Sponsored Links
This presentation is the property of its rightful owner.
1 / 37

第三章 运动的守恒定律 PowerPoint PPT Presentation


  • 131 Views
  • Uploaded on
  • Presentation posted in: General

第三章 运动的守恒定律. 研究对象: 质点系统 ;系统的过程问题,确立和认识运动的 守恒定律:能量守恒、动量守恒、角动量守恒. 重力. 保守力. 弹性力. 万有引力. §3-1 保守力 成对力作功 势能. 1 、 保守力 ( conservative force ) 功的大小只与物体的 始末位置 有关,而与所经历的路径无关,这类力叫 保守力 。. 非保守力:作功与物体运动路径有关的力,如摩擦力、爆炸力。. 保守力沿闭合路径一周所做的功为零 。这一结论也可以作为保守力的定义,它和保守力的功与路径无关的定义是完全等价的。. f 2. f 1 = -f 2. 1.

Download Presentation

第三章 运动的守恒定律

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript



3-1

1(conservative force )



f2

f1-f2

1

2

2

f1f2



3potential energy


SIJ


37

ab


1

2

3

3


4


F x dx

38


38


3-2 work-energy theorem

1system of particles

external frce(internal force)

39


2

12


1

2AicEp


3

4


3-3

1


2


3-4

1(center of mass)

i




.


2theorem of motion of center - of mass)

n

316

317



318



3(conservation law of momentum)



:

:


3-5



3-6

  • 1angular momentum of a particle)

r p


kg m2/s


2law of conservation of angular momentum

1


t

2


moment of force)

OrFOL


  • Login