7-sinf Fizika 4-chorak Aprel 26, 2021Aprel 26, 2021 da chop etilgan InfoMaster tomonidan 7-sinf Fizika 4-chorak ga fikr bildirilmagan. 0 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 25 Aylanma tekis harakatda tezlanish qanday yo’nalgan? A) urinma bo’ylab B) radius bo’ylab markazdan C) xar xil yo’nalgan bo’lishi mumkin D) radius bo’ylab markazga 2 / 25 Markazga intilma tezlanish formulasi qaysi ifodada to'g'ri ko’rsatilgan? A) a=(v-v˳)/t B) a=v/t C) a=F/m D) a=v²/R 3 / 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) 10 B) 2 C) 1 D) 100 4 / 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) 1786 B) 2000 C) 2800 D) 50 5 / 25 Aylanma tekis harakatda chiziqli tezlik bilan burchak tezlik orasidagi munosabat formulasini ko’rsating A) V=wR B) w=2¶V C) w=4/t D) w=2¶/T 6 / 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) 5 rad B) 3 rad C) 1,05 rad D) 4 rad 7 / 25 Soatning vaqt mili burchakli tezligini toping. (rad/s) A) π/2600 B) π/1800 C) π/30 D) π/10 8 / 25 Soatning minut mili burchakli tezligini toping A) π/10 B) π/1800 C) π/30 D) π/2600 9 / 25 Yer uchun uchunchi 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 10 / 25 Yer sirtidagi h=2R balandlikda erkin tushish tezlanishi nimaga teng A) g/2 B) g/4 C) g/9 D) g 11 / 25 Yer sirtidagi jism yerga F kuch bilan tortilmoqda. Yer sirtidan h=2R balandlikka ko’tarilsa yerga qanday kuch bilan tortiladi? R-Ep radus A) F/9 B) F/2 C) F/4 D) F/16 12 / 25 Oyda erkin tushish tezlanishi nimaga teng? (m/s2) A) 7,9 B) 1,6 C) 1 D) 9,8 13 / 25 Yerga tortilishi tufayli jismning tayanchga yoki osmaga tasr etadigan kuchi .......... deb ataladi A) bosim kuchi B) jism og’irligi C) og’irlik kuchi D) reaksiya kuchi 14 / 25 Jismning yerga tortilish kuchi …… deb ataladi A) bosim kuchi B) og’irlik kuchi C) reaksiya kuchi D) jism og’irligi 15 / 25 Tezlanish formulasi qanday ifodalanadi A) a = (v - v˳)/t B) S = at² / 2 C) p = F / S D) p = m / v 16 / 25 m/s2 tezlanish bilan to’g’ri chiziq bo’ylab harakatlanayotgan jismning holatidan boshlab birinchi sekunda qanday masofani (m) o’tadi? A) 4 B) 6 C) 8 D) 7 17 / 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) 2,3 B) 4 C) 3,4 D) 1,3 18 / 25 Erkin tushish deb qaysi harakatga aytiladi A) jismning havosiz joyda faqat yerning tortish ta’sridagi harakatiga B) xar qanday harakatga C) qo’ldan qo’yib yuborgan jism harakatiga D) jismga hech qanday kuch ta’sir qilmagandagi harakatiga 19 / 25 Xalqaro birliklar sistemasida kuch birligi A) kg / s² B) kg*m / s² C) kg*m²/s² D) m / s² 20 / 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) 6 m / s ² B) 1 m / s² C) 3 m / s² D) 2,5 m / s² 21 / 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) 1 B) 3 C) 2 D) 4 22 / 25 Massasi 0,5 kg bo’lgan koptokka 0,02 s davomida zarb berilgandan keyin u 10 m / s tezlik oladi. Zarbning o’rtacha kuchini toping A) 200 N B) 250 N C) 1000 N D) 500 N 23 / 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) 1 m/s² D) 0,8 m/s² 24 / 25 Odam liftda turibdi. Odamga ta’sir qiluvchi kuchlar: mg – og’irlik kuchi, N – tayanch reaksiya kuchi, Lift tinch turganda kuchlar orasidagi munosabatni ko’rsating 1) mg > N 2) mg < N 3) mg = N 4) mg = 0; N = 0 A) 1 B) 3 C) 4 D) 2 25 / 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) 3 B) 2 C) 1 D) 4 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