Uy » Choraklik online testlar » Fizika choraklik » 7-sinf Fizika 4-chorak Fizika choraklik 7-sinf Fizika 4-chorak InfoMaster Aprel 26, 2021 1004 Ko'rishlar 0 SaqlashSaqlanganOlib tashlandi 1 0 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 25 Agar reaktiv samolyot dvigatelining tortish kuchi 90 k N bo’lsa, massasi 60 t bo’lgan samolyot tezlik olish vaqtida qanday tezlanish bilan harakatlanadi? A) 1 m/s² B) 0 C) 2 m/s² D) 0,5 m/s² 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) 3 B) 1 C) 2 D) 4 3 / 25 Odam liftda turibdi. Odamga ta’sir qiluvchi kuchlar: mg – og’irlik kuchi, N – tayanch reaksiya kuchi, Lift tekis xarakatlanganda kuchlar orasidagi munosabatni ko’rsating. Lift yuqoriga xarakatlana boshlaydi 1) mg > N 2) mg < N 3) mg = N 4) mg = 0; N = 0 A) 2 B) 4 C) 3 D) 1 4 / 25 Nyutonning 2-qonuni formulasini ko’rsating A) a = v² /R B) a = F / m C) a = v/t D) a = 2s/ t² 5 / 25 Massasi 60 kg bo’lgan jism tik yuqoriga 1 m /s2 tezlanish bilan ko’tarilayotgan bo’lsa, uning og’irligi qanday bo’ladi? A) 660 N B) 540 N C) 600 N D) 480 N 6 / 25 O’zaro ta’sirlashuvchi jismlarning bir-biriga ta’sir kuchlari bir to’g’ri chiziq bo’yicha yo’nalgan, moduli bo’yicha teng va yo’nalish bo’yicha qarama-qarshidir. Bu ....... A) Nyutonning 1 qonuni B) Nyutonning 2 qonuni C) Nyutonning 3 qonuni D) Nyutonning butun olam tortishish kuchi qonuni 7 / 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) 3 B) 4 C) 1 D) 2 8 / 25 Aylanma tekis harakatdagi chiziqli tezlik formulasini ko’rsating. 1) V=2¶R/T, 2) V=wR, 3)V=2¶RV A) 1,2,3 B) 2 C) 3 D) 1 9 / 25 Soatning sekund mili burchakli tezligini toping. (rad/s) A) π/30 B) π/2600 C) π/1800 D) π/10 10 / 25 Aylana bo’ylab tekis harakatda markazga intilma tezlanish formulasini ko’rsating. 1) a=v2/R, 2) a=v2/2R, 3) a=v/t A) 1,2 B) 2 C) 1 D) 3 11 / 25 Soatning vaqt mili burchakli tezligini toping. (rad/s) A) π/10 B) π/30 C) π/2600 D) π/1800 12 / 25 Velosiped g’ildiragining o’qidan eng uzoq nuqtasi 0,02 s davomida 20 km yo’lni bosib o’tdi. Velosipedning tezligini toping A) 0,36 km/soat B) 3,6 km/soat C) 36 km/soat D) 4 km/soat 13 / 25 25 m/s tezlik bilan yuqoriga tik otilgan jismning 2 s dan keyingi tezligi qancha bo’ladi? A) 5 m/s B) 15 m/s C) 20 m/s D) 10 m/s 14 / 25 Erkin tushayotgan jism ikkinchi sekundda qanday masofani (m) o’tadi? A) 25 B) 15 C) 35 D) 5 15 / 25 Tezlanish formulasi qanday ifodalanadi A) a = (v - v˳)/t B) p = m / v C) p = F / S D) S = at² / 2 16 / 25 Balkondan boshlang’ich tezliksiz tushib ketgan jism 1 s da yerga etib kelgan bo’lsa, u qanday balandlikdan (m) tushgan? A) 20 B) 5 C) 10 D) 15 17 / 25 Tezlanishning o’lchov birligini ko’rsating A) m²/s B) m/s C) s/ m² D) m/s² 18 / 25 Jismning harakat tenglamasi x = 2 – 3 t + 2 t2 formula bilan berilgan. Bu harakat uchun tezlik tenglamasini yozing A) υ = 4 t B) υ= 4 + 3 t C) υ= 4 - 3 t D) υ= - 3 + 4 t 19 / 25 Jism yerdan 35 m/s tezlik bilan tik yuqoriga otildi. U yerga necha sekunddan so’ng tushadi? A) 3 B) 9 C) 7 D) 5 20 / 25 Oyning yer atrofida aylanish tezligi nimaga teng A) 40 km/s B) 30 km/s C) 1 km/s D) 10 km/s 21 / 25 Raketa quyosh sistemasini tark etishi uchun u yerdan 16,7 km/s tezlik bilan uchirilishi kerak. Bu tezlikni nomi A) 1-kosmik tezlik B) 3-kosmik tezlik C) notekis tezlik D) 2-kosmik tezlik 22 / 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) 1 km/s C) 9,8 km/s D) 7,9 km/s 23 / 25 Agar jism biror balandlikdan ikki baravar katta tezlik bilan gorizantal otilsa, uning uchish vaqti qanday o’zgaradi A) o’zgarmaydi B) 4 martta ortadi C) 2 marta kamayadi D) 2 marta ortadi 24 / 25 Jismning yerga tortilish kuchi …… deb ataladi A) jism og’irligi B) bosim kuchi C) og’irlik kuchi D) reaksiya kuchi 25 / 25 Yerga tortilishi tufayli jismning tayanchga yoki osmaga tasr etadigan kuchi .......... deb ataladi A) jism og’irligi B) og’irlik kuchi C) bosim kuchi D) reaksiya kuchi 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