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hoangducluonghdl
2 năm trước
Một vật bắt đầu trượt xuống không ma sát từ đỉnh một con dốc cao 6m. a, Tính vận tốc của vật khi đến chân dốc b, Khi đến chân dốc, vật tiếp tục trượt chậm dần đều trên mặt phẳng ngang. Hệ số giữa vật và mặt phẳng ngang là 0,3. Tìm quảng đường vật đi được cho đến lúc dừng lại trên mặt ngang.
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