Significations et usages de seesaw

  A set of playground seesaws.

A see saw (also known as a teeter-totter or teeter board) is a long, narrow board pivoted in the middle so that, as one end goes up, the other goes down.

  Mechanics

Mechanically a seesaw is a lever and fulcrum.^[1]

Seesaws also work as a simple example of a mechanical system with two equilibrium positions. One side is stable, while the other is unstable.^[1]

The simple mechanics of seesaws make them appear frequently in school exam paper questions on mechanical problems.^{[citation needed]}

  Varieties

  Seesaws are manufactured in creative shapes and designs

The most common playground design of seesaw features a board balanced in the center. A person sits on each end, and they take turns pushing their feet against the ground to lift their side into the air. Playground seesaws usually have handles for the riders to grip as they sit facing each other. One problem with the seesaw's design is that if a child allows himself/herself to hit the ground suddenly after jumping, or exits the seesaw at the bottom, the other child may fall and be injured. For this reason, seesaws are often mounted above a soft surface such as foam or wood chips.

  A seesaw or teeter-totter in a children's playground in Ottawa, Canada, 2010

Seesaws also are manufactured in shapes designed to look like other things, such as airplanes, helicopters,^[2] and animals.

Seesaws, and the eagerness of children to play with them, are sometimes used to aid in mechanical processes. For example, at the Gaviotas community in Colombia, a children's seesaw is connected to a water pump.^[3]

  Name origin and variations

  Girl hanging from a seesaw.

Seesaws go by several different names around the world. Seesaw, or its variant see-saw, is a direct Anglicisation of the French ci-ça, meaning literally, this-that, seemingly attributable to the back-and-forth motion for which a seesaw is known.

In most of the United States, a seesaw is also called a "teeter-totter". According to linguist Peter Trudgill, the term originates from the Norfolk language word tittermatorter.^[4] A "teeter-totter" may also refer to a two-person swing on a swing seat, on which two children sit facing each other and the teeter-totter swings back and forth in a pendulum motion.

Both teeter-totter (from teeter, as in to teeter on the edge) and seesaw (from the verb saw) demonstrate the linguistic process called reduplication, where a word or syllable is doubled, often with a different vowel. Reduplication is typical of words that indicate repeated activity, such as riding up and down on a seesaw.

In the southeastern New England region of the United States, it is sometimes referred to as a tilt or a tilting board.

  Makeshift seesaws are used for acrobatics.

Speakers in northeastern Massachusetts, United States, sometimes call them teedle boards. In the Narragansett Bay area the term changes to dandle or dandle board.

According to Michael Drout, "There are almost no "Teeter-" forms in Pennsylvania, and if you go to western West Virginia and down into western North Carolina there is a band of "Ridey-Horse" that heads almost straight south. This pattern suggests a New England origin or importation of the term that spread down the coast and a separate development in Appalachia, where Scotts-Irish settlers did not come from New England. "Hickey-horse" in the coastal regions of North Carolina is consistent with other linguistic and ethnic variations.^[5]

In Korea, the seesaw is known as a Neol (널) and is used for Neolttwigi (널뛰기) by women and girls.

  References

1. ^ ^{a b} Benedek, George Bernard (2000). Physics, with Illustrative Examples from Medicine and Biology: Mechanics. New York: Springer. pp. 379. ISBN 978-0-387-98769-9. 
2. ^ Lifetime Playground, playsets and play equipment: Teeter-Totters
3. ^ [1],[2]
4. ^ teeter-totter listing in TheFreeDictionary.com
5. ^ Drout, Michael D.C. (2006). A History of the English Language (Course Guide). Recorded Books, LLC. p. 98. ISBN 978-1-4281-1730-3. http://www.recordedbooks.com/courses_pdf/UT088.pdf. Retrieved 2010-04-12.