一道大同杯的题目如图所示,长1米的轻杆BO一端通过光滑铰链铰在竖直墙上,另一端装一轻小光滑滑轮,重力 的物体通过摆线经滑轮系于墙上A点,平衡时OA恰好水平,现将A点沿着竖直墙向上缓慢移
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![一道大同杯的题目如图所示,长1米的轻杆BO一端通过光滑铰链铰在竖直墙上,另一端装一轻小光滑滑轮,重力 的物体通过摆线经滑轮系于墙上A点,平衡时OA恰好水平,现将A点沿着竖直墙向上缓慢移](/uploads/image/z/14531314-58-4.jpg?t=%E4%B8%80%E9%81%93%E5%A4%A7%E5%90%8C%E6%9D%AF%E7%9A%84%E9%A2%98%E7%9B%AE%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E9%95%BF1%E7%B1%B3%E7%9A%84%E8%BD%BB%E6%9D%86BO%E4%B8%80%E7%AB%AF%E9%80%9A%E8%BF%87%E5%85%89%E6%BB%91%E9%93%B0%E9%93%BE%E9%93%B0%E5%9C%A8%E7%AB%96%E7%9B%B4%E5%A2%99%E4%B8%8A%2C%E5%8F%A6%E4%B8%80%E7%AB%AF%E8%A3%85%E4%B8%80%E8%BD%BB%E5%B0%8F%E5%85%89%E6%BB%91%E6%BB%91%E8%BD%AE%2C%E9%87%8D%E5%8A%9B+%E7%9A%84%E7%89%A9%E4%BD%93%E9%80%9A%E8%BF%87%E6%91%86%E7%BA%BF%E7%BB%8F%E6%BB%91%E8%BD%AE%E7%B3%BB%E4%BA%8E%E5%A2%99%E4%B8%8AA%E7%82%B9%2C%E5%B9%B3%E8%A1%A1%E6%97%B6OA%E6%81%B0%E5%A5%BD%E6%B0%B4%E5%B9%B3%2C%E7%8E%B0%E5%B0%86A%E7%82%B9%E6%B2%BF%E7%9D%80%E7%AB%96%E7%9B%B4%E5%A2%99%E5%90%91%E4%B8%8A%E7%BC%93%E6%85%A2%E7%A7%BB)
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