高一物理题,请帮忙详细解答一下,谢谢!如图所示,PQ是一根不均匀的直棒,全长4m,用两根细绳吊成水平状态,α=60°,β=30°,则棒的重心到P点的距离是( )A. 1m B. 2m C. 3m D
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![高一物理题,请帮忙详细解答一下,谢谢!如图所示,PQ是一根不均匀的直棒,全长4m,用两根细绳吊成水平状态,α=60°,β=30°,则棒的重心到P点的距离是( )A. 1m B. 2m C. 3m D](/uploads/image/z/12968162-26-2.jpg?t=%E9%AB%98%E4%B8%80%E7%89%A9%E7%90%86%E9%A2%98%2C%E8%AF%B7%E5%B8%AE%E5%BF%99%E8%AF%A6%E7%BB%86%E8%A7%A3%E7%AD%94%E4%B8%80%E4%B8%8B%2C%E8%B0%A2%E8%B0%A2%21%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2CPQ%E6%98%AF%E4%B8%80%E6%A0%B9%E4%B8%8D%E5%9D%87%E5%8C%80%E7%9A%84%E7%9B%B4%E6%A3%92%2C%E5%85%A8%E9%95%BF4m%2C%E7%94%A8%E4%B8%A4%E6%A0%B9%E7%BB%86%E7%BB%B3%E5%90%8A%E6%88%90%E6%B0%B4%E5%B9%B3%E7%8A%B6%E6%80%81%2C%CE%B1%3D60%C2%B0%2C%CE%B2%3D30%C2%B0%2C%E5%88%99%E6%A3%92%E7%9A%84%E9%87%8D%E5%BF%83%E5%88%B0P%E7%82%B9%E7%9A%84%E8%B7%9D%E7%A6%BB%E6%98%AF%EF%BC%88++++++++%EF%BC%89A.+++1m+++++++++B.+++2m+++++++++C.+++3m+++++++++D)
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