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Amobile (UK:/ˈmoʊbaɪl/,[1]US:/ˈmoʊbiːl/)[2] is a type ofkinetic sculpture constructed to take advantage of the principle ofequilibrium. It consists of a number of rods, from which weighted objects or further rods hang. The objects hanging from the rods balance each other, so that the rods remain more or less horizontal. Each rod hangs from only one string, which gives it the freedom to rotate about the string. An ensemble of these balanced parts hang freely in space, by design without coming into contact with each other.
Mobiles are popular in thenursery, where they hang over cribs to giveinfants entertainment and visualstimulation. Mobiles have inspired manycomposers, includingMorton Feldman andEarle Brown who were inspired byAlexander Calder's mobiles to create mobile-likeindeterminate pieces.[3]John Cage wrote the music for the short film Works of Calder that focused on Calder's mobiles.Frank Zappa stated that his compositions employ a principle of balance similar to Calder mobiles.[4]
The meaning of the term "mobile" as applied to sculpture has evolved since it was first suggested byMarcel Duchamp in 1931 to describe the early, mechanized creations ofAlexander Calder.[5] At this point, "mobile" was synonymous with the term "kinetic art", describing sculptural works in which motion is a defining property. While motor- or crank-driven moving sculptures may have initially prompted it, the word "mobile" later came to refer more specifically to Calder's free-moving creations. Calder in many respects invented an art form where objects (typically brightly coloured,abstract shapes fashioned from sheet metal) are connected by wire, much like abalance scale. By the sequential attachment of additional objects, the final creation consists of many balanced parts joined by lengths of wire whose individual elements are capable of moving independently or as a whole when prompted by air movement or direct contact. Thus, "mobile" has become a more well-defined term with its origin in the many such hanging constructs Calder produced in a prolific manner between the 1930s and his death in 1976.
Calder's work is the only one defined by the term "mobile"; however, three other notable artists worked on a similar concept.Man Ray experimented with this idea around 1920,Armando Reverón who during the 30s made a series of movable skeletons andBruno Munari created his "Useless Machines" in 1933, made in cardboard and playful colors.[6] AlsoJulio Le Parc, Grand Prize winner at the Venice Biennale in 1966.
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