Uy » Choraklik online testlar » Fizika choraklik » 7-sinf Fizika 4-chorak Fizika choraklik 7-sinf Fizika 4-chorak InfoMaster Aprel 26, 2021 1084 Ko'rishlar 0 SaqlashSaqlanganOlib tashlandi 1 1 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 25 Jism harakat tenglamasi x=5+3t–t2 formula bilan berilgan. Jismning boshlang’ich koordinatasi nimaga teng? A) 5 m B) 3 m C) 9 m D) 1 m 2 / 25 Erkin tushish deb qaysi harakatga aytiladi A) qo’ldan qo’yib yuborgan jism harakatiga B) jismning havosiz joyda faqat yerning tortish ta’sridagi harakatiga C) jismga hech qanday kuch ta’sir qilmagandagi harakatiga D) xar qanday harakatga 3 / 25 Tezlanishning o’lchov birligini ko’rsating A) s/ m² B) m/s² C) m/s D) m²/s 4 / 25 Balkondan boshlang’ich tezliksiz tushib ketgan jism 1 s da yerga etib kelgan bo’lsa, u qanday balandlikdan (m) tushgan? A) 10 B) 20 C) 5 D) 15 5 / 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) 10 m/s D) 5 m/s 6 / 25 Samolyot qo’nish paytida g’ildiraklari yerga tekkandagi tezligi 360 km/soat. Agar uning tezlanishi 2m/s2 bo’lsa, u qancha vaqtdan keyin to’xtaydi A) 25 s B) 100 s C) 5 s D) 50 s 7 / 25 Tekis tezlanuvchan harakat qilayotgan “Matiz” 10 s davomida tezligini 54 km / soat dan 100 km / soat ga oshirdi. «Matiz»ning tezlanishini toping A) 3 m/s² B) 15 m/s² C) 2,5 m/s² D) 13 m/s² 8 / 25 Jism tezlik proporsiyasining vaqtga bog’lanish v = 3+2t (m/s) ko’rinishga ega. Ko’chish proyeksiyasining vaqtga bog’lanishi qanday? A) S = 2t + 3 ² B) S = 2t² C) S = 3t + 1 t² D) S = 3t + 2 t² 9 / 25 Tezligi υ=5-3 t (m/s) tenglama bilan berilgan jismning boshlangich tezligi (m/s) nimaga teng? A) 2 B) 4 C) 3 D) 5 10 / 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) 3,4 C) 1,3 D) 1,2 11 / 25 Aylanma tekis harakatda tezlanish qanday yo’nalgan? A) urinma bo’ylab B) radius bo’ylab markazdan C) radius bo’ylab markazga D) xar xil yo’nalgan bo’lishi mumkin 12 / 25 Soatning sekund mili burchakli tezligini toping. (rad/s) A) π/1800 B) π/10 C) π/30 D) π/2600 13 / 25 Agar moddiy nuqta aylana bo’ylab teng vaqtlar orasida teng yollarni bosib o’tsa, bunday harakat ....... harakat deyiladi A) aylanma o’zgaruvchan B) tekis C) notekis D) tekis aylanma tezlik 14 / 25 Aylanma tekis harakatdagi chiziqli tezlik formulasini ko’rsating. 1) V=2¶R/T, 2) V=wR, 3)V=2¶RV A) 1 B) 3 C) 2 D) 1,2,3 15 / 25 Soatning vaqt mili burchakli tezligini toping. (rad/s) A) π/30 B) π/10 C) π/1800 D) π/2600 16 / 25 Aylanma tekis harakatda aylanish davri va chastotasi bog’lanishi formulasini ko’rsating A) T=2¶R/V B) t=T*N C) T=t/N D) T=1/v 17 / 25 Soatning minut mili burchakli tezligini toping A) π/2600 B) π/10 C) π/30 D) π/1800 18 / 25 Oyning yer atrofida aylanish tezligi nimaga teng A) 30 km/s B) 10 km/s C) 40 km/s D) 1 km/s 19 / 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/2 B) F/4 C) F/16 D) F/9 20 / 25 Oyda erkin tushish tezlanishi nimaga teng? (m/s2) A) 7,9 B) 1,6 C) 9,8 D) 1 21 / 25 1 m/s2 tezlanish bilan tushayotgan liftdagi 20 kg massali bolaning og’irligi qancha? A) 200 N B) 180 N C) 190 N D) 170 N 22 / 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) 660 N B) 480 N C) 600 N D) 540 N 23 / 25 Suv quyilgan idish lift kabinasiga joylashtirilgan. Agar lift tezlanish bilan yuqoriga harakatlansa, suvning idish tubiga bosimi qanday o’zgaradi? A) Kamayadi B) Ortishi xam, kamayishi xam mumkin C) O’zgarmaydi D) Ortadi 24 / 25 Nyutonning 3 qonuni formulasi qaysi ifodada to’g’ri ko’rsatilgan? A) F = mg B) F = - k x C) F = mv²/ R D) F1 =- F2 25 / 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) 2 C) 3 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 Author: InfoMaster Foydali bo'lsa mamnunmiz