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3 . H a rak atn in g nisbiyligi
27 . Velosi p ed ch i tekis va t o lg ‘ri chiziqli h a ra k a t qilganda:
a) v elo sip ed g 'ild irag i b ilan ; b) velosi p ed ram asi b ilan ; d) Y er
bilan bikr bo g ‘langan san o q sistem alarid a velosi p ed gMldiragi
to lg ‘ini n u q tasin in g h a ra k a t trayektoriyasi q a n d a y boMadi?
28 . 11 - ra sm d a V e n erag a q o ‘n a d ig a n k osm ik stan siy a-
larining uchish sxem asi keltirilgan. U chish trayektoriyasi qaysi
san o q sistem asida k o ‘rsatilgan?
2 9 . M e tro n in g h a ra k a tla n a y o tg a n e s k a la to rid a tu rg a n
o d a m Y erga b o g ‘lan g an san o q sistem asida tin c h h o la td a b o ‘-
lishi m u m k in m i?
3 0 '. V elosi p e d c h in in g tezligi 36 k m /s o a t, u n in g h a ra k a -
tiga q arshi esayotgan sh a m o ln in g tezligi esa 4 m /s.V e lo sip e d -
ch ig a b o g d an g a n san o q sistem asida sh am o l tezligi q a n c h a ?
3 1 . T -1 5 0 zanjirli tra k to r 18 k m /s o a t m aksim al tezlik
b ila n h a ra k a tla n m o q d a . Z a n jirn in g y u q o ri va quyi q ism i
tezliklari v ektorlarining X va Y, o ‘qlarga proyeksiyasini toping.
X o ‘q Y er b ilan , A', o ‘q esa tra k to r b ilan b o g ‘lan g an . Ikkala
o ‘q h am tra k to rn in g h arak atlan ish i b o ‘y ic h a y o ‘n algan.
3 2 . M etro esk alato ri 0,75 m /s tezlik bilan h a ra k a tla n a d i.
Y o ‘lo v ch i s a n o q sis te m a s id a e s k a la to rn in g h a ra k a tla n is h
y o lnalish id a 0,25 m /s tezlik bilan yurib b o ra y o tg a n boMsa
(san o q sistem asi esk a la to r bilan bogM angan), u yerga n isbatan
20 m m asofaga k o ‘ch ish i u c h u n ketad ig an v aq tn i aniqlang.
3 3 . Ik k i p o y e z d b i r - b i r i g a t o m o n 72 k m / s o a t va
54 k m /so a t tezlik bilan h arak atlan m o q d a. B irinchi poyezddagi
kishi ikkinchi poyezd u n in g y o n id a n 14 s d av o m id a o ‘tg a n -
ligini an iq lad i. Ikkinchi p o y ez d n in g uzunligi q a n c h a ?
3 4 . Q a y iq n in g suvga n isb atan tezligi d a ry o o q im in in g
tezlig id an n m a rta k atta. Ikki m anzil orasidagi m aso fan i q a -
yiqda oq im g a qarshi suzib o ‘tish u c h u n o q im b o ly ich a o ‘tish -
ga q ara g a n d a n e c h a m a rta k o ‘p vaqt k etad i? M asalani n = 2
va n = \ \ b o ‘lgan h o lla r u c h u n yeching.
3 5 * . s = 240 m li m a so fa g a q a y iq d a a w a l o q im in in g
tezligi v, = 1 m /s boMgan d a ry o d a , keyin esa k o ‘ld a borib
1 B u v a b u n d a n k ey in g i m a s a la la rd a , a g a r a lo h id a a y tilm a g a n b o ‘l-
sa , Y e rg a b o g i a n g a n s a n o q s is te m a s id a g i te z lik k o ‘rs a tilg a n boM adi.
10
Q u y o sh
Y e r
V e n e ra
X, m
1200
800
400
o r b ita s i
o r b ita s i
Л
z
/
F
11- rasm .
0
20
4 0
60
80
t, s
12-
rasm .
qaytish lozim . Ikkala h o ld a h a m q ay iq n in g suvga n isbatan
tezligi u2 = 5 m /s . M asalani u m u m iy h o ld a y ec h ib , dary o d a
b o rib q ay tish u c h u n ketgan vaqt koMda borib qaytish u c h u n
k etg an v a q td a n d o im k o ‘p b o ‘lishini isbotlang. M a z k u r h o ld a
q ay iq n in g d a ry o d a h a rak atlan ish vaqti u n in g k o ‘lda h a ra k a t
lanish v a q tid a n q a n c h a k o lp?
36. M e tro esk alato ri h a ra k a tla n m a y tu rg an y o ‘lovchini
1 m in u t d avom ida yuqoriga olib chiqadi. H arakatlanm ayotgan
esk a la to rd a n y o ‘lovchi 3 m in u td a k o ‘tarilad i. YoNovchi h a ra
k a tla n a y o tg a n e sk a la to rd a y u q o rig a y u rib , q a n c h a v a q td a
k o ‘ta rila d i?
3 7 . T ezligi 16,5 m /s boMgan yuk a v to m o b ili o rq a sid a
tezligi 20 m /s b o ‘lgan yengil av to m o b il h a ra k a tla n m o q d a .
Q uvib o ‘ta b oshlash m o m e n tid a yengil avtom obil haydovchisi
qarshi to m o n d a n sh a h a rla ra ro q atn ay d ig a n avtobusni k o ‘rib
qoldi. Bu av to b u sn in g h a ra k a t tezligi 25 m /s. Q uvib о 4 a
b o sh lash d a yengil m ash in a yuk m a sh in asid an 15 m o rq a d a
b o ‘lib, quvib o ‘tish o x irid a yuk m ash in asid an 20 m o ld in d a
b o ‘lishi u c h u n av to b u sg ach a eng k am id a q a n c h a m asofada
yengil m a sh in a quvib o ‘tish n i boshlashi m u m k in ?
3 8 * . 12- ra sm d a Y erg a b o g ia n g a n s a n o q siste m a sid a
velosi p e d c h in in g h a rak atlan ish grafigi I va m o to tsik lch in in g
h a ra k a tla n ish grafigi II keltirilgan. V elosi p e d c h in in g m o to -
tsiklchiga b o g ia n g a n san o q sistem asidagi h arak at tenglam asini
y o zing va b u siste m ad a u n in g h a rak atlan ish grafigini chizing.
11
X, m
300
200
100
100
s
13- rasm .
1 4 - rasm .
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