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 Tezligi υ=5-3 t (m/s) tenglama bilan berilgan jismning boshlangich tezligi (m/s) nimaga teng? A) 5 B) 3 C) 2 D) 4 2 / 25 Tezlanishning o’lchov birligini ko’rsating A) m/s B) m²/s C) s/ m² D) m/s² 3 / 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) 1,2 C) 1,3 D) 2,4 4 / 25 Joyidan qo’zg’algan jism 0,3 m/s2 tezlanish bilan harakat qilib, qancha vaqtda 9 m/s tezlikka erishadi? A) 30 s B) 20 s C) 15 s D) 25 s 5 / 25 Tekis tezlanuvchan harakat qilayotgan “Matiz” 10 s davomida tezligini 54 km / soat dan 100 km / soat ga oshirdi. «Matiz»ning tezlanishini toping A) 2,5 m/s² B) 3 m/s² C) 15 m/s² D) 13 m/s² 6 / 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) 1 D) 4 7 / 25 1000 mN necha N? A) 10 B) 1 C) 400 D) 70 8 / 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) 2 B) 1 C) 3 D) 4 9 / 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 10 / 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) 600 N B) 540 N C) 660 N D) 480 N 11 / 25 Soatning vaqt mili burchakli tezligini toping. (rad/s) A) π/10 B) π/30 C) π/2600 D) π/1800 12 / 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) 3 C) 4 D) 5 13 / 25 Aylanma tekis harakatda chiziqli tezlik bilan burchak tezlik orasidagi munosabat formulasini ko’rsating A) w=2¶/T B) V=wR C) w=2¶V D) w=4/t 14 / 25 Jismning vaqt birligi ichida to’liq aylanishlari soni aylanishi ….. deb ataladi A) tezligi B) chastotasi C) davri D) tezlanishi 15 / 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) 3 rad B) 4 rad C) 1,05 rad D) 5 rad 16 / 25 Aylanma tekis harakatda aylanish davri va chastotasi bog’lanishi formulasini ko’rsating A) T=1/v B) T=t/N C) t=T*N D) T=2¶R/V 17 / 25 Soatning sekund mili burchakli tezligini toping. (rad/s) A) π/2600 B) π/1800 C) π/10 D) π/30 18 / 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) 2 C) 1 D) 3 19 / 25 Markazga intilma tezlanish formulasi qaysi ifodada to'g'ri ko’rsatilgan? A) a=F/m B) a=(v-v˳)/t C) a=v²/R D) a=v/t 20 / 25 Avtomabil 90 km/soat tezlik bilan tekis harakatlanmoqda. Agar avtomobil g’ildiragining raidusi 35 sm bo’lsa, g’ildirak markazidan shuncha masofa uzoqlikdagi nuqtasining markaziga intilma tezlanishini toping. (m/s2) A) 2000 B) 2800 C) 50 D) 1786 21 / 25 Yer uchun birinchi kosmik tezlik qiymatini ko’rsating A) 7,9 m/s B) 7,9 km/s C) 11,2 km/s D) 16,7 km/s 22 / 25 Yerning quyosh atrofida aylanish tezligi nimaga teng A) 1 km/s B) 30 km/s C) 10 km/s D) 40 km/s 23 / 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 24 / 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 25 / 25 Yer uchun uchunchi kosmik tezlik qiymatini ko’rsating A) 7,9 m/s B) 16,7 km/s C) 11,2 km/s D) 7,9 km/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 Foydali bo'lsa mamnunmiz