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Physics, 24.11.2021 20:20 nickcjacques
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.
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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 l...
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