ГДЗ. Физика 9кл_Перышкин_Гутник_2001

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1

	Kh^ _ j`Zgb _
<hijhku	............................... 7
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MijZ`g_gby ...........................	39
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4

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5

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EZ[hjZlhjgu_ jZ[hlu ..................	64
EZ[hjZlhjgZy jZ[hlZ ‹ .................	64
EZ[hjZlhjgZy jZ[hlZ ‹ .................	67
EZ[hjZlhjgZy jZ[hlZ ‹ .................	67
EZ[hjZlhjgZy jZ[hlZ ‹ .................	68
EZ[hjZlhjgZy jZ[hlZ ‹ .................	69
EZ[hjZlhjgZy jZ[hlZ ‹ .................	70

6

<hijhku

§1.

FZl_jbZevgZy lhqdZ h[eZ^Z_l fZkkhc gh bf__l ij_g_[j_`bfh fZeu1. _ jZaf_ju

FZl_jbZevgZy lhqdZ ²wlh Z[kljZdlgh_ ihgylb_ 2. >ey mijhs_gby aZ^Zq

3. Dh]^Z \ mkeh\bb aZ^Zqb jZaf_jZfb wlh]h l_eZ fh`gh ij_g_[j_qv 4. AZ fZl_jbZevgmx lhqdm fh`gh ijbgylv Z\lhfh[bev ijb hij5. _^_e_gbb _]h kdhjhklb gZ fZjrjml_ ] Ijhl\bgh ± ] Fhkd\Z Wlhl `_ Z\lhfh[bev g_evay kqblZlv fZl_jbZevghc lhqdhc ijb jZkq_l_ ^Z\e_gby hdZau\Z_fh]h bf gZ ^hjh]m

Ijb ihklmiZl_evghf ^\b`_gbb

6. FZl_jbZevghc lhqdhc gZau\Z_lky l_eh jZaf_jZfb dhlhjh]h fh`gh7. ij_g_[j_qv \ mkeh\byo ^Zgghc aZ^Zqb

Ijb ijyfhebg_cghf ^\b`_gbb l_eZ

8. Kbkl_fZ hlkq_lZ hlghkbl_evgh dhlhjhc jZkkfZljb\Zxl ^\b`_gb_ ij9. _^klZ\ey_l kh[hc kh\hdmighklv kbkl_fu dhhj^bgZl ijb[hjZ ^ey baf_j_gby \j_f_gb b lhqdb hlkq_lZ k dhlhjhc k\yaZgZ kbkl_fZ dhhj^bgZl

§2.

G_l \k_ aZ\bkbl hl ljZ_dlhjbb ^\b`_gby G_evay magZlv ]^_ [m^_l Z\lhfh[bev1. q_j_a qZk _keb g_ agZ_rv ih dZdbf ^hjh]Zf hg ih_^_l <_dlhj gZijZ\e_gguc hl lhqdb hlkq_lZ gZqZeZ ^\b`_gby d lhqd_

hlkq2. _lZ dhgpZ ^\b`_gby l_eZ 3. Fh`gh

§3.

<uqbke_gby ijhba\h^yl kh kdZeyjgufb \_ebqbgZfb

1. ?keb \_dlhj khgZijZ\e_g k hkvx lh _]h ijh_dpby gZ g__ [m^_l iheh`bl2. _evgZ b gZh[hjhl _keb \_dlhj ijhlb\hiheh`gh gZijZ\e_g hkb lh _]h ijh_dpby gZ g__ [m^_l hljbpZl_evgZ

3. o1 = o0 + so.

§4.

Kdhjhklvx jZ\ghf_jgh]h ijyfhebg_cgh]h ^\b`_gby gZau\Z_lky ihklhygguc1. \_dlhj v jZ\guc hlghr_gbx i_j_f_s_gby s l_eZ aZ ex[hc ijhf_`mlhd \j_f_gb t d agZq_gbx wlh]h ijhf_`mldZ v = s .

t

7

2.

Ih nhjfme_ sx = vxt.

3.

Ijb ijyfhebg_cghf jZ\ghf_jghf ^\b`_gbb

4.

Wlh \b^gh ba jbk mq_[gbdZ

5.

Hgb ^\b`mlky jZ\ghf_jgh \ jZaguo gZijZ\e_gbyo kh kdhjhklyfb

jZ\gufb ih fh^mex b df q

1.

D g_jZ\ghf_jghfm ^\b`_gbx

§5.

2.

Kdhjhklv l_eZ \ ^Zgghc lhqd_ \ ^Zgguc fhf_gl \j_f_gb

3.

