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Ȼԝɥ ɨɫɶɬɟɝi ɫɬɚɬɢɤɚɥɵԕ ɦɨɦɟɧɬ:
S x1 bh2 .
6
Ɉɫɵ ɩɚɪɚɝɪɚɮɬɚԑɵ 48 ԥ-ɮɨɪɦɭɥɚɫɵɧ ԕɨɥɞɚɧɚɦɵɡ, ɹԑɧɢ
bh2
yɨɪɬ S x1 1 6 h .
F 2 3
b h
ɋɨɧɵɦɟɧ, ԛɲɛԝɪɵɲɬɵԙ ɫɚɥɦɚԕ ɰɟɧɬɪi (O ɧԛɤɬɟɫɿ), ɬɚɛɚɧɵɧɚɧ h
3
ɲɚɦɚɫɵɧɞɚԑɵ ԕɚɲɵԕɬɵԕɬɚ ɠɚɬɚɞɵ (74-ɫɭɪɟɬ).
4. ɒɟԙɛɟɪ ɫɟɤɬɨɪɵ ɚɭɞɚɧɵɧɵԙ ɫɚɥɦɚԕ ɰɟɧɬɪɿ. ɋɟɤɬɨɪɞɵԙ ɫɢɦɦɟɬɪɢɹ ɨɫɿ
ɛɨɥɚɬɵɧɞɵԕɬɚɧ, ɨɧɵԙ ɫɚɥɦɚԕ ɰɟɧɬɪɿ ɨɫɵ ɈȺ ɨɫɿɧɿԙ ɛɨɣɵɧɞɚ ɠɚɬɚɞɵ (75-
ɫɭɪɟɬ).
75-ɫɭɪɟɬ
ɋɟɤɬɨɪɞɵԙ ɫɚɥɦɚԕ ɰɟɧɬɪɿ, ɲɟԙɛɟɪɞɿԙ ɰɟɧɬɪɿɧɟɧ ( O ɧԛɤɬɟɫɿ) Ɉɋ
ԕɚɲɵԕɬɵԕɬɚ ɠɚɬɫɵɧ, ɹԑɧɢ ɋ ɧԛɤɬɟɫɿ ɫɟɤɬɨɪɞɵԙ ɫɚɥɦɚԕ ɰɟɧɬɪɿ ɛɨɥɫɵɧ. Ɉɫɵ
ɚɪɚԕɚɲɵԕɬɵԕɬɵ ɬɚɛɭ ԛɲɿɧ, ɫɟɤɬɨɪɞɵԙ ɚɭɞɚɧɵɧ ɷɥɟɦɟɧɬɚɪ ɫɟɤɬɨɪɥɚɪԑɚ
(ɫɭɪɟɬɬɟ ɲɬɪɢɯɬɚɥԑɚɧ) ɛԧɥɿɩ, ɨɥɚɪɞɵ ԛɲɛԝɪɵɲ ɷɥɟɦɟɧɬɬɟɪ ɪɟɬɿɧɞɟ
ԕɚɪɚɫɬɵɪɚɣɵԕ. Ȼԝɥ ɤɟɡɞɟ ɷɥɟɦɟɧɬɚɪ ɫɟɤɬɨɪɥɚɪɞɵԙ ɫɚɥɦɚԕ ɰɟɧɬɪɿ O
ɧԛɤɬɟɫɿɧɟɧ 2 R ԕɚɲɵԕɬɵԕɬɚ ɛɨɥɚɞɵ, ɞɟɦɟɤ ɨɥɚɪ ɪɚɞɢɭɫɵ 2 R ɲɚɦɚɫɵɧɚ ɬɟԙ
3 3
ȼɄ ɞɨԑɚɫɵɧɵԙ ɛɨɣɵɧɞɚ ɠɚɬɚɞɵ. ɋɨɧɞɵԕɬɚɧ ɫɟɤɬɨɪ ɚɭɞɚɧɵɧɵԙ ɫɚɥɦɚԕ
ɰɟɧɬɪɿ ɛɿɪɬɟɤɬɿ ȼɄ ɞɨԑɚɫɵɧɵԙ ɫɚɥɦɚԕ ɰɟɧɬɪɿɧɟ ɞԥɥ ɤɟɥɟɞɿ, ɹԑɧɢ
2 Ɉɋ OM sinD .
3 D
OB R ɛɨɥԑɚɧɞɵԕɬɚɧ:
Ɉɋ 2R sinD .
3D
78
