Page 515 - index
P. 515
ȿɝɟɪ ɨԙ ɠɚԕ ɛԧɥiɤ ɚɥɵɧɵɩ ɬɚɫɬɚɥɵɩ, ɫɨɥ ɛԧɥiɤɬiԙ ɬɟԙɞiɝi ԕɚɪɚɥɚɬɵɧ ɛɨɥɫɚ,
ɨɧɞɚ ɤԧɥɞɟɧɟԙ ɤԛɲ (Qi) ɬԧɦɟɧ ɛɚԑɵɬɬɚɥɵɩ, ɚɥ ɢɸɲi ɦɨɦɟɧɬ (Ɇi) ɫɚԑɚɬ ɬiɥiɧɟ
ԕɚɪɫɵ ɛɚԑɵɬɬɚɥɚɞɵ. Ʉɟɪiɫiɧɲɟ, ɟɝɟɪ ɨԙ ɠɚԕ ɛԧɥiɤɬiԙ ɬɟԙɞiɝi ԕɚɪɚɥɫɚ, ɨɧɞɚ
ɤԧɥɞɟɧɟԙ ɤԛɲ ɠɨԑɚɪɵ ԕɚɪɚɣ ɛɚԑɵɬɬɚɥɵɩ, ɚɥ ɢɸɲi ɦɨɦɟɧɬ ɫɚԑɚɬ ɬiɥiɧiԙ
ɚɣɧɚɥɭɵɦɟɧ ɛɚԑɵɬɬɚɥɚɞɵ (80-ɫɭɪɟɬ).
ȱɲɤɿ ɤԛɲɬɟɪɞɿԙ ɷɩɸɪɚɥɚɪɵɧ ɬԝɪԑɵɡɭԑɚ ɦɵɫɚɥɞɚɪ ɤɟɥɬɿɪɟɣɿɤ.
1-ɦɵɫɚɥ. Ɉԙ ɠɚԑɵɧɞɚ ɤɨɧɫɨɥɿ ɛɚɪ, ɟɤɿ ɬɿɪɟɤɬɿ ɚɪԕɚɥɵԕɬɵ ɚɥɵɩ ԕɚɪɚɣɵԕ
(78-ɫɭɪɟɬɬɟ ɟɤɿ ɬɿɪɟɤɬɿԙ ɚɪɚɫɵɧɵԙ ԝɡɵɧɞɵԑɵ 6 ɦɟɬɪ, ɤɨɧɫɨɥɶɞɵԙ ԝɡɵɧɞɵԑɵ
2 ɦɟɬɪ).
78-ɫɭɪɟɬ
Ȼԝɥ ɚɪԕɚɥɵԕɬɵ yAz ɤɨɨɪɞɢɧɚɬɚɥɚɪ ɠԛɣɟɫɿɧɞɟ ԕɚɪɚɫɬɵɪɚɦɵɡ. «Ⱥ»
ɬɿɪɟɝɿɧɞɟ ɟɤɿ ɪɟɚɤɰɢɹɥɚɪ ɩɚɣɞɚ ɛɨɥɚɞɵ, ɨɥɚɪ – RȺ ɠԥɧɟ HȺ. Ⱥɥ «ȼ»
ɬɿɪɟɝɿɧɞɟ ɛɿɪ ɪɟɚɤɰɢɹ – Rȼ ɩɚɣɞɚ ɛɨɥɚɞɵ. Ȼԝɥ ɟɫɟɩɬɟ, ɠɨԑɚɪɵɞɚ ɤԧɪɫɟɬɿɥɝɟɧ
ɟɤɿ ɲɚɪɬ ɬɚ ɨɪɵɧɞɚɥɵɩ ɨɬɵɪ. Ԧɣɬɤɟɧɿ ɚɪԕɚɥɵԕɬɚ ԛɲ ɛɚɣɥɚɭ ɛɚɪ, ɚɥ ɨɥɚɪɞɵԙ
ɛɚԑɵɬɬɚɪɵ ɛɿɪ ɧԛɤɬɟ ɚɪԕɵɥɵ ԧɬɩɟɣɞɿ. ɋɨɧɞɵԕɬɚɧ 78-ɫɭɪɟɬɬɟ ɤԧɪɫɟɬɿɥɝɟɧ ԛɲ
ɛɟɥɝɿɫɿɡ ɪɟɚɤɰɢɹɥɚɪɞɵ (RȺ, Rȼ ɠԥɧɟ HȺ) ɬɚɛɭ ԛɲɿɧ, ɫɬɚɬɢɤɚɧɵԙ
ɠɚɡɵԕɬɵԕɬɚԑɵ ԛɲ ɬɟԙɞɟɭiɧ ԕԝɪɚɦɵɡ. Ɉɥɚɪ:
1) 6z=0; HA=0.
