Nếu quả nặng E có trọng lượng 30 lb và góc
15o
, xác định trọng lượng của quả nặng...
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Physics, 01.07.2021 14:00 imatrueguyp612be
Nếu quả nặng E có trọng lượng 30 lb và góc
15o
, xác định trọng lượng của quả nặng F và lực
căng trong các sợi dây DC, CB, và BA để hệ ở trạng thái cân bằng.
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