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thuyphuonganh
2 năm trước
Câu 10: Một vật có khối lượng 100g được ném thẳng đứng lên cao với vận tốc 8m/s từ độ cao 4m so với mặt đất. Lấy g = 10m/s2.Xác định vị trí mà tại đó động năng bằng 3 lần thế năng? A. 1,8m B. 3,6m C. 0,8m D. 7,2m giúp mình vs mọi người ơi mình cảm ơn rất nhiều
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