Ȼԝɥ ɬɟԙɞɿɤɬɟɧ ɤɟɥɟɫɿɞɟɣ ԕɨɪɵɬɵɧɞɵ ɠɚɫɚɣɦɵɡ: ɟɝɟɪ ɫɵɪɬԕɵ ɤԛɲɬɟɪ
ɚɪԕɚɥɵԕɬɵԙ ɨɫiɧɟ ɩɟɪɩɟɧɞɢɤɭɥɹɪ ɛɨɥɫɚ, ɨɧɞɚ ɝɨɪɢɡɨɧɬɚɥɶ ɛɚԑɵɬɬɚԑɵ
ɪɟɚɤɰɢɹ ԥɪɭɚԕɵɬɬɚ ɧԧɥɝɟ ɬɟԙ ɛɨɥɚɞɵ.
2) 6MA=0; -P 3- P 8+RB 6 =0 RB=4,4 (ɬ),
3) 6MB=0; -P 3+ P 2-RA 6=0 RA=0,4 (ɬ).
ɋɭɪɟɬɬɟ ɤԧɪɫɟɬɿɥɝɟɧ ɚɪԕɚɥɵԕɬɵԙ ɛɟɤɿɬɿɥɭ ɟɪɟɤɲɟɥɿɝiɧɟ ɛɚɣɥɚɧɵɫɬɵ,
ɬɿɪɟɤɬɟɪɞɟɝi ɪɟɚɤɰɢɹɥɚɪɞɵ ɬɚɛɭ ԛɲiɧ ɫɬɚɬɢɤɚɧɵԙ ɟɤɿ ԑɚɧɚ ɬɟԙɞɟɭɿɧ
ԕɨɥɞɚɧɞɵԕ. ɋɨɧɞɵԕɬɚɧ ԛɲɿɧɲɿ ɬɟԙɞɟɭɞi 6Y=0, ɨɫɵ ɬɚɛɵɥԑɚɧ
ɪɟɚɤɰɢɹɥɚɪɞɵԙ ɦԥɧɞɟɪɿɧɿԙ ɞԝɪɵɫɬɵԑɵɧ ɬɟɤɫɟɪɭ ԛɲiɧ ԕɨɥɞɚɧɚɦɵɡ.
4) 6Y=0; RA -2,4-2,4+ RB = 0 0 { 0 .
ɋɨԙԑɵ ɬɟԙɞɟɭɞɿԙ ɧԥɬɢɠɟɫɿɧɞɟ ɚɥɵɧԑɚɧ ɬɟɩɟ-ɬɟԙɞɿɤ, ɬɚɛɵɥԑɚɧ
ɪɟɚɤɰɢɹɥɚɪɞɵԙ ɦԥɧɞɟɪɿɧɿԙ ɞԝɪɵɫɬɵԑɵɧ ɤԧɪɫɟɬɟɞɿ. ȿɧɞɿ ɨɫɵ ɚɪԕɚɥɵԕɬɵԙ
ɷɩɸɪɚɥɚɪɵɧ ɬԝɪԑɵɡɚɣɵԕ (79-ɫɭɪɟɬ).
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