
C. n/(n-1)
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một vật được thả rơi tự do trong quá trình vật rơi
- D. 40 m/s Một vật rơi tự do. Quãng đường vật rơi được sau 4 giây là bao nhiêu? (g = 9.8 m/s^2)
- C. sqrt(3) s
- B. 2t
- B. Vật có kích thước nhỏ hơn rơi nhanh hơn
- A. 2t, 2v
- D. 1/n Nếu một vật rơi tự do không vận tốc đầu từ độ cao h thì vận tốc khi chạm đất tỉ lệ với
- B. sqrt(2gh)/2
- D. 39.2 m Nếu thả hai vật có cùng kích thước nhưng khối lượng khác nhau rơi tự do trong không khí thì vật nào chạm đất trước?
- A. Bằng nhau
- C. 0
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