物体重力的大小为Q,用细绳BA、CA悬挂(如下图所示),a=60°,若将BA绳剪断,则该瞬间CA绳的张力为(),
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![物体重力的大小为Q,用细绳BA、CA悬挂(如下图所示),a=60°,若将BA绳剪断,则该瞬间CA绳的张力为(),](/uploads/image/z/14212742-14-2.jpg?t=%E7%89%A9%E4%BD%93%E9%87%8D%E5%8A%9B%E7%9A%84%E5%A4%A7%E5%B0%8F%E4%B8%BAQ%2C%E7%94%A8%E7%BB%86%E7%BB%B3BA%E3%80%81CA%E6%82%AC%E6%8C%82%28%E5%A6%82%E4%B8%8B%E5%9B%BE%E6%89%80%E7%A4%BA%29%2Ca%3D60%C2%B0%2C%E8%8B%A5%E5%B0%86BA%E7%BB%B3%E5%89%AA%E6%96%AD%2C%E5%88%99%E8%AF%A5%E7%9E%AC%E9%97%B4CA%E7%BB%B3%E7%9A%84%E5%BC%A0%E5%8A%9B%E4%B8%BA%28%29%2C)
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