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trada2998
2 năm trước
Một vật có khối lượng 2000kg đang chuyển động với vận tốc 20m/s trên mặt phẳng nằm ngang có ma sát thì tăng ga với một lực 4000N, sau khoảng thời gian 20s vận tốc của vật đạt được 40m/s. Lấy g=10m/s². Tính A. Gia tốc của vật B. Quãng đường vật đi được sau thời gian đó? C. Hệ số ma sát giữa vật và mặt phẳng ngang? Giúp mik vs chiều thi r
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