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Thuhoang
2 năm trước
2 vật có khối lượng tổng cộng 3kh nối bằng sợi dây nhẹ không dãn qua 1 ròng rọc nhẹ.Buông cho các vật chuyển động.Sau khi đi được quãng đường 1.2m mỗi vật có vận tốc 2m/s.Bỏ qua ma sát.Dùng ĐỊNH LUẬT BẢO TOÀN CƠ NĂNG,tính m1 và m2.Cho g=10m/s^2 Thankss all
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