7-sinf Fizika 4-chorak Aprel 26, 2021Aprel 26, 2021 da chop etilgan InfoMaster tomonidan 7-sinf Fizika 4-chorak ga fikr bildirilmagan. 1 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 25 Gorizontal tekislikda yotgan 6 kg massali jism qanday kuch ta’sirida 1s da 2 m/s tezlikka erishadi? Jismga ta’sir etayotgan ishqalanish kuchi 4 N ga teng deb xisoblang A) 4 B) 8 C) 16 D) 12 2 / 25 60 N kuch jismga 0,8 m/s2 tezlanish beradi. Qanday kuch bu jismga 2 m/s2 tezlanish beradi? A) 150 N B) 15 N C) 24 N D) 240 N 3 / 25 Tennischi 100 kg massali koptokni 250 N kuch bilan urganda koptok 50 m/s tezlik oldi. Zarb necha sekund davom etgan? A) 100 B) 10 C) 50 D) 20 4 / 25 1000 mN necha N? A) 1 B) 400 C) 70 D) 10 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) 480 N B) 660 N C) 540 N D) 600 N 6 / 25 Odam liftda turibdi. Odamga ta’sir qiluvchi kuchlar: mg – og’irlik kuchi, N – tayanch reaksiya kuchi, Lift yuqorida to’xtashdan oldin sekinlashganda kuchlar orasidagi munosabatni ko’rsating. Lift yuqorida to’xtashdan oldin sekinlashyapti 1) mg > N 2) mg < N 3) mg = N 4) mg = 0; N = 0 A) 1 B) 2 C) 3 D) 4 7 / 25 m/s2 tezlanish bilan to’g’ri chiziq bo’ylab harakatlanayotgan jismning holatidan boshlab birinchi sekunda qanday masofani (m) o’tadi? A) 8 B) 6 C) 7 D) 4 8 / 25 Erkin tushib harakat qilayotgan jismning tezligi har sekundda qanchaga o’zgaradi A) 5 m/s B) 15 m/s C) o’zgarmaydi D) 10 m/s 9 / 25 Erkin tushish deb qaysi harakatga aytiladi A) jismga hech qanday kuch ta’sir qilmagandagi harakatiga B) xar qanday harakatga C) qo’ldan qo’yib yuborgan jism harakatiga D) jismning havosiz joyda faqat yerning tortish ta’sridagi harakatiga 10 / 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= - 3 + 4 t D) υ= 4 - 3 t 11 / 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) 1,3 B) 3,4 C) 2,4 D) 1,2 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) 36 km/soat B) 3,6 km/soat C) 4 km/soat D) 0,36 km/soat 13 / 25 Aylanma tekis harakatda chiziqli tezlik bilan burchak tezlik orasidagi munosabat formulasini ko’rsating A) w=2¶/T B) V=wR C) w=4/t D) w=2¶V 14 / 25 Soatning minut mili burchakli tezligini toping A) π/30 B) π/1800 C) π/10 D) π/2600 15 / 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) 3 C) 2 D) 1 16 / 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) 4 rad B) 5 rad C) 3 rad D) 1,05 rad 17 / 25 Agar moddiy nuqta aylana bo’ylab teng vaqtlar orasida teng yollarni bosib o’tsa, bunday harakat ....... harakat deyiladi A) aylanma o’zgaruvchan B) tekis aylanma tezlik C) tekis D) notekis 18 / 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) 5 C) 2 D) 3 19 / 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) 1 B) 2 C) 100 D) 10 20 / 25 Aylanma tekis harakatga chiziqli tezlik va burchakli tezlik bog’lanish formulasini ko’rsating A) ω=2p/T B) ω=2p υ C) υ=ωR D) υ=2pR/T 21 / 25 Markazga intilma tezlanish formulasi qaysi ifodada to'g'ri ko’rsatilgan? A) a=v/t B) a=F/m C) a=(v-v˳)/t D) a=v²/R 22 / 25 Lift a A) P=m(g+a) B) P=m(g-a) C) (P=mg) D) P=m(a-g) 23 / 25 Erkin tushish tezlanishi jismning yer sirtidan balandligiga bog’likligi qaysi formulada ko’rsatilgan A) g/m² B) f/m C) g=GM/(R+h)² D) m/s² 24 / 25 Yer uchun ikkinchi kosmik tezlik qiymatini ko’rsating A) 16,7 km/s B) 7,9 m/s C) 11,2 km/s D) 7,9 km/s 25 / 25 Agar jism biror balandlikdan ikki baravar katta tezlik bilan gorizantal otilsa, uning uchish uzoqligi qanday o’zgaradi A) 2 marta ortadi B) 4 martta ortadi C) 2 marta kamayadi D) o’zgarmaydi 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 tomonidan Wordpress Quiz plugin Fizika choraklik
