Physics, 24.11.2021 18:10 keke6361

Người ta gắn vào mép bàn một ròng rọc có khối lượng không đáng kể. Hai vật A và B có khối lượng lần lượt
m 200g A 
và
m 300g B

được nối với nhau bằng một sợi dây vắt qua ròng
rọc. Ma sát giữa vật A và mặt bàn có
k 0,25 
. Lấy
2
g 10m / s  .
a. Xác định gia tốc chuyển động của hệ vật.

Answers: 3

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Người ta gắn vào mép bàn một ròng rọc có khối lượng không đáng kể. Hai vật A và B có khối lượng lầ...