54 km/h tezlik bilan harakatlanishda elektrovoz 90 kW quvvat sarflaydi. Agar elektrovozning FIK 80% ga teng bo'lsa, uning tortish kuchini aniqlang (kN).

  1. 3,3
  2. 4,6
  3. 4,8
  4. 6,9

📝 Detailed explanation

v = 54 km/h = 54/3,6 = 15 m/s
Foydali quvvat: P_foydali = P × η = 90 × 0,8 = 72 kW = 72000 W
Tortish kuchi: F = P_foydali / v = 72000 / 15 = 4800 N = 4,8 kN.
10 / 36 (28%)
Question 10 of 36
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