232
holatda OUM balandligi;
h
1
-
pirovard holatda OUM balandligi (S.-
M.A.Alekperov bo‗yicha)
R
1
- R
sin
W
bo‗lgani bois (bu erda
W
burchak tananing vertikal
holatdan og‗ish darajasi hisoblanadi), og‗irlik kuchining aylanish momenti
M
p
gimnast tanasi og‗irligi
R
ning vertikal holatga nisbatan gimnast tanasining
og‗ish darajasini tavsiflovchi burchak sinusi sin
W
va radius
R
ga ko‗paytmasiga
teng:
M
R
= P · sinW· R.
Aylanish momentining qiymati tana OUM aylanish radiusi (OS) va
burchak kattaligi
(W)
ga qarab o‗zgaradi. Eng katta qiymatga u tananing
gorizontal holatida ega bo‗ladi
(M
R
= R
·
R),
chunki sin 90° = 1; tana vertikal
holatga o‗tgach esa u nolga teng bo‗ladi (sin O
0
= 0).
Mashqning ikkinchi qismida tana vertikal chiziqdan o‗tganidan keyin
kuchning harakat yo‗nalishi
R
1
qarama-qarshi tomonga o‗zgaradi: u soat mili
yo‗nalishida harakat qiladi va, binobarin, gimnast tanasining gorizontal holatida
eng katta qiymat bilan manfiy belgiga ega bo‗ladi. So‗ngra tana snaryad o‗zra
(katta aylanishni bajarishda) vertikal holatga yaqinlashishiga qarab uning
qiymati nolgacha kamayadi va gorizontal holatga yaqinlashishga qarab yana
maksimumgacha, lekin endi musbat belgi bilan o‗sa boshlaydi, chunki uning
harakati soat mili harakatiga qarshi yo‗nalishga qaratilgan bo‗ladi.
Og‗irlik kuchining
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