Avtomobil 20 m/s o'zgarmas tezlik bilan harakatlanib ketayotgan edi. Avtomobil tormozlanib 4 m/s² tezlanish bilan tekis sekinlasha boshladi. Avtomobil to'xtashidan oldin so'nggi 3 s da qancha masofa (m) bosib o'tadi?

  1. 24
  2. 12
  3. 18
  4. 25

📝 Detailed explanation

To'liq to'xtash vaqti: t = v₀/a = 20/4 = 5 s.
So'nggi 3 s — bu t = 2 s dan t = 5 s gacha bo'lgan oraliq.
t = 2 s daги tezlik: v = 20 − 4·2 = 12 m/s.
So'ngra to'xtagungacha 3 s da bosib o'tilgan masofa:
S = v·t − a·t²/2 = 12·3 − 4·9/2 = 36 − 18 = 18 m.
Javob: 18 m.
3 / 36 (8%)
Question 3 of 36
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