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1 1 4 .
G ‘o i a n i yorib o i i n q ilin a y o tg a n d a b o lta g ‘o i a d a
siqilib qoldi. G ‘o i a n i yorish u c h u n q a ttiq ta y an c h g a g ‘o i a n i
urg a n m a ’q u lm i yoki b o lta n in g o rq a sin i u rg a n m a ’q u lm i?
U rish v aq tin i b ir xil d eb hisoblang.
1 1 5 1. M assasi 100 t b o i g a n m a n y o v r te p lo v o z i tin c h
tu rg a n vag o n n i tu rtib y u b o rd i. 0 ‘z aro t a ’sirlashish vaq tid a
vago n n in g tezlan ish i tep lo v o zn in g tezla n ish id an m o d u l b o ‘yi-
c h a 5 m a rta k a tta b o ig a n . V ago n n in g m assasi q anday?
11 6 . Ikk ita p o i a t s h a m in g t o ‘q n ash ish vaqtidagi te z la
n is h la rin i ta q q o s la n g . B irin c h i s h a m in g ra d iu si ik k in c h i
sh a m in g ra d iu sid an 2 m a rta k atta. M asalan in g javobi sh arla r-
ning b o s h la n g ic h tezliklariga b o g iiq m i?
11 7 . Bir s h a r p o i a t d a n , ik k in c h i s h a r q o ‘rg‘o s h in d a n
yasalgan b o ‘lib, radiuslari b ir xil. Bu sh a rla rn in g o ‘z a ro ta ’-
sirlashuv vaqtidagi te z la n ish la rin in g m o d u lla rin i taqqoslang.
1 1 8 . G o r iz o n ta l te k is lik d a h a r a k a tla n a y o tg a n ik k ita
a r a v a c h a n in g t o ‘q n a s h is h id a b irin c h i a r a v a c h a n in g tezlik
v e k to rin in g X o ‘q q a proyeksiyasi 3 d a n 1 m /s g ac h a, ikkinchi
aravachaning tezlik vektorining o ‘sha o ‘qqa proyeksiyasi -1 dan
+ 1 m / s g a c h a o ‘z g a rd i. X o ‘q y e rg a bogM angan boM ib,
g o riz o n ta l jo y lash g an va u n in g m u sb at y o ‘n alishi b irin ch i
ara v a c h a n in g boshlangM ch tezligi vektori y o ‘nalishiga m os
tushadi. A rav ach alarn in g o ‘zaro ta ’sirlashguncha va ta ’sirlash-
g a n d a n keyingi h a r a k a tla rin i tav siflan g . A ra v a c h a la rn in g
m assalarini taqqoslang.
1 1 9 . M assalari 400 va 600 g boMgan ik k ita jis m b ir-
biriga q a ra m a -q a rsh i h a ra k a tla n ib kelib to ‘q n ash d i va sh u n -
d a n keyin to ‘x tab qoldi. A gar b irin ch i jism 3 m /s tezlik d a
h arak atlan g a n boMsa, ik k in ch i jism n in g tezligi q a n d a y boM
gan ?
1 M a z k u r p a r a g r a f d a g i b u v a b u n d a n k e y in g i m a s a la l a r d a g a p
o ‘r t a c h a te z la n is h t o 'g 'r i s i d a b o r a d i , c h u n k i z a r b v a q tid a g i h a r a k a t
te k is te z l a n u v c h a n b o M m ay d i.
23
120. M assasi 60 t boMgan vagon 0 ,2 m /s tezlik bilan
q o ‘zg‘alm as p latfo rm a g a y a q in la sh ib k elib , b u fe rlari bilan
u rilg an d a p la tfo rm a 0 ,4 m /s tezlik oladi. A gar vagon u ril-
g a n id a n keyin u n in g tezligi 0 ,2 m /s g a c h a kam aygan b o ‘lsa,
p la tfo rm a n in g m assasi q anday?
121. F u tb o lc h i t o ‘p n i te p g a n d a n k ey in t o ‘p y u q o rig a
q a ra b vertikal u c h ib b o rm o q d a:
a ) te p ish p ay tid a;
b) t o ‘p y u q o rig a k o ‘ta rila y o tg a n v aq td a;
d) t o ‘p p astg a tu sh a y o tg a n d a ;
e) yerga u rila y o tg a n d a t o ‘pga t a ’sir q ilu v ch i k u ch larn i
k o ‘rsating va u la m i taqqoslang.
122. Q uyidagi h o llard a shareh ag a ta ’sir qiluvchi k u ch lam i
k o ‘rsating va taqqoslang:
a) sh a rc h a g o rizo n ta l sto ld a tu rg an d a ;
b) q o ‘ld an tu rtk i olg an d a;
d) sto ld a d u m alay o tg an d a .
123. O d a m liftda turibdi. Q uyidagi h o llard a odam g a t a ’sir
qiluvchi k u ch larn i k o ‘rsating va taqqoslang:
a) lift tin c h turibdi;
b) lift y u qoriga h a ra k a tla n a boshladi;
d) lift tekis h arak atlan y a p ti;
e) lift t o ‘x tash d an o ld in sekin lash y ap ti.
124. a ) av to m o b il g o rizo n ta l y o ‘lda to ‘x tab tu rg an d a ;
b) av to m o b il jo y id a n q o ‘zg‘alay o tg a n d a;
d ) a v to m o b il g o r iz o n ta l y o ‘ld a t o ‘g ‘ri c h iz iq li te k is
h arak at q ilay o tg an d a;
e ) a v to m o b il te k is h a r a k a tla n ib , q a v a riq k o ‘p rik n in g
o ‘rta sid a n o ‘tay o tg an d a ;
0 avtom obil tekis h a ra k a tla n ib b u rilay o tg an d a ;
g) avto m o b il g o rizo n ta l y o ‘ld a to rm o z la n a y o tg a n d a unga
t a ’sir qiluvchi k u ch larn i k o ‘rsating va taqqoslang.
125. 24- ra sm d a sam o ly o tg a t a ’sir q ilu v ch i k u c h la r va
tezlik v ek to rin in g b iro r p aytdagi y o ‘n alishi k o ‘rsatilgan ( F —
to rtish k u c h i, Fq — r o ‘p a ra q a rsh ilik k u c h i, FQ — o g ‘irlik
k u c h i, Fk - koM arish k u ch i): a) Fo = Fq, F = Ғ ; b) Ғ = Fq,
F> Fq; 6) Fo > F q, F = F ; e ) F < F , F = F q b o ig a n h o llard a
sam o ly o t q a n d a y h ara k a tla n a d i?
24
F,
Ғ0
2 4 - rasm .
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