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M a s a la la m i j a d v a l tu z ib y e c h is h
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M a s a la la m i j a d v a l tu z ib y e c h is h
T ezlik, vaq t va m aso fan i h iso b lash g a d o ir m asalalam i y ech ish d a u la r o rasid ag i b o g ‘lanishlardan foydalaniladi: M aso fa = vaq t - tezlik, S = v t V aq t = m asofa: tezlik, t = S:v T ezlik = m aso fa : vaqt, v = S: t H iso b lash lam i bajarib, ja d v a ln i toM diring (Z aru r h ollarda soatni m in u tlard a ifodalang): M a s o f a 3 6 0 k m T e z lik ( k m /s o a t) 2 0 3 0 4 0 4 5 6 0 7 2 8 0 9 0 V a q t( s o a t) 18 5 H iso b lash lam i bajarib, ja d v a ln i to ld irin g (Z aru r h o llard a kilo- m etrni m etrlarg a aylantiring): M a s o f a 5 4 0 k m V a q t (s o a t) 5 6 9 10 12 15 18 2 0 T e z lik ( k m /s o a t) 108 6 0 H iso b lash lam i bajarib, ja d v a ln i to'ldiring: V a q t 1 s o a t 1 s o a t 2. 2 s o a t 3 s o a t 4 s o a t 5 s o a t 6 T e z lik ( k m /s o a t) 120 8 0 6 0 4 8 4 0 3 0 2 4 2 0 M a s o f a 299 T e zlik k am ay ish i b ilan m a ’lum m aso fan i (120 k m n i) b osib o ‘tish uchun k etad ig an v aq tn in g ortish ig a, am m o u la m in g k o ‘pay tm asi o ‘sha (1 2 0 km ) m aso fag a te n g b o lish ig a e ’ib o r bering. U c h r a s h m a y o ‘ n a l i s h d a g i h a r a k a t g a d o i r m a s a l a l a r Masala. N o zim a va N aim an in g uylari o rasid ag i m aso fa 550 m etr. U la r b ir vaq td a uylaridan ch iq ib b ir-b irig a q arab kela b o sh lad i. N o zim a 1 m in u td a 60 m etr, N aim a e sa 1 m in u td a 50 m etr y o ‘l y uradi. Q iz la r qan ch a vaqtdan keyin uchrashadi? Yechish. 1) q izlar 1 m in u td a bir-b irlarig a n echa m etr y aq in - lashadi? 60 m + 50 m = 110 m. 2 ) q iz la r qan ch a vaq td an k ey in u ch rash ad i? 550 :110 = 5 (m in). Javob: 5 m in u td an keyin. A g ar jis m la r (p o y ezd lar, v elo sip ed lar, odam lar...) b ir-b irig a q a ra b h arak atlan ay o tg an b o ‘lsa, u lam in g y aq in lash ish tezlig i ular tezlik larin in g y ig ‘in d isig a ten g bo'ladi. A va В sh ah arlar o rasid ag i m aso fa 4 8 0 km . Bu sh a h a rlard an b ir vaq td a b ir-b irig a q arab ikki av to m o b il y o ‘lga chiqdi. U lard an b irin ing tezligi 75 k m /soat, ik k in ch isin in g tezlig i esa 85 km /soat. a) u la r b ir-b irig a q an d ay te zlik b ilan y aq in lash ad i? 1 soatdan k ey in ular o rasid ag i m asofa n echa k ilo m etr boMadi? b) av to m o b illar n ech a so atd an keyin u chrashadi? 75 k m /so at ►_______________________ 85 k m /so at 4 8 0 km A va В q ish lo q lar orasidagi m aso fa 78 km . B u q ish lo q lard an b ir vaq td a b ir-b irig a qarab ikki v elo sip ed ch i yoMga chiqdi. B irinchi v elo sip ed ch in in g tezligi 12 km /soat. B ir so atd an k ey in ular orasidagi m aso ia 52 km boldi. E ddnchi v elo sip ed ch in in g tezligini toping. A va В sh ah arlar orasidagi m aso fa 6 5 0 km . B u sh ah arlard an b ir v aq td a b ir-b irig a q arab ikki p o y ezd y o 'lg a chiqdi. B irin ch i p o y ezd n in g tezligi 60 k m /soat, ikkinchi p o y ezd n ik i - 70 km /soat. a) p o y ezd lar n ech a so atd an so ‘ng u chrashadi? 6) u ch rash ish g a 1 soat q o lg an d a uia. orasidagi m aso fa nech a kilo m etr boMadi? Q a r a m a - q a r s h i y o ‘n a l i s h d a g i h a r a k a t g a d o i r m a s a l a l a r Masala. N aim a o ‘q iy d ig an m ak tab u la m in g uyidan o ‘ng tarafda, N aim an in g opasi N o z im a o ‘q iy d ig an litsey esa uydan ch ap tarafda. 300 O p a-sin g il b ir v aq td a uydan ch iq d i v a q aram a-q arsh i y o ‘n alish d a biri m ak tab g a, ikkinchisi litsey g a yol oldi. N aim an in g y u rish tezligi 50 m /m in , N o zim an ik i esa 60 m /m in. 5 m in u td an s o ‘ng u la r o rasi- dag i m aso fa n ech a m etr bo'ladi? Yechish. Download 7.79 Mb. Do'stlaringiz bilan baham: |
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