Uy » Choraklik online testlar » Fizika choraklik » 7-sinf Fizika 4-chorak Fizika choraklik 7-sinf Fizika 4-chorak InfoMaster Aprel 26, 2021 1017 Ko'rishlar 0 SaqlashSaqlanganOlib tashlandi 1 0 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 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) 11,2 km/s D) 1 km/s 2 / 25 Lift a A) (P=mg) B) P=m(a-g) C) P=m(g-a) D) P=m(g+a) 3 / 25 Liftdagi odam o’ta yuklanishga duch kelishi mumkinmi? A) Yo’q B) Xa agar lift tezlanish bilan yuqoriga ko’tarilsa C) Xa lift yuqoriga ko’tarilganda D) Xa lift tezlanish bilan pastga tushganda 4 / 25 Yer uchun birinchi kosmik tezlik qiymatini ko’rsating A) 7,9 km/s B) 7,9 m/s C) 11,2 km/s D) 16,7 km/s 5 / 25 Faqat butun olam tortishish kuchlari ta’sirida erkin harakat qilayotgan xar qanday jism ......... xolatida bo’ladi A) vaznsizlik B) turg’unmas muvozanat C) o’ta yuklanish D) turg’un muvozanat 6 / 25 Jism tezlik proporsiyasining vaqtga bog’lanish v = 3+2t (m/s) ko’rinishga ega. Ko’chish proyeksiyasining vaqtga bog’lanishi qanday? A) S = 2t² B) S = 3t + 1 t² C) S = 2t + 3 ² D) S = 3t + 2 t² 7 / 25 Jism 20 m/s tezlik bilan tik yuqoriga otildi. Jism necha sekund eng baland nuqtasigacha ko’tariladi? g = 10 m/s2 A) 4 c B) 3 c C) 2 c D) 1 c 8 / 25 Jism harakat tenglamasi x=5+3t–t2 formula bilan berilgan. Jismning boshlang’ich koordinatasi nimaga teng? A) 9 m B) 1 m C) 5 m D) 3 m 9 / 25 Erkin tushayotgan jism ikkinchi sekundda qanday masofani (m) o’tadi? A) 25 B) 5 C) 15 D) 35 10 / 25 25 m/s tezlik bilan yuqoriga tik otilgan jismning 2 s dan keyingi tezligi qancha bo’ladi? A) 20 m/s B) 15 m/s C) 5 m/s D) 10 m/s 11 / 25 Tezlanishning o’lchov birligini ko’rsating A) m/s² B) m²/s C) m/s D) s/ m² 12 / 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) 1,3 B) 4 C) 3,4 D) 2,3 13 / 25 Avtomabil 200 m radiusli aylana yo’lda 72 km/soat tezlik bilan harakatlanadi. Uning markaziga intilma tezlanishi qancha m/s2 ga teng? A) 2 B) 4 C) 5 D) 3 14 / 25 Aylanma tekis harakatga chiziqli tezlik va burchakli tezlik bog’lanish formulasini ko’rsating A) υ=ωR B) ω=2p υ C) υ=2pR/T D) ω=2p/T 15 / 25 Soatning minut mili aylanishining chastotasini toping.(Hz) A) 100 B) 1/100 C) 1/3600 D) 1/7200 16 / 25 Aylanma tekis harakatda chiziqli tezlik bilan burchak tezlik orasidagi munosabat formulasini ko’rsating A) w=2¶V B) V=wR C) w=2¶/T D) w=4/t 17 / 25 Nyutonning 2-qonuni formulasini ko’rsating A) a = F / m B) a = v/t C) a = v² /R D) a = 2s/ t² 18 / 25 Nyutonning 3 qonuni formulasi qaysi ifodada to’g’ri ko’rsatilgan? A) F = mv²/ R B) F = mg C) F = - k x D) F1 =- F2 19 / 25 60 N kuch jismga 0,6 m/s2 tezlanish beradi. Qanday kuch bu jismga 2 m/s2 tezlanish beradi? A) 180 N B) 200 N C) 250 N D) 150 N 20 / 25 1000 mN necha N? A) 70 B) 10 C) 1 D) 400 21 / 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) 8 B) 16 C) 12 D) 4 22 / 25 Qaysi shart bajarilganda, jism suyuqlikda tekis cho’ka boshlaydi? (mg-og’irlik kuchi, Fa- Arximed kuchi, F-qarshilik kuchi) 1) m g > F = F a 2) m g = F 3) m g = F = F a 4) mg < F = F a A) 2 B) 3 C) 1 D) 4 23 / 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) 3 B) 1 C) 2 D) 4 24 / 25 Vaznsiz ko’zg’almas blok orqali o’tkazilgan vaznsiz cho’zilmas ipga massalari 6 va 4 kg bo’lgan ikki yuk osilgan. Ishqalanish yo’q. Agar bu sistema o’ziga qo’yib berilsa, yuklar qanday tezlanish (m/s2) bilan xarakat qiladi? A) 2 B) 3 C) 4 D) 1 25 / 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) 4 B) 2 C) 3 D) 1 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