A seesaw (also known as a teeter-totter) is a long, narrow board supported by a single pivot point, most commonly located at the midpoint between both ends; as one end goes up, the other goes down. These are most commonly found at parks and school playgrounds.
Mechanically, a seesaw is a lever which consists of a beam and fulcrum with the effort and load on either sides. [1]
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, wood chips, or sand.
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] [4]
In 2019, a set of seesaws were installed spanning the US-Mexico border fence between El Paso and Ciudad Juárez. [5]
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.[ citation needed ]
The term may also be attributable to the repetitive motion of a saw. It may have its origins in a combination of "scie" – the French word for "saw" with the Anglo-Saxon term "saw". Thus "scie-saw" became "see-saw". Another possibility is the situation of the apparent appearance, disappearance, and re-emergence of the person, seated opposite one's position, as they, seemingly, "rise" and "fall", against a changing, oscillating background - therefore: "I see you", followed by, "I saw you".
In the northern inland and westernmost region of the United States, a seesaw is also called a "teeter-totter." According to linguist Peter Trudgill, the term originates from the Nordic language word tittermatorter. [6] 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.
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 term that spread down the coast and a separate, Scots-Irish development in Appalachia. 'Hickey-horse' in the coastal regions of North Carolina is consistent with other linguistic and ethnic variations." [7]
In the early 2000s, seesaws have been removed from many playgrounds in the United States, citing safety concerns. [8] However, some people have questioned whether or not the seesaws should have been removed, indicating the fun provided by seesaws may outweigh the safety risk posed using them. [9]
Swiss German is any of the Alemannic dialects spoken in the German-speaking part of Switzerland, and in some Alpine communities in Northern Italy bordering Switzerland. Occasionally, the Alemannic dialects spoken in other countries are grouped together with Swiss German as well, especially the dialects of Liechtenstein and Austrian Vorarlberg, which are closely associated to Switzerland's.
A circular saw or a buzz saw, is a power-saw using a toothed or abrasive disc or blade to cut different materials using a rotary motion spinning around an arbor. A hole saw and ring saw also use a rotary motion but are different from a circular saw. Circular saws may also be loosely used for the blade itself. Circular saws were invented in the late 18th century and were in common use in sawmills in the United States by the middle of the 19th century.
In linguistics, reduplication is a morphological process in which the root or stem of a word or even the whole word is repeated exactly or with a slight change.
In grammar, a frequentative form of a word is one that indicates repeated action but is not to be confused with iterative aspect. The frequentative form can be considered a separate but not completely independent word called a frequentative. The frequentative is no longer productive in English, unlike in some language groups, such as Finno-Ugric, Balto-Slavic, and Turkic.
A jungle gym is a piece of playground equipment made of many pieces of material, such as metal pipes or ropes, on which participants can climb, hang, sit, and—in some configurations—slide. Monkey bars are a part of a jungle gym where a user, hanging in the air, swings between evenly spaced horizontal bars. In Australian English, the term "monkey bars" is sometimes used to refer to the entire jungle gym.
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Kapingamarangi is a Polynesian language spoken in the Federated States of Micronesia. It had 3,000 native speakers in 1995. The language is closely related to the Nukuoro language.
After about 1910, the Baker valve gear was the main competitor to Walschaerts valve gear for steam locomotives in the United States. Strictly speaking it was not a valve gear but a variable expansion mechanism adapted to the Walschaerts layout replacing the expansion link and sliding die block. The Baker arrangement used more pivot bearings or pin joints, but avoided the die slip inherent to the expansion link, with the aim of lessening wear and the need for service; it could also facilitate longer valve travel.
Eastern Pomo, also known as Clear Lake Pomo, is a nearly extinct Pomoan language spoken around Clear Lake in Lake County, California by one of the Pomo peoples.
Ship motions are defined by the six degrees of freedom that a ship, boat, or other watercraft, or indeed any conveyance, can experience.
Woleaian is the main language of the island of Woleai and surrounding smaller islands in the state of Yap of the Federated States of Micronesia. Woleaian is a Chuukic language. Within that family, its closest relative is Satawalese, with which it is largely mutually intelligible. Woleaian is spoken by approximately 1700 people. Woleai has a writing system of its own, a syllabary based on the Latin alphabet.
The grammar of American Sign Language (ASL) has rules just like any other sign language or spoken language. ASL grammar studies date back to William Stokoe in the 1960s. This sign language consists of parameters that determine many other grammar rules. Typical word structure in ASL conforms to the SVO/OSV and topic-comment form, supplemented by a noun-adjective order and time-sequenced ordering of clauses. ASL has large CP and DP syntax systems, and also doesn't contain many conjunctions like some other languages do.
Dog agility is a dog sport in which a handler directs a dog through an obstacle course in a race for both time and accuracy. Dogs run off leash with no food or toys as incentives, and the handler can touch neither dog nor obstacles. The handler's controls are limited to voice, movement, and various body signals, requiring exceptional training of the animal and coordination of the handler.
Miracle Recreation Equipment Company is a playground manufacturer in the United States, providing children's playground equipment and amenities for parks and schools, throughout the world.
Buddy's Circus is a 1934 Warner Bros. Looney Tunes cartoon, directed by Jack King. The short was released on November 8, 1934, and stars Buddy, the second star of the series.
Malay grammar is the body of rules that describe the structure of expressions in the Malay language and Indonesian. This includes the structure of words, phrases, clauses and sentences. In Malay and Indonesian, there are four basic parts of speech: nouns, verbs, adjectives, and grammatical function words (particles). Nouns and verbs may be basic roots, but frequently they are derived from other words by means of prefixes and suffixes.
A Russian swing is a large, floor-mounted swing which is sometimes used in circus performances to make impressive high acrobatic jumps.
A playground, playpark, or play area is a place designed to provide an environment for children that facilitates play, typically outdoors. While a playground is usually designed for children, some are designed for other age groups, or people with disabilities. A playground might exclude children below a certain age.
The Buckeye School, in Larimer County, Colorado near Wellington, Colorado, now known as the Buckeye Community Center, was a rural two-room schoolhouse built in 1925. It was used as a school until 1960. It was listed on the National Register of Historic Places in 2008.
Media related to Seesaws at Wikimedia Commons
The dictionary definition of teeter-totter at Wiktionary| Authority control databases: National |
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