Page 55 - index

¦ Fiy 0Ÿ FA S ˜ sin § S I · P 0,
©¨ 2 ¸¹

¦ M A (Fi ) 0Ÿ P ˜ AB ˜ sin I S ˜ AB ˜ sin(S 2I ) 0.
2

Ȼԝɥ ɬɟԙɞɟɭɥɟɪɝɟ ɟԙ ԛɥɤɟɧ ԛɣɤɟɥɿɫ ɤԛɲɿɧɿԙ ɮɨɪɦɭɥɚɫɵɧ ԕɨɫɚɦɵɡ, ɹԑɧɢ

FA f ˜ N A .

Ⱥɥɵɧԑɚɧ ɬɟԙɞɟɭɥɟɪɞɿ ɲɟɲɿɩ, ɿɡɞɟɥɿɩ ɨɬɵɪԑɚɧ ɲɚɦɚɥɚɪɞɵ ɚɧɵԕɬɚɣɦɵɡ,
ɨɥɚɪ:

I arctg 3 , NA 3P ,
f 4˜ f

S P 9 f 2 , FA 3P .
4˜ f 4

ȿɫɟɩɬɿԙ ԕɨɣɵɥɭ ɲɚɪɬɵ ɛɨɣɵɧɲɚ, ɫɵɪɵԕɬɵԙ ɬɟɩɟ-ɬɟԙɞɿɝɿ ɨɪɵɧɞɚɥɚɬɵɧ I

ɛԝɪɵɲɵɧɵԙ ɟԙ ɤɿɲɿ ɲɚɦɚɫɵɧ ɚɧɵԕɬɚɞɵԕ. ɋɨɧɵɦɟɧ ԕɚɬɚɪ ɛԝɥ ɫɵɪɵԕ

tgI 3 ɬɟԙɫɿɡɞɿɝɿ ɨɪɵɧɞɚɥɚɬɵɧ ɛɚɪɥɵԕ ɠɚԑɞɚɣɞɚ ɞɚ ɬɟɩɟ-ɬɟԙɞɿɤ ɤԛɣɞɟ ɛɨɥɚ
f

ɚɥɚɞɵ. Ɇɵɫɚɥɵ, tgI t 3 ɬɟԙɫɿɡɞɿɝɿ ɨɪɵɧɞɚɥɫɚ ɛɨɥɞɵ.
f

§4. Ⱦɨɦɚɥɚɭ ԛɣɤɟɥɿɫɿ
ȿɝɟɪ ɛɿɪ ɞɟɧɟɧɿ ɛɚɫԕɚ ɞɟɧɟɧɿԙ ɛɟɬɿɦɟɧ ԕɨɡԑɚɥɬԕɚɧ ɤɟɡɞɟ, ɠɚɧɚɫɚɬɵɧ
ɞɟɧɟɥɟɪ ɛɟɬɬɟɪɿɧɿԙ ԥɪ ɚɭɞɚɧɞɚɪɵ ɛɿɪ-ɛɿɪɿɦɟɧ ɛɿɪɬɿɧɞɟɩ ɠɚɧɚɫɵɩ ɨɬɵɪɚɬɵɧ
ɛɨɥɫɚ, ɛɚɫԕɚɲɚ ɚɣɬԕɚɧɞɚ, ɛɿɪ ɞɟɧɟɧɿ ɟɤɿɧɲɿ ɞɟɧɟɧɿԙ ɛɟɬɿɦɟɧ ɫɵɪԑɚɧɵɫɩɟɧ
ɧɟɦɟɫɟ ɫɵɪԑɚɧɵɫɫɵɡ ɞɨɦɚɥɚɬɫɚ, ɨɧɞɚ ԕɨɡԑɚɥɵɫԕɚ ɤɟɞɟɪɝɿ ɬɭɵɧɞɚɣɞɵ.
Ɉɫɵɥɚɣɲɚ ɬɭɵɧɞɚɣɬɵɧ ɤɟɞɟɪɝɿɧɿ ɞɨɦɚɥɚɭ Οɣɤɟɥɿɫɿ ɞɟɩ ɚɬɚɣɞɵ.

Ⱦɨɦɚɥɚɭ ԛɣɤɟɥɿɫɿɧɿԙ ɬɚɛɢԑɚɬɵ ɫɵɪԑɚɧɚɭ ԛɣɤɟɥɿɫɿ ɫɟɤɿɥɞɿ ɠɟɬɤɿɥɿɤɬɿ ɬԛɪɞɟ
ɡɟɪɬɬɟɥɦɟɝɟɧ, ɫɨɧɞɵԕɬɚɧ ɬɟɯɧɢɤɚɥɵԕ ɬԥɠɿɪɢɛɟɞɟ ɷɤɫɩɟɪɢɦɟɧɬ ɚɪԕɵɥɵ
ɬɚɛɵɥԑɚɧ ɠɭɵԕ ɲɚɦɚɥɚɪ ԕɨɥɞɚɧɵɥɚɞɵ.

ɋɚɥɦɚԑɵ Q , ɪɚɞɢɭɫɵ R ɞԧԙɝɟɥɟɤ ɤԧɥɞɟɧɟԙ ɠɚɡɵԕɬɵԕɬɵԙ ԛɫɬɿɧɞɟ ɬԝɪɫɵɧ

(53-ɫɭɪɟɬ).

53-ɫɭɪɟɬ

Ԧɡɿɧɿԙ ɫɚɥɦɚԑɵɧɵԙ ԥɫɟɪɿɧɟɧ, ɠɚɧɚɫɭ ɦɚԙɵɧɞɚ bCa ɨɣɵԑɵɦɟɧ
ɠɚɡɵԕɬɵԕԕɚ ɞԧԙɝɟɥɟɤ ɤɿɪɟɞɿ ɠԥɧɟ ԧɡɿ ɞɟ ɚɡɞɵ-ɤԧɩɬɿ ɠɚɩɵɪɵɥɚɞɵ. Ԧɡ

53