Mkdhj_gb_f jZ\ghmkdhj_ggh]h ^\b`_gby l_eZ

a

gZau\Z_lky

\ ebqbgZ jZ\gZy hlghr_gbx baf_g_gby kdhjhklb v d ijhf_`mldm

\j_f_gb t aZ dhlhjuc wlh baf_g_gb_ ijhbahreh a =

v =

v − v0

.

4.

>\b`_gb_ k ihklhygguf mkdhj_gb_f

t

t

5.

Hg ihdZau\Z_l [ukljhlm baf_g_gby fh^mey \_dlhjZ kdhjhklb

6.

< kbkl_f_ KB f k2.

7.

M\_ebqb\Z_lky ijb iheh`bl_evghf mkdhj_gbb

\

wlhf kemqZ_

\ dlhj kdhjhklb b \_dlhj mkdhj_gby khgZijZ\e_gu mf_gvrZ_lky²

ijb hljbpZl_evghf \ wlhf kemqZ_

\_dlhj kdhjhklb b \_dlhj

mkdhj_gby ijhlb\hiheh`gh gZijZ\e_gu

§6.

1.

Z vx = v0x + axt [ vx = axt.

2.

< h[hbo kemqZyo ijyfZy \ kemqZ_ ©Zª ²ijhoh^ysZy q_j_a gZqZeh

kbkl_fu dhhj^bgZl

3.

Wlb ^\b`_gby jZ\ghmkdhj_ggu_ h^gZdh \

i_j\hf kemqZ_

mkdhj_gb_ iheh`bl_evgh Z \h \lhjhf²hljbpZl_evgh

§7.

1.

Ijh_dpby \_dlhjZ i_j_f_s_gby \uqbkey_lky ih nhjfme_

sx = v0 x t +

axt 2

.

Ih^klZ\bf \ wlm nhjfmem \ujZ` gb_ ^ey ijh_dpbb mkdhj_gby

2

ax =

vx − v0 x

.

Ihemqbf

t

sx

= v0 xt +

vx − v0 x

t 2

=

v0 x + vx

t .

t

2

2

8

LZd dZd v0x =	AO, vx = BC, t = OB kf jbk Z mq_[gbdZ lh fu
ihemqZ_f qlh ijh dpby \_dlhjZ i_j_f_s_gby sx			=	AO + BC	OB
jZ\gZ iehsZ^b nb]mju OACB ²ijyfhm]hevghc ljZi_pbb k
			2
hkgh\Zgbyfb AO, BC b \ukhlhc OB.
2. sx = v0 x t +	axt 2
		.
	2

§8.

1.	Ih nhjfme_ sx					=		2	²^ey ijh_dpbb i_j_f_s_gby s =		—
							ax t			at 2
^ey fh^mey \_dlhjZ i_j_f_s_gby										2
							2
2.	< n2 jZa ihkdhevdm s ~ t2
		s	n	=	a(nt )2 / 2	= n2 .
3.					1
					at 2 / 2
4.		st
	DZd jy^ ihke_^h\Zl_evguo g_q_lguo qbk_e
			1		1
5.	>ey hij_^_e_gby jZ\ghmkdhj_ggh]h ^\b`_gby

< jZaguo kbkl_fZo hlq_lZ wlb \§9_ebqbgu. bf_xl jZagu_ agZq_gby b ih1. jZaghfm hjb_glbjh\Zggu

RZjbd iZ^Zxsbc gZ ihe ^\b`ms_]hky Z\lhfh[bey g_ bf__l ]hjbahglZevghc2. kdhjhklb hlghkbl_evgh g_]h Hlghkbl_evgh A_feb hg bf__l kdhjhklv jZ\gmx kdhjhklb Z\lhfh[bey

Kdhjhklv imlv ljZ_dlhjby b l ^ jZaebqgu \ jZaguo kbkl_fZo hlkq3. _lZ

=_ebhp_gljbq_kdZy kbkl_fZ k\yaZgZ k Khegp_f ]_hp_gljbq_kdZy ²4. k A_fe_c

5. Kf_gZ ^gy b ghqb h[tykgy_lky \jZs_gb_f A_feb \hdjm] k\h_c hkb

JZ\ghf_jgh b ijyfhebg_cgh §10beb.ihdhblky 1. G_l

2. L_hjby :jbklhl_ey aZdexqZxsZyky \ lhf qlh ijb hlkmlkl\bb \g3. _rg_]h \ha^_ckl\by l_eh fh`_l lhevdh ihdhblvky

L_f qlh ih =Zebe_x l_eZ fh]ml jZ\ghf_jgh ^\b]Zlvky \ hlkmlkl\bb4. \g_rgbo kbe

Hiul bah[jZ`_gguc gZ jbk mq_[gbdZ ^hdZau\Z_l lh qlh ihfbfh5. bg_jpbZevguo kbkl_f hlkq_lZ \ dhlhjuo \uihegy_lky i_j\uc aZdhg GvxlhgZ kms_kl\mxl kbkl_fu bgh]h oZjZdl_jZ Hg

