Fizika7- sinf Mеxanika so`zi qanday ma'noni anglatadi

Fizika 7sinf
IV-chorak.


1. Raketa qanday kuch tasirida harakatlanadi?
a) Arximed kuchi b) Reaktiv kuch c) Og`irlik kuchi d) Bosim kuchi
e) Ishqalanish kuchi
2. Raketa tezligi gaz tezligi 2 marta kamayganda qanday o`zgaradi?
a) 2 marta ortadi b) 2 marta kamayadi c) o`zgarmaydi d) 4 marta ortadi e) 4 marta kamayadi
3. Jism 10 N kuch ta’sirida 60 sm masofaga ko`chsa, bu kuch qancha ish bajargan?
a) 600 J b) 60 J c) 6 J d) 50 J e) 70 J
4. Jism 4,5 N kuch ta’sirida gorizontal yo`nalishda 2 metr masofaga ko`chdi. Og`irlik kuchining bajargan ishi qanchaga teng?
a) 9 N b) 2,25 N c) 6,5 N d) 0 e) T.J.Y
5. Jismning kinetik energiyasi qanday birlikda o`lchanadi?
a) Joul b) Gramm c) Nyuton d) Paskal e) m/s²
6. Jism tezligi 4 marta kamayganda uning kinetik energiyasi qanday o`zgaradi?
a) 2 marta ortadi b) 4 marta ortadi c) 8 marta ortadi d) 16 marta kamayadi
e) o`zgarmaydi
7. Tezligi 72 km/soat bo`lgan 2 t massali avtomobil to`xtashi uchun qancha ish bajarilishi kYerak?
a) 4 x10⁵ J b) 400 x10⁵ J c) 0,4 J d) 40 kJ e) 4000 kJ
8. Potensial energiya 4 marta ortgan. Balandlik qanday o`zgargan?
a) 2 marta ortgan b) 4 marta ortgan c) 4 marta kamaygan
d) 8 marta ortgan e) o`zgarmagan
9. Quvvat qanday birlikda o`lchanadi?
a) Joul b) kg c) Vatt d) Metr e) Paskal
10. Quvvati 16 W bo`lgan mashina 2 minutda qancha ish bajaradi?
a) 32 J b) 1,92 kJ c) 14 J d) 8 J e) T.J.Y
11.Rasmda qanday harakat ifodalangan.


A )tekis tezlanuvchan harakat
B) notekis harakat
C) Reaktiv harakat
D) Barcha javoblar to’g’ri


12.Raketaning tuzilishini ifodalang rasm asosida.


13.Grafikni izohlang.
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1.