理論力學(xué)課件：Summary

1、1CLASSICAL MECHANICS - summary vs. prefaceOutline1.What is CLASSICAL MECHANICS 2.Why CLASSICAL MECHANICS 3.How does it work4.Goal of this term2經(jīng)典力學(xué)、古典力學(xué)、理論力學(xué)、分析力學(xué)1.an equivalent method to describe Newton mechanics. 描述牛頓力學(xué)的另外一種方式 牛頓力學(xué)： 單質(zhì)點(diǎn)(F=ma 描述簡單)、 多質(zhì)點(diǎn)/質(zhì)點(diǎn)組的時(shí)候 (復(fù)雜 單純的F=ma 過于復(fù)雜 比如對剛體)1.What is CLASS

2、ICAL MECHANICS362: a general (elemental) frame to describe elemental physics. Not only for Newton mechanics, But also for any elemental physics! ex: Newton equation、 Maxwell equations、 general relativity、 strong /weak interaction in classical level. 1.What is CLASSICAL MECHANICSAs claimed above 1：An

3、other equivalent method to describe Newton mechanics. Why another method? - more powerful begin from trivial equivalence in some part, but get new results when extend it.*2： “A general (basic) frame to describe physics” unify the theoriesonetwothree2.Why CLASSICAL MECHANICS 5A. Newton Mechanics: dir

4、ectly write down the dynamic equation Fi=miaB. The main idea/frame of classical mechanics ：(1) write down an elemental quantity which is function of state quantites and time.(2) get the dynamical equations from it.(3) to get the finial theory, do quantization quantum mechanics、QED、QCD etc。） Physics:

5、 to find out the elemental quantities of the nature and their relations3.How does it work6From the main idea, four problem,1. find out/write down the quantities xs to describe the state.2: find out/write down the elemental quantity(L) whichis function of xs and t.3: get the equations from the elemen

6、tal quantity?4: how to do quantization? (solved partly)this term 1/2/3 for some Newton system and some applications etc4.Goal of this term78關(guān)于考試 考試體型： (20分)填空題: 基本公式、基本概念 (4分/個(gè)) (80分)計(jì)算題: 5選4 (20分/個(gè))比如: 求體系的拉氏量、哈密頓量、求運(yùn)動(dòng)方程、求哈密頓雅克比方程以及它們的應(yīng)用，求慣性張量等！ 910內(nèi)容內(nèi)容1. 體系的獨(dú)立完備狀態(tài)量 廣義坐標(biāo)、廣義速度 自由度 約束 拉式量、拉格朗日函數(shù)2221231(1): ()(,)2(2): (,)( ),( ),( ) (,).; ( ,)aaaaaaaaaaaaiaiaiaaiaiLTVmxy