如图所示,物体A以速度v沿杆匀速下滑,A用细绳通过定滑轮拉物体B,则当绳子与水平方向夹角为θ时,求VB!如图所示,物体A以速度v沿杆匀速下滑,A用细绳通过定滑轮拉物体B,则当绳子与水平方向夹
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![如图所示,物体A以速度v沿杆匀速下滑,A用细绳通过定滑轮拉物体B,则当绳子与水平方向夹角为θ时,求VB!如图所示,物体A以速度v沿杆匀速下滑,A用细绳通过定滑轮拉物体B,则当绳子与水平方向夹](/uploads/image/z/3574422-54-2.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E7%89%A9%E4%BD%93A%E4%BB%A5%E9%80%9F%E5%BA%A6v%E6%B2%BF%E6%9D%86%E5%8C%80%E9%80%9F%E4%B8%8B%E6%BB%91%2CA%E7%94%A8%E7%BB%86%E7%BB%B3%E9%80%9A%E8%BF%87%E5%AE%9A%E6%BB%91%E8%BD%AE%E6%8B%89%E7%89%A9%E4%BD%93B%2C%E5%88%99%E5%BD%93%E7%BB%B3%E5%AD%90%E4%B8%8E%E6%B0%B4%E5%B9%B3%E6%96%B9%E5%90%91%E5%A4%B9%E8%A7%92%E4%B8%BA%CE%B8%E6%97%B6%2C%E6%B1%82VB%21%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E7%89%A9%E4%BD%93A%E4%BB%A5%E9%80%9F%E5%BA%A6v%E6%B2%BF%E6%9D%86%E5%8C%80%E9%80%9F%E4%B8%8B%E6%BB%91%2CA%E7%94%A8%E7%BB%86%E7%BB%B3%E9%80%9A%E8%BF%87%E5%AE%9A%E6%BB%91%E8%BD%AE%E6%8B%89%E7%89%A9%E4%BD%93B%2C%E5%88%99%E5%BD%93%E7%BB%B3%E5%AD%90%E4%B8%8E%E6%B0%B4%E5%B9%B3%E6%96%B9%E5%90%91%E5%A4%B9)
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