ГДЗ. Физика 9кл_Перышкин_Гутник_2001
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§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_
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§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 .
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Ijb ijyfhebg_cghf jZ\ghf_jghf ^\b`_gbb |
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Wlh \b^gh ba jbk mq_[gbdZ |
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jZ\gufb ih fh^mex b df q |
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D g_jZ\ghf_jghfm ^\b`_gbx |
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Kdhjhklv l_eZ \ ^Zgghc lhqd_ \ ^Zgguc fhf_gl \j_f_gb |
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Hg ihdZau\Z_l [ukljhlm baf_g_gby fh^mey \_dlhjZ kdhjhklb |
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< kbkl_f_ KB f k2. |
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M\_ebqb\Z_lky ijb iheh`bl_evghf mkdhj_gbb |
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mkdhj_gby ijhlb\hiheh`gh gZijZ\e_gu |
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§6. |
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Z vx = v0x + axt [ vx = axt. |
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< h[hbo kemqZyo ijyfZy \ kemqZ_ ©Zª ²ijhoh^ysZy q_j_a gZqZeh |
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kbkl_fu dhhj^bgZl |
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Wlb ^\b`_gby jZ\ghmkdhj_ggu_ h^gZdh \ |
i_j\hf kemqZ_ |
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mkdhj_gb_ iheh`bl_evgh Z \h \lhjhf²hljbpZl_evgh |
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§7. |
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Ijh_dpby \_dlhjZ i_j_f_s_gby \uqbkey_lky ih nhjfme_ |
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sx = v0 x t + |
axt 2 |
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Ih^klZ\bf \ wlm nhjfmem \ujZ` gb_ ^ey ijh_dpbb mkdhj_gby |
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ax = |
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vx − v0 x |
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v0 x + vx |
t . |
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LZd dZd v0x = |
AO, vx = BC, t = OB kf jbk Z mq_[gbdZ lh fu |
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ihemqZ_f qlh ijh dpby \_dlhjZ i_j_f_s_gby sx |
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AO + BC |
OB |
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jZ\gZ iehsZ^b nb]mju OACB ²ijyfhm]hevghc ljZi_pbb k |
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hkgh\Zgbyfb AO, BC b \ukhlhc OB. |
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2. sx = v0 x t + |
axt 2 |
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§8.
1. |
Ih nhjfme_ sx |
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²^ey ijh_dpbb i_j_f_s_gby s = |
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ax t |
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^ey fh^mey \_dlhjZ i_j_f_s_gby |
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2. |
< n2 jZa ihkdhevdm s ~ t2 |
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a(nt )2 / 2 |
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at 2 / 2 |
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DZd jy^ ihke_^h\Zl_evguo g_q_lguo qbk_e |
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5. |
>ey hij_^_e_gby jZ\ghmkdhj_ggh]h ^\b`_gby |
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< jZaguo kbkl_fZo hlq_lZ wlb \§9_ebqbgu. bf_xl jZagu_ agZq_gby b ih1. jZaghfm hjb_glbjh\Zggu
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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
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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
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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
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