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Physics, 22.07.2021 14:00 terrysizemore666

Một viên đạn có khối lượng 2 kg đang bay thẳng đứng lên cao với vận tốc 20 m trên giây thì nổ thành 2 mảnh mảnh thứ nhất có khối lượng 1,5 kg bay với vận tốc 200 m trên giây theo phương hợp với phương đứng góc 60 độ Hỏi vận tốc mảnh thứ nhất lần thứ hai gần nhất Với giá trị nào sau đây

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Một viên đạn có khối lượng 2 kg đang bay thẳng đứng lên cao với vận tốc 20 m trên giây thì nổ thành...
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