9

khklhbl \ ke_^mxs_f GZ l_e_`d_ h^bg rZjbd e_`bl gZ ]hjbahglZevghc ih\_joghklb Z \lhjhc ih^\_rb\Z_lky gZ gblb KgZqZeZ l_e_`dZ ^\b`_lky ijyfhebg_cgh b jZ\ghf_jgh b \ wlhf kemqZ_ h[Z rZjbdZ gZoh^ylky \ ihdh_ hlghkbl_evgh l_e_`db Klhbl lhevdh ijb^Zlv l_e_`d_ mkdhj_gb_ eb[h __ ijblhjfhablv eb[h ih^lhedgmlv dZd rZjbdb ijb^ml \ ^\b`_gb_ k mkdhj_gb_f hlghkbl_evgh l_e_`db LZdbf h[jZahf hlghkbl_evgh l_e_`db i_j\uc aZdhg GvxlhgZ g_ \uihegy_lky

Kms_kl\mxl kbkl_fu hlkq_lZ hlghkbl_evgh dhlhjuo l_eZ khojZgyxl6. k\hx kdhjhklv g_baf_gghc _keb gZ gbo g_ ^_ckl\mxl \g_rgb_ kbeu beb bo ^_ckl\b_ kdhfi_gkbjh\Zgh LZdb_ kbkl_fu gZau\Zxlky bg_jpbZevgufb

Bg_jpbZevgu_ kbkl_fu m^h\e_l\hjyxl i_j\hfm aZdhgm GvxlhgZ g7._bg_jpbZevgu_²g_l

Fh`gh 8. G_l

9.

Ijbeh`_ggZy d l_em kbeZ

§11.

1. Q_f [hevr_ fhsghklv Z\lhfh[bey Z khhl\_lkl\_ggh _]h kbeZ ly]b2. l_f [uklj__ hg m\_ebqb\Z_l k\hx kdhjhklv

Hiul bah[jZ`_gguc gZ jbk mq_[gbdZ ^hdZau\Z_l lh qlh ijbeh`3. _ggZy d l_em kbeZ y\ey_lky ijbqbghc mkdhj_gby >ey ijh\_^_gby ^Zggh]h hiulZ gZ^h \aylv l_e_`dm mklZgh\blv gZ g_c ^\Z h^bgZdh\h jZ[hlZxsbo \_glbeylhjZ b dZi_evgbpm >ey dhfi_gkZpbb kbeu lj_gby ijbdj_ibf d l_e_`d_ h^bg ba dhgph\ gblb i_j_dbgmlhc q_j_a [ehd Z d ^jm]hfm dhgpm gblb ih^\_kbf ]jma AZl_f hldjh_f djZg dZi_evgbpu b \dexqbf h[Z \_glbeylhjZ Ih^ ^_ckl\b_f kbeu \_glbeylhjh\ l_e_`dZ ijb^_l \ ^\b`_gb_ Ijb wlhf gZ klhe [m^ml iZ^Zlv dZieb q_j_a h^bgZdh\u_ ijhf_`mldb \j_f_gb L_i_jv _keb baf_jylv jZkklhygby f_`^m khk_^gbfb dZieyfb lh fh`gh m[_^blvky qlh wlb jZkklhygby [m^ml hlghkblvky dZd jy^ ihke_^h\Zl_evguo g_q_lguo qbk_e LZdbf h[jZahf fh`gh aZdexqblv qlh l_e_`dZ ^\b]ZeZkv jZ\ghmkdhj_ggh kf § IhkqblZ_f mkdhj_gb_ ih nhjfme_ a = 2s aZf_jb\ ijhc^_ggh_ l_e_`dhc jZkklhygb_ s b \j_fy __ ^\b`t 2gby ?keb mf_gvrblv kbem ^_ckl\mxsmx gZ l_e_`dm \ ^\Z jZaZ \udexqt _gb_f h^gh]h ba \_glbeylhjh\ b kgh\Z ihkqblZlv mkdhj_gb_ lh hgh ihemqblky \ ^\Z jZaZ f_gvrbf q_f i_j\uc jZa ?keb l_i_jv m\_ebqblv fZkkm l_e_`db \ ^\Z jZaZ ^h[Z\e_gb_f d l_e_`d_ ]jmaZ fZkkhc jZ\ghc fZkk_ l_e_`db b kgh\Z ihkqblZlv

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