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Physics, 21.10.2021 14:00 lizbeth232001
Một vật có khối lượng m 3 kg trượt từ đỉnh một mặt phẳng nghiêng ở độ cao 0,5m,
chiều dài mặt phẳng nghiêng là 1m. Khi tới chân mặt nghiêng, vận tốc của vật là v 2,45 m/s .
a. Tính công của lực ma sát khi vật trượt trên mặt nghiêng. Biết vận tốc ban đầu của vật bằng
không, lấy
2 g 10 m/s .
b. Xác định hệ số ma sát giữa vật và mặt nghiêng.
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Một vật có khối lượng m 3 kg trượt từ đỉnh một mặt phẳng nghiêng ở độ cao 0,5m,
chiều dài mặt ph...
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