Torque Torque Torque, moment, or moment of force is the rotational equivalent of linear force. The concept originated with the studies of Archimedes on the usage of levers. Just as a linear force is a push or a pull, a torque can be thought of as a twist to an object. The symbol for torque is typically formula_1, the lowercase Greek letter "tau". When being referred to as moment of force, it is commonly denoted by "M". In three dimensions, the torque is a pseudovector; for point particles, it is given by the cross product of the position vector (distance vector)
Greek alphabet the abjads used in Semitic languages, which have letters only for consonants. Greek initially took over all of the 22 letters of Phoenician. Five were reassigned to denote vowel sounds: the glide consonants ("yodh") and ("waw") were used for [i] (Ι, "iota") and [u] (Υ, "upsilon") respectively; the glottal stop consonant ("|aleph") was used for [a] (Α, "alpha"); the pharyngeal ("ʿayin") was turned into [o] (Ο, "omicron"); and the letter for ("he") was turned into [e] (Ε, "epsilon"). A doublet of waw was also borrowed as a consonant for [w] (Ϝ, digamma). In addition, the Phoenician letter for the emphatic