In addition to the three fundamental quantities, classical mechanics also deals with derived quantities, such as velocity, acceleration, momentum, angular momentum, etc. Each of these derived quantities can be reduced to some particular combination of length, mass, and time. The mks units of these derived quantities are, therefore, the corresponding combinations of the mks units of length, mass, and time. For instance, a velocity can be reduced to a length divided by a time. Hence, the mks units of velocity are meters per second:
Here, v stands for a velocity, L for a length, and T for a time, whereas the operator[….] represents the units, or dimensions, of the quantity contained within the brackets. Momentum can be reduced to a mass times a velocity. Hence, the mks units of momentum are kilogram-meters per second:
[p] = [M][v] =[M][L]/[T] = kgms-1
Here, p stands for a momentum, and M for a mass. In this manner, the mks units
of all derived quantities appearing in classical dynamics can easily be obtained.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .