4 6
-masala. B ikirlik ko effitsiy en ti c= 4000 N / m
t n j и t
b o ‘lg a n p r u jin a g a o g ‘irlig i
G= 20 N b o ‘lg a n
M
jism osilg an (1 4 7 -ra sm ). M o d d iy
n u q ta deb q a ra -
lu v c h i b u jis m g a d av riy ra v is h d a o ‘z g a ru v c h i
S = 111 J i s m p t N u y g ‘o tu v c h i
k u c h va te z lik -
n in g b irin c h i d a ra ja s ig a p ro p o rs io n a l b o ‘lg an
R = 5
4 m cx N q a rs h ilik k u c h i t a ’sir
q ila d i ( m —
jis m m assa si). U y g ‘o tu v c h i
k u c h n in g d o ira v iy
ta k ro rlig i
p q a n d a y b o ‘lg a n d a
m ajb u riy te b ra n is h
am plitudasi A eng k a tta qiym atga erishadi?
Yechish. Sanoq sistem asin in g b o shi qilib jis m
n in g s ta tik m u v o z a n a t h o la tin i o la m iz .
Ox o ‘q n i
vertikal b o ‘yicha h arakat y o ‘nalishi to m o n y o ‘n a lti-
ram iz.
M n u q ta g a
G o g ‘irlik k u c h i,
F q a y ta r u v c h i
kuch,
R qarshilik kuchi h am d a S uyg‘otuvchi kuch
t a ’sir qiladi.
M nuqtaning harakati differensial ten g lam asini tuzam iz:
mx =
G - c ( x + / s t ) - 5
yfmcx + 11 7,72sin
p t .
Bu ifodaning
h a r ikki to m o n in i m ga b o ‘lib,
G=cfst ni e ’tib o rg a
olsak, u
1 1 7 , 7 2
