21. O`zbekistonda ishlab chiqariladigan «Matiz» rusumli avtomobil dvigatelining quvvati 52 ot kuchiga teng. Uni kW larda ifodalang.
A) 52,14; B) 38,246; C) 75; D) ~78.
22. Xonada ishlayotgan sovutgichning quvvati 280 W. Uning 3 soatda sarflagan energiyasini (kJ)da aniqlang.
A) 840; B) 3024; C) 1680; D) 1512.
23. Mexanik ish formulasini ko`rsating.
A) F•s; B) ρgh; C) mgh; D) mυ2/2.
24. Jismlarning ish bajara olish qobiliyatiga ... deyiladi.
A) potensial energiya; B) kinetik energiya;
C) mexanik ish; D) energiya.
25. Keltirilganlardan qaysi biri richagning muvozanat shartini ifodalaydi?
A) F1ℓ1 = F2ℓ2 ; B) F1,2= - F2,1 ; C) F = N•t; D) F2S1 = F1S2
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