28.如图所示,V形细杆AOB能绕其对称轴OO’转到,OO’沿竖直方向,V形杆的两臂与转轴间的夹角均为α=45°.两质量均为m=0.1kg的小环,分别套在V形杆的两臂上,并用长为l=1.2m、能承受最大拉力Fmax=4.5N
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![28.如图所示,V形细杆AOB能绕其对称轴OO’转到,OO’沿竖直方向,V形杆的两臂与转轴间的夹角均为α=45°.两质量均为m=0.1kg的小环,分别套在V形杆的两臂上,并用长为l=1.2m、能承受最大拉力Fmax=4.5N](/uploads/image/z/4973924-20-4.jpg?t=28%EF%BC%8E%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2CV%E5%BD%A2%E7%BB%86%E6%9D%86AOB%E8%83%BD%E7%BB%95%E5%85%B6%E5%AF%B9%E7%A7%B0%E8%BD%B4OO%E2%80%99%E8%BD%AC%E5%88%B0%2COO%E2%80%99%E6%B2%BF%E7%AB%96%E7%9B%B4%E6%96%B9%E5%90%91%2CV%E5%BD%A2%E6%9D%86%E7%9A%84%E4%B8%A4%E8%87%82%E4%B8%8E%E8%BD%AC%E8%BD%B4%E9%97%B4%E7%9A%84%E5%A4%B9%E8%A7%92%E5%9D%87%E4%B8%BA%CE%B1%3D45%C2%B0.%E4%B8%A4%E8%B4%A8%E9%87%8F%E5%9D%87%E4%B8%BAm%3D0.1kg%E7%9A%84%E5%B0%8F%E7%8E%AF%2C%E5%88%86%E5%88%AB%E5%A5%97%E5%9C%A8V%E5%BD%A2%E6%9D%86%E7%9A%84%E4%B8%A4%E8%87%82%E4%B8%8A%2C%E5%B9%B6%E7%94%A8%E9%95%BF%E4%B8%BAl%3D1.2m%E3%80%81%E8%83%BD%E6%89%BF%E5%8F%97%E6%9C%80%E5%A4%A7%E6%8B%89%E5%8A%9BFmax%3D4.5N)
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