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10.2 中心力场中质点运动规律 PowerPoint PPT Presentation


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飞行轨道. θ. o. 地球. 图 10.9 中心力场中质点 P 的速度. 10.2 中心力场中质点运动规律. 质点在中心力场中运动时,动量矩是守恒的。. 质点在中心力场中运动时,能量是守恒的 。. e>1. e=1. 0<e<1. e=0. 地球. a. a. r. b. θ. A. F. l. b. r p. r a. 开普勒第一定律: 所有行星都以太阳为焦点的椭圆轨道上运行。. 开普勒三定律. V. 开普勒第二定律: 单位时间内矢量 r 扫过的面积为常数。. P. r d θ. r. d θ. θ. F.

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10.2 中心力场中质点运动规律

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o

10.9 P

10.2


e>1

e=1

0<e<1

e=0

a

a

r

b

A

F

l

b

rp

ra



V

r

P

r d

r

d

F

10.12 dt

dtr


ab,


10.3


v1

R

:

r=R, e=0, =0


e=1

v2

R

r=R, e=1, =0


1.

vs2

2. vE

3.

vS2/E


v4c

r4

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e=0

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10.4

10.4

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10.5

1.

2.

1.

2.


a

b


a

10.16


    • 1.;

    • 2.

    • 3.


10.6

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