7-sinf Fizika 4-chorak Aprel 26, 2021Aprel 26, 2021 da chop etilgan InfoMaster tomonidan 7-sinf Fizika 4-chorak ga fikr bildirilmagan. 6 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 25 Yerning tortishish kuchi ta’sirida jismning yer atrofida aylana bo’ylab, harakatlanishida erishtiradigan tezlik ………. deyiladi A) 1-kosmik tezlik B) 3-kosmik tezlik C) 2-kosmik tezlik D) notekis tezlik 2 / 25 Gravitatsion doimiy xalqaro birliklar sistemasida qanday birlik bilan aniqlanadi A) N/m² B) m³/kg*s² C) N*kg D) kg*m/S² 3 / 25 Lift a A) P=m(g-a) B) P=m(a-g) C) P=m(g+a) D) (P=mg) 4 / 25 Liftdagi odam o’ta yuklanishga duch kelishi mumkinmi? A) Xa agar lift tezlanish bilan yuqoriga ko’tarilsa B) Xa lift yuqoriga ko’tarilganda C) Yo’q D) Xa lift tezlanish bilan pastga tushganda 5 / 25 Yer uchun ikkinchi kosmik tezlik qiymatini ko’rsating A) 7,9 km/s B) 16,7 km/s C) 11,2 km/s D) 7,9 m/s 6 / 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/2 B) F/16 C) F/4 D) F/9 7 / 25 Yer sirtidagi h=2R balandlikda erkin tushish tezlanishi nimaga teng A) g/9 B) g/4 C) g D) g/2 8 / 25 Faqat butun olam tortishish kuchlari ta’sirida erkin harakat qilayotgan xar qanday jism ......... xolatida bo’ladi A) vaznsizlik B) o’ta yuklanish C) turg’un muvozanat D) turg’unmas muvozanat 9 / 25 Suv quyilgan idish lift kabinasiga joylashtirilgan. Agar lift tezlanish bilan yuqoriga harakatlansa, suvning idish tubiga bosimi qanday o’zgaradi? A) Ortishi xam, kamayishi xam mumkin B) Ortadi C) O’zgarmaydi D) Kamayadi 10 / 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) 0 B) 1 m/s² C) 0,5 m/s² D) 2 m/s² 11 / 25 Massasi 4 kg bo’lgan jism biror kuch ta’siri ostida 2 m/s2 tezlanish oldi. Shunday kuch ta’siri ostida massasi 10 kg bo’lgan jism qanday tezlanish oladi? A) 0 B) 2 m/s² C) 0,8 m/s² D) 1 m/s² 12 / 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) 3 C) 2 D) 1 13 / 25 Nyutonning 3 qonuni formulasi qaysi ifodada to’g’ri ko’rsatilgan? A) F = mv²/ R B) F1 =- F2 C) F = mg D) F = - k x 14 / 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) 2,5 m / s² C) 6 m / s ² D) 3 m / s² 15 / 25 m/s2 tezlanish bilan to’g’ri chiziq bo’ylab harakatlanayotgan jismning holatidan boshlab birinchi sekunda qanday masofani (m) o’tadi? A) 6 B) 4 C) 7 D) 8 16 / 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) 3,4 B) 2,4 C) 1,2 D) 1,3 17 / 25 Erkin tushib harakat qilayotgan jismning tezligi har sekundda qanchaga o’zgaradi A) 10 m/s B) 15 m/s C) o’zgarmaydi D) 5 m/s 18 / 25 Velosiped g’ildiragining o’qidan eng uzoq nuqtasi 0,02 s davomida 20 km yo’lni bosib o’tdi. Velosipedning tezligini toping A) 4 km/soat B) 36 km/soat C) 3,6 km/soat D) 0,36 km/soat 19 / 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) 1 C) 3 D) 2 20 / 25 Velosiped raridusi 25 m bo’lgan aylanma yo’lda 10 m/s tezlik bilan tekis harakatlanmoqda. Uning markazga intilma tezlanishini toping. (m/s²) A) 4 B) 3 C) 2 D) 5 21 / 25 Soatning sekund mili burchakli tezligini toping. (rad/s) A) π/30 B) π/2600 C) π/1800 D) π/10 22 / 25 Soatning 30 mm uzunlikdagi minut uchi 10 minutda 31,4 mm uzunlikdagi yo’lni bosib o’tdi. Minut mili uchining burilish burchagini toping. (rad) A) 1,05 rad B) 5 rad C) 4 rad D) 3 rad 23 / 25 Soatning vaqt mili burchakli tezligini toping. (rad/s) A) π/2600 B) π/1800 C) π/30 D) π/10 24 / 25 Aylanma tekis harakatga chiziqli tezlik va burchakli tezlik bog’lanish formulasini ko’rsating A) ω=2p/T B) ω=2p υ C) υ=2pR/T D) υ=ωR 25 / 25 0,1 s davomida g’ildirak 1 chapga buriladi. Uning o’qidan 5sm uzoqlikdagi nuqtasining chiziqli tezligini toping A) 0,5 m/s B) 5 m/s C) 10m/s D) 50m/s 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 Fizika choraklik