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Linya 3: Ginagamit ang klasikong mekaniks para sa paglalarawan ng galaw o kilos ng mga bagay na [[makroskopiko]], mula sa mga [[prohektil]] hanggang sa mga bahagi ng [[makinarya]], pati na mga [[bagay na astronomikal]], katulad ng [[sasakyang pangkalawakan]], mga [[planeta]], mga [[bituin]], at mga [[galaksiya]]. Gumagawa ito ng napakatumpak na mga resulta sa loob ng mga dominyo o nasasakupang ito, at isa sa pinakamatanda at pinakamalaking mga paksa sa [[agham]], [[inhinyeriya]], at [[teknolohiya]]. Bukod pa rito, maraming mga kaugnay na mga espesyalidad ang umiiral na nakatuon sa mga [[gas]], mga [[likido]], at mga [[solido]], at iba pa. Bilang karagdagan, pinaiinam ang klasikal na mekaniks ng [[natatanging relatibidad]] para sa mga bagay na may matataas na [[belosidad]] na umaabot na sa [[tulin ng liwanag]]. Ginagamit ang [[heneral na relatibidad]] o [[pangkalahatang relatibidad]] upang mapanghawakan ang [[grabitasyon]] sa mas malalim na antas, at bilang panghuli, pinanghahawakan ng [[kuwantum mekaniks]] ang [[duwalidad ng alon-partikulo]] ([[kadalawahan ng alon-partikulo\|kadalawahan]] o pagiging dalawa ng alon-partikulo) ng mga [[atomo]] at mga [[molekula]]. Ang termino o katawagang ''klasikong mekaniks'' ay naimbento noong kaagahan ng ika-20 daantaon upang ilarawan ang sistema ng [[pisikang matematiko]] o [[pisikang matematikal]] na sinimulan ni [[Isaac Newton]] at maraming mga [[pilosopong natural]] noong kontemporaryong ika-17 daantaon, na nagtatatag mula sa mas maaaga pang mga teoriyang astronomikal ni [[Johannes Kepler]], na ibinatay naman sa tumpak na mga pagmamasid o mga obserbasyon ni [[Tycho Brahe]] at mga pag-aaral ng terestriyal na [[mosyong pamprohektil]] ni [[Galileo Galilei]], subalit bago sumpamit ang pag-unlad ng [[pisikang kuwantum]] at [[relatibidad]]. Kung gayon, ilan sa mga pinagmulan o pinagkunan ang hindi nagsasama ng [[mekaniks ni Einstein]] ([[teoriya ng relatibidad]]), na sa kanilang pananaw ay kumakatawan sa ''klasikong mekaniks'' sa pinakamaunlad at pinakatumpak nitong anyo. <!------▼ The term ''classical mechanics'' was coined in the early 20th century to describe the system of mathematical physics begun by [[Isaac Newton]] and many contemporary 17th century [[natural philosophers]], building upon the earlier astronomical theories of [[Johannes Kepler]], which in turn were based on the precise observations of [[Tycho Brahe]] and the studies of terrestrial [[projectile motion]] of [[Galileo Galilei\|Galileo]], but before the development of quantum physics and relativity. Therefore, some sources exclude so-called "[[Theory of relativity\|relativistic physics]]" from that category. However, a number of modern sources ''do'' include [[Theory of relativity\|Einstein's mechanics]], which in their view represents ''classical mechanics'' in its most developed and most accurate form <ref group=note>The notion of "classical" may be somewhat confusing, insofar as this term usually refers to the era of [[classical antiquity]] in [[European history]]. While many discoveries within the [[mathematics]] of that period remain in full force today, and of the greatest use, the same cannot be said about its "science". This in no way belittles the many important developments, especially within technology, which took place in antiquity and during the [[Middle Ages]] in Europe and elsewhere. ▲<!------ However, the emergence of classical mechanics was a decisive stage in the development of [[science]], in the modern sense of the term. What characterizes it, above all, is its insistence on [[mathematics]] (rather than [[speculation]]), and its reliance on [[experiment]] (rather than [[observation]]). With classical mechanics it was established how to formulate [[quantitative]] predictions in [[theory]], and how to test them by carefully designed [[measurement]]. The emerging globally cooperative endeavor increasingly provided for much closer scrutiny and testing, both of theory and experiment. This was, and remains, a key factor in establishing certain knowledge, and in bringing it to the service of society. History shows how closely the health and wealth of a society depends on nurturing this investigative and critical approach.</ref> ----> <!--This view seems to be very useful as an aside note, as in "for futher information". --> ~~<!----~~ The initial stage in the development of classical mechanics is often referred to as [[Newtonian mechanics]], and is associated with the physical concepts employed by and the mathematical methods invented by [[Isaac Newton\|Newton]] himself, in parallel with [[Gottfried Wilhelm von Leibniz\|Leibniz]], and others. This is further described in the following sections. More abstract and general methods include [[Lagrangian mechanics]] and [[Hamiltonian mechanics]]. Much of the content of classical mechanics was created in the 18th and 19th centuries and extends considerably beyond (particularly in its use of analytical mathematics) the work of [[Isaac Newton\|Newton]].

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