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 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) 4 B) 1 C) 3 D) 2 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) 10 C) 50 D) 20 3 / 25 Yer uchun uchunchi kosmik tezlik qiymatini ko’rsating A) 16,7 km/s B) 11,2 km/s C) 7,9 m/s D) 7,9 km/s 4 / 25 Zambarakdan gorizantga burchak ostida uchib chiqqan snaryad 12 sekund uchgan. Snaryad ko’tarilgan eng yuqori balandlik qancha A) 10m B) 20m C) 180m D) 360m 5 / 25 Jismning yerga tortilish kuchi …… deb ataladi A) og’irlik kuchi B) jism og’irligi C) reaksiya kuchi D) bosim kuchi 6 / 25 Raketa quyosh sistemasini tark etishi uchun u yerdan 16,7 km/s tezlik bilan uchirilishi kerak. Bu tezlikni nomi A) notekis tezlik B) 1-kosmik tezlik C) 3-kosmik tezlik D) 2-kosmik tezlik 7 / 25 Agar jism biror balandlikdan ikki baravar katta tezlik bilan gorizantal otilsa, uning uchish uzoqligi qanday o’zgaradi A) 4 martta ortadi B) 2 marta ortadi C) 2 marta kamayadi D) o’zgarmaydi 8 / 25 Oyda erkin tushish tezlanishi nimaga teng? (m/s2) A) 1,6 B) 7,9 C) 1 D) 9,8 9 / 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/4 C) F/16 D) F/2 10 / 25 Yer sirtidagi h=2R balandlikda erkin tushish tezlanishi nimaga teng A) g B) g/4 C) g/2 D) g/9 11 / 25 Agar jism biror balandlikdan ikki baravar katta tezlik bilan gorizantal otilsa, uning uchish vaqti qanday o’zgaradi A) 2 marta kamayadi B) 2 marta ortadi C) 4 martta ortadi D) o’zgarmaydi 12 / 25 Jism harakat tenglamasi x=5+3t–t2 formula bilan berilgan. Jismning boshlang’ich koordinatasi nimaga teng? A) 5 m B) 9 m C) 1 m D) 3 m 13 / 25 Jism tezlik proporsiyasining vaqtga bog’lanish v = 3+2t (m/s) ko’rinishga ega. Ko’chish proyeksiyasining vaqtga bog’lanishi qanday? A) S = 3t + 1 t² B) S = 3t + 2 t² C) S = 2t + 3 ² D) S = 2t² 14 / 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) 4 B) 3,4 C) 2,3 D) 1,3 15 / 25 Tezlanishning o’lchov birligini ko’rsating A) m²/s B) m/s C) s/ m² D) m/s² 16 / 25 Erkin tushib harakat qilayotgan jismning tezligi har sekundda qanchaga o’zgaradi A) 10 m/s B) 5 m/s C) 15 m/s D) o’zgarmaydi 17 / 25 Soatning 30 mm uzunlikdagi minut mili uchi 10 minutda 31,4 mm uzunlikdagi yo’lni bosib o’tdi. Minut mili uchining chiziqli tezligini toping A) 0,5 m/s B) 0,0005 m/s C) 0,005 m/s D) 0,00005 m/s 18 / 25 Velosiped g’ildiragining o’qidan eng uzoq nuqtasi 0,02 s davomida 20 km yo’lni bosib o’tdi. Velosipedning tezligini toping A) 4 km/soat B) 3,6 km/soat C) 36 km/soat D) 0,36 km/soat 19 / 25 Jismning vaqt birligi ichida to’liq aylanishlari soni aylanishi ….. deb ataladi A) tezligi B) tezlanishi C) chastotasi D) davri 20 / 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) 100 C) 2 D) 1 21 / 25 Aylanma tekis harakatda tezlanish qanday yo’nalgan? A) radius bo’ylab markazdan B) xar xil yo’nalgan bo’lishi mumkin C) radius bo’ylab markazga D) urinma bo’ylab 22 / 25 Jismning bir marta to’liq aylanib chiqishi uchun ketgan vaqt aylanishi …… deyiladi A) tezligi B) tezlanishi C) davri D) chastotasi 23 / 25 Aylanma tekis harakatdagi chiziqli tezlik formulasini ko’rsating. 1) V=2¶R/T, 2) V=wR, 3)V=2¶RV A) 2 B) 1,2,3 C) 3 D) 1 24 / 25 Markazga intilma tezlanish formulasi qaysi ifodada to'g'ri ko’rsatilgan? A) a=(v-v˳)/t B) a=F/m C) a=v²/R D) a=v/t 25 / 25 Soatning vaqt mili burchakli tezligini toping. (rad/s) A) π/10 B) π/2600 C) π/1800 D) π/30 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