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47
0
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∑ Kr = 0 .
Fhf_glhlp_gljh[_`guokbebg_jpbb
M r = (mrr + mrd )ar& 2 + ms1r& 2l3 + ms r& 2l 2 ,
]^_ a – jZkklhygb_ f_`^m hkyfb pbebg^jh\ l2 , l3 – jZkklhygb_ f_`^m
kj_^gbfbbdjZcgbfbs_dZfbdhe_gqZlh]h\ZeZ
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Kbeu bg_jpbb i_j\h]h ihjy^dZ hl \ha\jZlgh-ihklmiZl_evgh ^\b`m-
sbokyfZkk
j1 = m j r& kRV. ,
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Pj21p = m j r& 2 kRV(180 + .) = − m j r& 2 cos. ,
]^_ m j = mi + mri - fZkkZ \ha\jZlgh-ihklmiZl_evgh ^\b`msboky ^_lZe_c
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KmffZwlbokbe ∑ P j1 = 0 l_kbeui_j\h]hihjy^dZmjZ\gh\_r_gu
Fhf_glhlwlbokbe
M j1 = Pj1a = m j r& 2 akRV.
g_mjZ\gh\_r_g,b_]hfZdkbfZevgZy\_ebqbgZkhklZ\ey_l
M j1 max = m j r& 2 a .
>Zggucfhf_glg_[m^mqbmjZ\gh\_r_ggufi_j_^Z_lkygZhihju
^\b]Zl_eyihwlhfm_]hmjZ\gh\_rb\Zxl
Kbeubg_jpbbhl\ha\jZlgh-ihklmiZl_evgh^\b`msbokyfZkk\lhjh]h
ihjy^dZ
j 2 = m j r& kRV. ,
P1p 2
2 = m j r& cos2(180 + .) = m j r& kRV. ,
Pj2p 2 2
]^_ -hlghr_gb_jZ^bmkZdjb\hrbiZd^ebg_rZlmgZ
KmffZwlbokbe
∑ P j 2 = 2m j r& kRV. .
2
FZdkbfZevgh_agZq_gb_
47
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