Uy » Choraklik online testlar » Fizika choraklik » 7-sinf Fizika 4-chorak Fizika choraklik 7-sinf Fizika 4-chorak InfoMaster Aprel 26, 2021 1017 Ko'rishlar 0 SaqlashSaqlanganOlib tashlandi 1 0 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 25 1 m/s2 tezlanish bilan tushayotgan liftdagi 20 kg massali bolaning og’irligi qancha? A) 200 N B) 190 N C) 170 N D) 180 N 2 / 25 Odam liftda turibdi. Odamga ta’sir qiluvchi kuchlar: mg – og’irlik kuchi, N – tayanch reaksiya kuchi, Lift tinch turganda kuchlar orasidagi munosabatni ko’rsating 1) mg > N 2) mg < N 3) mg = N 4) mg = 0; N = 0 A) 4 B) 1 C) 2 D) 3 3 / 25 Odam liftda turibdi. Odamga ta’sir qiluvchi kuchlar: mg – og’irlik kuchi, N – tayanch reaksiya kuchi, Lift pastda to’xtashdan oldin sekinlashganda kuchlar orasidagi munosabatni ko’rsating. Lift pastda to’xtashdan oldin sekinlashyapti 1) mg > N 2) mg < N 3) mg = N 4) mg = 0; N = 0 A) 2 B) 1 C) 3 D) 4 4 / 25 Massasi m = 10 kg bo’lgan jismga 25 N kuch ta’sir qilmoqda. Shu kuch ta’sirida u qanday tezlanish bilan harakat qiladi? A) 1 m / s² B) 3 m / s² C) 6 m / s ² D) 2,5 m / s² 5 / 25 Massasi 0,5 kg bo’lgan koptokka 0,02 s davomida zarb berilgandan keyin u 10 m / s tezlik oladi. Zarbning o’rtacha kuchini toping A) 500 N B) 1000 N C) 200 N D) 250 N 6 / 25 1000 mN necha N? A) 1 B) 400 C) 70 D) 10 7 / 25 Yer sirtidagi jism yerga F kuch bilan tortilmoqda. Yer sirtidan h=2R balandlikka ko’tarilsa yerga qanday kuch bilan tortiladi? R-Ep radus A) F/9 B) F/2 C) F/16 D) F/4 8 / 25 Oyda erkin tushish tezlanishi nimaga teng? (m/s2) A) 7,9 B) 1 C) 1,6 D) 9,8 9 / 25 Yerning tortishish kuchi ta’sirida jismning yer atrofida aylana bo’ylab, harakatlanishida erishtiradigan tezlik ………. deyiladi A) 1-kosmik tezlik B) 2-kosmik tezlik C) notekis tezlik D) 3-kosmik tezlik 10 / 25 Yerga tortilishi tufayli jismning tayanchga yoki osmaga tasr etadigan kuchi .......... deb ataladi A) og’irlik kuchi B) bosim kuchi C) jism og’irligi D) reaksiya kuchi 11 / 25 Oyning yer atrofida harakatlanish tezligini toping. Yer massasi 6*10 24 kg, yer bilan oy orasidagi masofa 400 000 km gravitatsion doimiylik Nm2/kg2 A) 11,2 km/s B) 9,8 km/s C) 1 km/s D) 7,9 km/s 12 / 25 Gravitatsion doimiy xalqaro birliklar sistemasida qanday birlik bilan aniqlanadi A) N*kg B) N/m² C) m³/kg*s² D) kg*m/S² 13 / 25 Lift a A) P=m(g+a) B) (P=mg) C) P=m(g-a) D) P=m(a-g) 14 / 25 Ko’tarilish balandligi 4 marta ortishi uchun yuqoriga otilgan jismning boshlang’ich tezligini necha marta oshirish lozim A) 45 martta B) 60 martta C) 55 martta D) 50 martta 15 / 25 Jism 20 m/s tezlik bilan tik yuqoriga otildi. Jism necha sekund eng baland nuqtasigacha ko’tariladi? g = 10 m/s2 A) 3 c B) 4 c C) 2 c D) 1 c 16 / 25 Jism tezlik proporsiyasining vaqtga bog’lanish v = 3+2t (m/s) ko’rinishga ega. Ko’chish proyeksiyasining vaqtga bog’lanishi qanday? A) S = 3t + 2 t² B) S = 3t + 1 t² C) S = 2t + 3 ² D) S = 2t² 17 / 25 Tekis tezlanuvchan harakatda tezlik va tezlanish ishoralarning munosabatini ko’rsating. 1) υ0 > 0, a>0 2) υ0 > 0, a<0 3) υ0 < 0, a<0 4) υ0<0, a>0 A) 2,4 B) 1,2 C) 3,4 D) 1,3 18 / 25 Tekis tezlanuvchan harakat qilayotgan “Matiz” 10 s davomida tezligini 54 km / soat dan 100 km / soat ga oshirdi. «Matiz»ning tezlanishini toping A) 3 m/s² B) 2,5 m/s² C) 15 m/s² D) 13 m/s² 19 / 25 Aylanma tekis harakatda tezlanish qanday yo’nalgan? A) urinma bo’ylab B) xar xil yo’nalgan bo’lishi mumkin C) radius bo’ylab markazdan D) radius bo’ylab markazga 20 / 25 Avtomabil 90 km/soat tezlik bilan tekis harakatlanmoqda. Agar avtomobil g’ildiragining raidusi 35 sm bo’lsa, g’ildirak markazidan shuncha masofa uzoqlikdagi nuqtasining markaziga intilma tezlanishini toping. (m/s2) A) 50 B) 1786 C) 2000 D) 2800 21 / 25 0,1 s davomida g’ildirak 1 chapga buriladi. Uning o’qidan 5sm uzoqlikdagi nuqtasining chiziqli tezligini toping A) 5 m/s B) 10m/s C) 0,5 m/s D) 50m/s 22 / 25 Uzunligi 25 sm bo’lgan ipga bog’langan sharcha 5 m/s chiziqli tezlik bilan aylanmoqda. Sharning markaziga intilma tezlanishini toping. (m/s2) A) 2 B) 10 C) 1 D) 100 23 / 25 Soatning 30 mm uzunlikdagi minut uchi 10 minutda 31,4 mm uzunlikdagi yo’lni bosib o’tdi. Minut mili uchining burchak tezligini toping. A) 0,017 rad/s B) 1,7 rad/s C) 0,0017 rad/s D) 0,17 rad/s 24 / 25 Velosiped g’ildiragining o’qidan eng uzoq nuqtasi 0,02 s davomida 20 km yo’lni bosib o’tdi. Velosipedning tezligini toping A) 36 km/soat B) 0,36 km/soat C) 3,6 km/soat D) 4 km/soat 25 / 25 Soatning vaqt mili burchakli tezligini toping. (rad/s) A) π/2600 B) π/30 C) π/1800 D) π/10 0% Testni qayta ishga tushiring Baholash mezoni 86%-100% 5 baho 71%-85% 4 baho 56%-70% 3 baho 55% va kamiga 2 baho Fikr-mulohaza yuboring Author: InfoMaster Foydali bo'lsa mamnunmiz