Câu 23. Một viên đạn đang bay thẳng đứng lên cao, khi lên tới điểm cao nhất thì viên đạn bị nổ thành 2
mảnh có khối lượng lần lượt là m và 2m. . Biết tổng động năng của 2 mảnh ngay sau khi nổ là 9000J. Động
năng mảnh đạn có khối lượng m ngay sau khi nổ là
A. 4000J.
B. 2000J . C. 8000J.
D. 6000J.
Answers: 3
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Câu 23. Một viên đạn đang bay thẳng đứng lên cao, khi lên tới điểm cao nhất thì viên đạn bị nổ thành...
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