如图,一小球和a,b两根细绳相连,两绳固定在细杆A,B两点,其中a长l=50厘米,当两绳都拉直时,两细绳和细杆的夹角分别为θ1=37度,θ2=53度,取g=10米每二次方秒,sin37°=0.6,cos37°=0.8.问:要使两根细绳都
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![如图,一小球和a,b两根细绳相连,两绳固定在细杆A,B两点,其中a长l=50厘米,当两绳都拉直时,两细绳和细杆的夹角分别为θ1=37度,θ2=53度,取g=10米每二次方秒,sin37°=0.6,cos37°=0.8.问:要使两根细绳都](/uploads/image/z/13192496-8-6.jpg?t=%E5%A6%82%E5%9B%BE%2C%E4%B8%80%E5%B0%8F%E7%90%83%E5%92%8Ca%2Cb%E4%B8%A4%E6%A0%B9%E7%BB%86%E7%BB%B3%E7%9B%B8%E8%BF%9E%2C%E4%B8%A4%E7%BB%B3%E5%9B%BA%E5%AE%9A%E5%9C%A8%E7%BB%86%E6%9D%86A%2CB%E4%B8%A4%E7%82%B9%2C%E5%85%B6%E4%B8%ADa%E9%95%BFl%3D50%E5%8E%98%E7%B1%B3%2C%E5%BD%93%E4%B8%A4%E7%BB%B3%E9%83%BD%E6%8B%89%E7%9B%B4%E6%97%B6%2C%E4%B8%A4%E7%BB%86%E7%BB%B3%E5%92%8C%E7%BB%86%E6%9D%86%E7%9A%84%E5%A4%B9%E8%A7%92%E5%88%86%E5%88%AB%E4%B8%BA%CE%B81%3D37%E5%BA%A6%2C%CE%B82%3D53%E5%BA%A6%2C%E5%8F%96g%3D10%E7%B1%B3%E6%AF%8F%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A7%92%2Csin37%C2%B0%3D0.6%2Ccos37%C2%B0%3D0.8.%E9%97%AE%EF%BC%9A%E8%A6%81%E4%BD%BF%E4%B8%A4%E6%A0%B9%E7%BB%86%E7%BB%B3%E9%83%BD)
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