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AAW An acronym for anti-aircraft warfare. aback (of a sail) Filled by the wind on the opposite side to the one normally used to move the vessel forward.On a square-rigged ship, any of the square sails can be braced round to be aback, the purpose of which may be to reduce speed (such as when a ship-of-the-line is keeping station with others), to heave to, or to assist moving the ship's head ...
The first of Newton's laws of motion states that an object's inertia keeps it in motion; since the object in the air has a velocity, it will tend to keep moving in that direction. A varying angular speed for an object moving in a circular path can also be achieved if the rotating body does not have a homogeneous mass distribution. [2]
In order to keep the stone moving in a circular path, a centripetal force, in this case provided by the string, must be continuously applied to the stone. As soon as it is removed (for example if the string breaks) the stone moves in a straight line, as viewed from above.
However, the meaning of Kepler's term, which he derived from the Latin word for "idleness" or "laziness", was not quite the same as its modern interpretation. Kepler defined inertia only in terms of resistance to movement, once again based on the axiomatic assumption that rest was a natural state which did not need explanation.
Nomads keep moving for different reasons. Nomadic foragers move in search of game, edible plants, and water. Aboriginal Australians, Negritos of Southeast Asia, and San of Africa, for example, traditionally move from camp to camp to hunt and gather wild plants. Some tribes of the Americas followed this way of life.
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The conventional English translation first appeared in John Heywood's collection of Proverbs in 1546, crediting Erasmus. Brewer's Dictionary of Phrase and Fable also credits Erasmus, and relates it to other Latin proverbs, "Planta quae saepius transfertus non coalescit" or "Saepius plantata arbor fructum profert exiguum", which mean that a frequently replanted plant or tree yields less fruit ...
Wall Street kicked off the Santa Rally season on a positive note, with all major indices and sectors closing higher in a shortened session ahead of the Christmas holiday. The S&P 500 climbed 1% ...