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nhipham5678
2 năm trước
Một vật m= 2kg được ném thẳng đứng lên cai với vận tốc Vo = 10m/s. Lấy g = 10m/s^2. Tính độ biến thiên động lượng của vật sau khi ném một thời gian : a. t1 = 0,5s b. t2 = 2s
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