上海交通大学：《大学物理教程》课程电子教案（课件讲稿）第6章 振动力学基础 6.3 微振动的简谐近似

北京大学物理学院：《数学物理方法》课程教学资源（电子讲义）第一部分 复变函数 第二讲 初等函数和多值函数

上海交通大学：《大学物理教程》课程电子教案（课件讲稿）第6章 振动力学基础 6.1 简谐振动动力学

北京大学物理学院：《数学物理方法》课程教学资源（电子讲义）第一部分 复变函数 第一讲 解析函数

All around us: wheels, skaters, ballet, gymnasts, helicopter, rotors, mobile engines, CD disks, … Atomic world: electrons— “spin”, “orbit”. Universe: planets spin and orbiting the sun, galaxies spin, …

1. Differential equation of a simple harmonicoscillation and its solution

Collisions: All around us (cars, buses) Grand astronomical scale (stars, galexies) Nuclear, atomic and molecular physics The impulse-momentum theorem relates the change in the momentum of a system to the total force on it and the time interval during which this total forces acts

1. Why we introduce the concepts of work and energy? F ma CWE theorem r r total = CWE theorem Conservation of energy (More universal) 2. About the systems that we discuss Ignore the size, internal structure, internal motion, deformations, and thermal effects

Wave motion is the most universal physical phenomenon, we discover the wave motion all around us. Mechanical waves—acoustic wave, water wave Electromagnetic waves—radio, light wave Matter waves—electron wave

一、几个概念 1.宇宙时间和空间联合