Og'irligi P=500 N bo'lgan sement bilan to'ldirilgan qop bloklar yordamida h=1 m balandlikda ko'tarilmoqda. Bunda odam qanday ish (J) bajaradi?

Og'irligi P=500 N bo'lgan sement bilan to'ldirilgan qop bloklar yordamida h=1 m
  1. 250
  2. 500
  3. 750
  4. 850

📝 Detailed explanation

Qo'zg'aluvchi blok kuchni 2 marta kamaytiradi: F = P/2. Lekin ip 2h masofaga tortiladi.
A = F·2h = (P/2)·2h = P·h = 500·1 = 500 J.
Ish blok ishlatilganda ham o'zgarmaydi (energiya saqlanish qonuni).
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