Uy » Choraklik online testlar » Fizika choraklik » 7-sinf Fizika 4-chorak Fizika choraklik 7-sinf Fizika 4-chorak InfoMaster Aprel 26, 2021 1073 Ko'rishlar 0 SaqlashSaqlanganOlib tashlandi 1 0 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 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) 3 m / s² B) 6 m / s ² C) 1 m / s² D) 2,5 m / s² 2 / 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) 50 C) 20 D) 10 3 / 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 2 qonuni B) Nyutonning butun olam tortishish kuchi qonuni C) Nyutonning 1 qonuni D) Nyutonning 3 qonuni 4 / 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) 2 D) 1 5 / 25 Tezlanishning o’lchov birligini ko’rsating A) s/ m² B) m²/s C) m/s D) m/s² 6 / 25 Tezlanish formulasi qanday ifodalanadi A) S = at² / 2 B) p = F / S C) a = (v - v˳)/t D) p = m / v 7 / 25 Yuqoriga tik otilgan jism H balandlikkacha ko’tarildi. U 4H balandlikkacha ko’tarilishi uchun otish tezligini qanday o’zgartirishi kerak? A) 4marta orttirish B) 1marta orttirish C) 2marta orttirish D) 5marta kamaytirish 8 / 25 Jismning harakat tenglamasi x = 2 – 3 t + 2 t2 formula bilan berilgan. Bu harakat uchun tezlik tenglamasini yozing A) υ= - 3 + 4 t B) υ = 4 t C) υ= 4 - 3 t D) υ= 4 + 3 t 9 / 25 Jism yerdan 35 m/s tezlik bilan tik yuqoriga otildi. U yerga necha sekunddan so’ng tushadi? A) 9 B) 3 C) 7 D) 5 10 / 25 25 m/s tezlik bilan yuqoriga tik otilgan jismning 2 s dan keyingi tezligi qancha bo’ladi? A) 15 m/s B) 5 m/s C) 10 m/s D) 20 m/s 11 / 25 Tekis sekinlanuvchan harakatda tezlik va tezlanish ishoralarining munosabatini ko’rsating. 1) υ0 > 0, a<0 2) υ0 = 0, a<0 3) υ0 < 0, a>0 4) υ >0, a>0 A) 3,4 B) 4 C) 1,3 D) 2,3 12 / 25 Erkin tushish deb qaysi harakatga aytiladi A) xar qanday harakatga B) qo’ldan qo’yib yuborgan jism harakatiga C) jismning havosiz joyda faqat yerning tortish ta’sridagi harakatiga D) jismga hech qanday kuch ta’sir qilmagandagi harakatiga 13 / 25 Jismning yerga tortilish kuchi …… deb ataladi A) bosim kuchi B) jism og’irligi C) og’irlik kuchi D) reaksiya kuchi 14 / 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 15 / 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 16 / 25 Yerning tortishish kuchi ta’sirida jismning yer atrofida aylana bo’ylab, harakatlanishida erishtiradigan tezlik ………. deyiladi A) 3-kosmik tezlik B) 1-kosmik tezlik C) notekis tezlik D) 2-kosmik tezlik 17 / 25 Yer sirtidagi h=2R balandlikda erkin tushish tezlanishi nimaga teng A) g B) g/9 C) g/4 D) g/2 18 / 25 Oyda erkin tushish tezlanishi nimaga teng? (m/s2) A) 9,8 B) 7,9 C) 1 D) 1,6 19 / 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) 7,9 km/s B) 9,8 km/s C) 1 km/s D) 11,2 km/s 20 / 25 Oyning yer atrofida aylanish tezligi nimaga teng A) 1 km/s B) 30 km/s C) 40 km/s D) 10 km/s 21 / 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) 1,05 rad C) 3 rad D) 5 rad 22 / 25 Burchakli ko’chishning vaqtga nisbati qanday fizik kattalik? A) tezlanish B) davr C) chastota D) burchakli tezlik 23 / 25 Soatning minut mili aylanishining chastotasini toping.(Hz) A) 1/3600 B) 1/7200 C) 100 D) 1/100 24 / 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) 100 C) 2 D) 10 25 / 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) 1 D) 3 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