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pisces250299
2 năm trước
Người ta hướng 1 nòng súng theo phương ngag về tâm 1 tấm bia đặt cak nó 1 khoảng 200m, phương của nòng súng và tâm của tấm bia ở trên cùng 1 phươg song song với mặt đất. Người ta cho súng nhả đạn với vận tốc ban đầu 500m/s a) Viên đạn sẽ chạm nơi nào trên tấm bia b) Cần phải nghiêg nòng súng so với phương ngang 1 góc bao nhiều để viên đạn đến tâm bia
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