Page 270 - index

( P1 m1g , P2 m2 g , P3 m3 g ) ɨɫɵ ɨɪɵɧ ɚɭɵɫɬɵɪɭԑɚ ɫԥɣɤɟɫ ɜɢɪɬɭɚɥɞɵ

ɠԝɦɵɫɬɚɪɵ: G A P2G s2 P3G s2 (m2 m3 )gG s2 . ɋɨɧɞɵԕɬɚɧ:

Q2 G A2 (m2 m3 ) ˜ g .
G s2

ɀԛɣɟɧɿԙ ɤɢɧɟɬɢɤɚɥɵԕ ɷɧɟɪɝɢɹɫɵ:

T m1v12 m2 v 22 m3v32 .
2 2 2

Ȼԝɥ ɬɟԙɞɿɤɬɟɝɿ v1 , v2 , v3 – ɠԛɤɬɟɪɞɿԙ ɚɛɫɨɥɸɬ ɠɵɥɞɚɦɞɵԕɬɚɪɵ, ɛԝɥɚɪɞɵ
ɠɚɥɩɵɥɚɧԑɚɧ ɠɵɥɞɚɦɞɵԕɬɚɪ ɚɪԕɵɥɵ ԧɪɧɟɤɬɟɫɟɤ:

x xx xx

v1 s1 , v2 s2 s1 , v2 s2 s1 .

ɀԛɣɟɧɿԙ ɤɢɧɟɬɢɤɚɥɵԕ ɷɧɟɪɝɢɹɫɵɧɚ ɠɚɥɩɵɥɚɧԑɚɧ ɤɨɨɪɞɢɧɚɬɬɚɪ
ɤɿɪɦɟɝɟɧɞɿɤɬɟɧ:

wT 0 ɠԥɧɟ wT 0.
w s1 ws2

ɋɨɧɞɵԕɬɚɧ wT ɠԥɧɟ wT ɲɚɦɚɥɚɪɵɧ ɬɚɛɚɣɵԕ:

˜ x
w s1 w s2

dT xx

x (m1 m2 m3 ) ˜ s1 (m2 m3 ) ˜ s2 ,
G s1

dT xx

x (m2 m3 ) ˜ s1 (m2 m3 ) ˜ s2 .
G s2

ɀɚɥɩɵɥɚɧԑɚɧ ɤԛɲɬɟɪɞɿ ɠԥɧɟ ɤɢɧɟɬɢɤɚɥɵԕ ɷɧɟɪɝɢɹɧɵԙ ɬɭɵɧɞɵɫɵɧ
Ʌɚɝɪɚɧɠ ɬɟԙɞɿɝɿɧɟ ԕɨɹɦɵɡ, ɫɨɧɞɚ:

xx xx

(m1 m2 m3 ) ˜ s1 (m2 m3 ) ˜ s2 (m1 m2 m3 ) ˜ g,

xx xx

(m2 m3 ) ˜ s1 (m2 m3 ) ˜ s2 (m2 m3 )g.
Ɉɫɵ ɬɟԙɞɟɭɥɟɪɞɟɧ:

xx m1 (m2 m3 ) 4m2m3 g,
m1 (m2 m3 ) 4m2m3
s1

xx 2m1 (m2 m3 ) g.

s2 m1 (m2 m3 ) 4m2m3

xx xx

Ɍɟԙɞɟɭɥɟɪɞɟɝɿ: s1 – M1 ɠԛɝɿɧɿԙ ɚɛɫɨɥɸɬ ԛɞɟɭɿɧɿԙ ɚɥɝɟɛɪɚɥɵԕ ɲɚɦɚɫɵ; s2
– M1 ɠԥɧɟ M 3 ɠԛɤɬɟɪɿɧɿԙ II ɲɵԑɵɪԑɚ ԕɚɪɚɫɬɵ ɚɛɫɨɥɸɬ ԛɞɟɭɥɟɪɿɧɿԙ
ɚɥɝɟɛɪɚɥɵԕ ɲɚɦɚɫɵ.

ɋɨɧɵɦɟɧ, ɬɚɛɵɥԑɚɧ ɟɤɿ ԛɞɟɭ ɞɟ ɬԝɪɚԕɬɵ ɛɨɥɵɩ ɲɵԕɬɵ, ɞɟɦɟɤ ɠԛɤɬɟɪ
ԕɨɡԑɚɥɵɫɵ ɬɟԙԛɞɟɭɥɿ ɛɨɥɵɩ ɬɚɛɵɥɚɞɵ. ȿɝɟɪ ɠԛɤɬɟɪɞɿԙ ɛɚɫɬɚɩԕɵ
ɠɵɥɞɚɦɞɵԕɬɚɪɵ ɧԧɥ ɛɨɥɵɩ, ɚɥ ɫɨɧɚɧ ɫɨԙ:

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