Uy » Choraklik online testlar » Fizika choraklik » 7-sinf Fizika 4-chorak Fizika choraklik 7-sinf Fizika 4-chorak InfoMaster Aprel 26, 2021 1021 Ko'rishlar 0 SaqlashSaqlanganOlib tashlandi 1 0 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 25 60 N kuch jismga 0,8 m/s2 tezlanish beradi. Qanday kuch bu jismga 2 m/s2 tezlanish beradi? A) 240 N B) 24 N C) 150 N D) 15 N 2 / 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) 6 m / s ² C) 2,5 m / s² D) 3 m / s² 3 / 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) 0,5 m/s² B) 1 m/s² C) 2 m/s² D) 0 4 / 25 Soatning vaqt mili burchakli tezligini toping. (rad/s) A) π/1800 B) π/30 C) π/10 D) π/2600 5 / 25 Markazga intilma tezlanish formulasi qaysi ifodada to'g'ri ko’rsatilgan? A) a=F/m B) a=(v-v˳)/t C) a=v/t D) a=v²/R 6 / 25 Aylanish davri bilan chiziqli tezligi orasidagi munosabat formulasini toping. A) V=S/t B) V=wR C) V=2¶R/T D) V=at 7 / 25 Jismning vaqt birligi ichida to’liq aylanishlari soni aylanishi ….. deb ataladi A) chastotasi B) tezlanishi C) davri D) tezligi 8 / 25 Avtomabil 200 m radiusli aylana yo’lda 72 km/soat tezlik bilan harakatlanadi. Uning markaziga intilma tezlanishi qancha m/s2 ga teng? A) 4 B) 3 C) 5 D) 2 9 / 25 Tezlanishning o’lchov birligini ko’rsating A) m/s B) m/s² C) m²/s D) s/ m² 10 / 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) 4 C) 7 D) 6 11 / 25 Avtomobil 5 m/s2 tezlanish bilan tinch holatdan harakat boshladi. U 4s da necha metr yo’l o’tadi? A) 20 B) 40 C) 10 D) 30 12 / 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) 1,3 D) 3,4 13 / 25 Yuqoriga tik otilgan jism H balandlikkacha ko’tarildi. U 4H balandlikkacha ko’tarilishi uchun otish tezligini qanday o’zgartirishi kerak? A) 2marta orttirish B) 1marta orttirish C) 5marta kamaytirish D) 4marta orttirish 14 / 25 Tezlanish formulasi qanday ifodalanadi A) a = (v - v˳)/t B) S = at² / 2 C) p = m / v D) p = F / S 15 / 25 Yerga tortilishi tufayli jismning tayanchga yoki osmaga tasr etadigan kuchi .......... deb ataladi A) jism og’irligi B) bosim kuchi C) og’irlik kuchi D) reaksiya kuchi 16 / 25 Lift a A) P=m(g-a) B) P=m(a-g) C) (P=mg) D) P=m(g+a) 17 / 25 Erkin tushish tezlanishi jismning yer sirtidan balandligiga bog’likligi qaysi formulada ko’rsatilgan A) m/s² B) g=GM/(R+h)² C) g/m² D) f/m 18 / 25 Liftdagi odam o’ta yuklanishga duch kelishi mumkinmi? A) Yo’q B) Xa lift yuqoriga ko’tarilganda C) Xa lift tezlanish bilan pastga tushganda D) Xa agar lift tezlanish bilan yuqoriga ko’tarilsa 19 / 25 Agar jism biror balandlikdan ikki baravar katta tezlik bilan gorizantal otilsa, uning uchish uzoqligi qanday o’zgaradi A) o’zgarmaydi B) 2 marta kamayadi C) 4 martta ortadi D) 2 marta ortadi 20 / 25 Oyning yer atrofida aylanish tezligi nimaga teng A) 1 km/s B) 30 km/s C) 10 km/s D) 40 km/s 21 / 25 Yer uchun birinchi kosmik tezlik qiymatini ko’rsating A) 16,7 km/s B) 7,9 m/s C) 7,9 km/s D) 11,2 km/s 22 / 25 Raketa quyosh sistemasini tark etishi uchun u yerdan 16,7 km/s tezlik bilan uchirilishi kerak. Bu tezlikni nomi A) 2-kosmik tezlik B) 3-kosmik tezlik C) 1-kosmik tezlik D) notekis tezlik 23 / 25 Ko’tarilish balandligi 4 marta ortishi uchun yuqoriga otilgan jismning boshlang’ich tezligini necha marta oshirish lozim A) 60 martta B) 55 martta C) 45 martta D) 50 martta 24 / 25 Agar jism biror balandlikdan ikki baravar katta tezlik bilan gorizantal otilsa, uning uchish vaqti qanday o’zgaradi A) 4 martta ortadi B) o’zgarmaydi C) 2 marta kamayadi D) 2 marta ortadi 25 / 25 Faqat butun olam tortishish kuchlari ta’sirida erkin harakat qilayotgan xar qanday jism ......... xolatida bo’ladi A) turg’un muvozanat B) vaznsizlik C) o’ta yuklanish D) turg’unmas muvozanat 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