Файл: ГДЗ. Физика 9кл_Перышкин_Гутник_2001.pdf

T =

t

, ν =

1

=

N

.

T

N

t

Baf_jyy i_jbh^ b qZklhlm ijb jZaguo agZq_gbyo ^ebgu fZylgbdZ

fu l_f kZfuf ihemqZ_f aZ\bkbfhklv i_jbh^Z b qZklhlu hl ^ebgu

Ijbf_j \uiheg_gby jZ[hlu.

‹ hiulZ

1

2

3

4

5

Nba \_e

l kf

5

20

45

80

125

N

30

30

30

30

30

t, c

13

27

40

53

67

T, c

0,43

0,9

1,33

1,77

2,23

ν, =p

2,31

1,11

0,75

0,57

0,45

Ba ^Zgguo \ lZ[ebp_ fh`gh aZf_lblv lZdmx aZdhghf_jghklv q_f

[hevr_ ^ebgZ fZylgbdZ l_f [hevr_ i_jbh^ b f_gvr_ qZklhlZ b

gZh[hjhl

>hihegbl_evgh_ aZ^Zgb_.

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kms_kl\m_l f_`^m ^ebghc fZylgbdZ b i_jbh^hf _]h dhe_[Zgbc

T

≈ 2

T

≈ 3

T4

≈ 4

T

≈ 5

2

3

5

T1

T

T

T

1

1

1

l2

= 4

l3

= 9

l4

= 16

l 2

= 25

l1

l

l

1

1

1

Ba ^Zgguo

\

lZ[ebp_ ohjhrh

ijhkfZljb\Z_lky

k\yav f_`^m i_jbh^hf

T

lk

k

=

]^_ k fh`_l ijbgbfZlv

dhe_[Zgbc fZylgbdZ b _]h ^ebghc

T1

l

1

b

EZ[hjZlhjgZy jZ[hlZ ‹

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P_ev jZ[hlu bamqblv y\e_gb_ we_dljhfZ]gblghc bg^mdpbb

DZd ba\_klgh y\e_gb_ we_dljhfZ]gblghc bg^mdpbb aZdexqZ_lky

\ \hagbdgh\_gbb we_dljbq_kdh]h lhdZ \ aZfdgmlhf ijh\h^gbd_ ijb

baf_g_gbb fZ]gblgh]h ihlhdZ ijhgbau\Zxs_]h ho\Zq_ggmx

ijh\h^gbdhf iehsZ^v

Ijbf_j \uiheg_gby jZ[hlu.

1.

K[hjdZ mklZgh\db jbk mq_[gbdZ

2.

< i_j\hf hiul_ bg^mdpbhgguc lhd \hagbdZe \ dZlmrd_ \ kemqZ_

dh]^Z fZ]gbl ^\b]Zeky hlghkbl_evgh dZlmrdb Ijb lhjfh`_gbb

fZ]gblZ kbeZ bg^mdpbhggh]h lhdZ

j_adh \hajZklZeZ b

iZ^ZeZ ^h

gmey dh]^Z fZ]gbl hklZgZ\eb\Zeky ihdhbeky

3.

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bg^mdpbhggh]h lhdZ L _ fZ]gblguc ihlhd Φ ijhgbau\Zxsbc dZlmrdm

f_gyeky \f_kl_ k bg^mdpbhgguf lhdhf l _ \h \j_fy ^\b`_gby fZ]gblZ

4.

Bg^mdpbhgguc lhd \hagbdZe

\

dZlmrd_ ijb baf_g_gbb

fZ]gblgh]h ihlhdZ ijhgbau\Zxs_]h wlm dZlmrdm

5.

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l d fZ]gblguc ihlhd aZ\bkbl hl fh^mey \_dlhjZ fZ]gblghc

bg^mdpbb B fh^mev wlh]h \_dlhjZ g_ ihklhyg_g l d fZ]gblgh_

ihe_ ihklhyggh]h fZ]gblZ g_h^ghjh^gh

6.

GZijZ\e_gb_ bg^mdpbhggh]h lhdZ [m^_l jZaebqguf ijb

ijb[eb`_gbb fZ]gblZ d dZlmrd_ b m^Ze_gbb _]h hl g__

7.

Q_f [hevr_ kdhjhklv ^\b`_gby fZ]gblZ hlghkbl_evgh dZlmrdb

l f [hevr_ fZ]gblguc ihlhd Φ

Z ke_^h\Zl_evgh b agZq_gb_

bg^mdpbhggh]h lhdZ

8.

K[hjdZ mklZgh\db jbk mq_[gbdZ

9.

Bg^mdpbhgguc lhd \hagbdZ_l \ kemqZyo Z b \

10.

FZ]gblguc ihlhd f_gy_lky \ kemqZyo Z b \

11.

<hagbdgh\_gb_ we_dljbq_kdh]h lhdZ \ fh^_eb ]_g_jZlhjZ jbk

mq_[gbdZ Bg^mdpbhgguc lhd \hagbdZ_l \ jZfd_ \jZsZxs_cky

\

fZ]gblghf ihe_ \ke_^kl\b_

baf_g_gby fZ]gblgh]h

ihlhdZ

y\e_gb_ we_dljhfZ]gblghc bg^mdpbb

EZ[hjZlhjgZy jZ[hlZ ‹

Bamq_gb_ ^_e_gby y^_j mjZgZ ih nhlh]jZnbyf lj_dh\

P_ev jZ[hlu m[_^blvky \ kijZ\_^eb\hklb aZdhgZ khojZg_gby

bfimevkZ gZ ijbf_j_ ^_e_gby y^_j mjZgZ

Ijbf_j \uiheg_gby jZ[hlu.

AZ^Zgb_ Y^jh mjZgZ ijb aZo\Zl_ g_cljhgZ jZa^_ey_lky ijbf_jgh gZ

^\_ jZ\gu_ qZklb dhlhju_ gZau\Zxlky hkdhedZfb ^_e_gby Ijb wlhf

hkdhedb jZae_lZxlky \ ijhlb\hiheh`gu_ klhjhgu Wlh

fh`gh

h[tykgblv gZ hkgh\_ aZdhgZ khojZg_gby bfimevkZ Bfimevk y^jZ

mjZgZ ^h aZo\ZlZ g_cljhgZ ijZdlbq_kdb jZ\_g gmex Ijb aZo\Zl_

g_cljhgZ y^jh ihemqZy hl g_]h g_dhlhjuc bfimevk jZkdZeu\Z_lky gZ

^\_ jZae_lZxsboky qZklb fZkkZfb

m1

b

2 ?keb aZibkZlv aZdhg

khojZg_gby bfimevkZ 0 = m v′ + m v′ lh kjZam \b^gh qlh kdhjhklb

h[jZah\Z\rboky hkdhedh\ ijhlb\hiheh`gh gZijZ\e_gu ^jm] ^jm]m b

1

1

2

2

ke_^h\Zl_evgh qZklbpu jZae_lZxlky \ ijhlb\hiheh`gu_ klhjhgu

AZ^Zgb_ . 92 U+0 n →

56 Ba+Z X +20 n <

kbem aZdhgZ khojZg_gby

aZjy^Z aZibr_f

Z + 2 Hlkx^Z ihemqZ_f

Ih

lZ[ebp_ > B F_g^_e__\Z hij_^_ey_f qlh wlh y^jh djbilhgZ