[Schtick (Disc Game)|Schtick]]
* [[Flutter Frisbee]]

==Physics==

The frisbee's rotation creates an [[angular momentum]] perpendicular to the horizontal plane, stabilizing the disc's altitude in high-speed flight. Small ridges near the leading edge act as turbulators, reducing flow separation by forcing the airflow to become [[turbulent]] after it passes over the ridges. [[Lift (force)|Lift]] is generated in primarily the same way as a traditional asymmetric [[airfoil]], that is, by accelerating upper airflow such that a pressure difference gives rise to a lifting force.

[[Richard Feynman]] in his book ''[[Surely You're Joking, Mr. Feynman!]]'' suggests that watching the wobble of a plate tossed in the [[MIT]] cafeteria stimulated him to develop mathematics that eventually led to his [[qed|nobel prize winning work]][http://www.washingtonpost.com/wp-dyn/content/article/2005/11/03/AR2005110301924.html].

==See also==

*FRISBEE COLLECTIVE [http://www.frisbeecollective.com frisbeecollective.com] This site celebrates the plastic disc, elevating it into an object of art that should be appreciated for its staying power and range of imagery... over 150 discs on display
*Descriptions of [[Frisbee throws]]
*[[George Carlin#Frisbeetarianism|Frisbeetarianism]]
*In the animated motion picture [[The Secret of NIMH]], the main character's name was changed in post-production from "Frisby" to "Brisby" to avoid potential trademark infringements.

==Further reading==

*''Frisbee, A Practitioner's Manual and Definitive Treatise'' Stancil E.D. Johnson, M.D. Workman Publishing Company, New York (July, 1975) ISBN 0-911104-53-4
*''The Official Frisbee Handbook'' Goldy Norton, Bantam Books, Toronto/New York/London (July, 1972) no ISBN number
*''Frisbee Players' Handbook'' Mark Danna, Dan Poynter, Parachuting Publications, Santa Barbara, California (1978) ISBN 0-015516-19-5
*''Frisbee Sports & Games'' Charles Tips, Dan Roddick, Celestial Arts, Millbrae, California (March 1979) ISBN 0-89087-233-3
*''Frisbee by the Masters'' Charles Tips, Celestial Arts, Millbrae, California (March 1977) ISBN 0-89087-142-6

==External links==

*[http://inventors.about.com/library/weekly/aa980218.htm Frisbee, about.com]
*[http://www.frisbeedisc.com/ Wham-O Frisbee disc website]
*[http://www.ukultimate.com/ UK Ultimate Association]
*[http://www.lookfly.com/ Lookfly: for frisbee equipment]

[[Category:Frisbee]]
[[Category:National Toy Hall of Fame]]
[[Category: Toys]]
[[Category:Yale University]]

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AY Honors/Ultimate Disc/Answer Key