Fb £ м
л =
Ral — F b = О , b u n d a n
Ra = - j - Fo 2
X
=
~ R b ( +
F a = О , b u ndan
Л й = - y -
E p y u ra la m i q u ris h d a n o ld in to p ilg a n re a k s iy a la m i te k s h ira m iz .
B u n in g u ch u n ^ Г У = 0 te n g la m a sid a n fo y d a la n a m iz :
Z Fb Fa F ( a + b )
7 = Д а - Ғ + Л 6 = 0,
yoki — + — - F = 0;
— ^-------- * - F = 0 .
У I I I M u v o z a n a t te n g la m a s i q a n o a tla n tirild i. D e m a k, re a ksiya k u c h la ri t o ‘ g ‘ ri
to p ilg a n .
Eguvchi m om ent va k o ‘ndalang kuch epyuralariga d o ir tenglam alam i tuzish
uchun balkani uchastkalarga boMib chiqam iz va har b ir uchastka uchun tegishli
tenglamani tuzam iz. Ik k i k u c h oraligMdagi masofa
uchastka deb ataladi. Rama-
Iarda tugundan kuchgacha boMgan masofa ham alohida uchastka tariqasida qa
raladi. B iz hisoblayotgan balka ik k i uchastkadan iborat: Ra dan F gacha boMgan
A C masofa 1-u ch a stka ; F dan
Rb gacha boMgan B C masofa 2-uchastka.
A v v a l M e p y u ra s in i q u ra m iz . A ta y a n c h id a g i ix tiy o r iy x , m asofada b a l
kani kesam iz. Shu k e s im n in g o g M rlik m a rka zig a nisb a ta n m o m e n tla r te n g
la m a sin i tu z a m iz . M a M u m k i, te n g la m a k e s im n in g b ir to m o n id a y o tg a n k u c h
la r u ch u n tu z ila d i. B iz n in g m is o ld a ke sim d a n chapda b irg in a R a k u c h i, o ‘ n g
to m o n d a esa F v a R b k u c h la ri b o r. Is h n i y e n g illa s h tiris h u c h u n ch a p to
m o n g a te n g la m a tu z a m iz :
w
n
