一道小船渡河的问题设河面宽为180m,水流速度v1=2.5m/s,一船以相对于河水的速度v2=1.5m/s渡河,若要使船渡河位移最短,应如何调整船的航向?最短位移多大,需时多少?
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![一道小船渡河的问题设河面宽为180m,水流速度v1=2.5m/s,一船以相对于河水的速度v2=1.5m/s渡河,若要使船渡河位移最短,应如何调整船的航向?最短位移多大,需时多少?](/uploads/image/z/14244817-49-7.jpg?t=%E4%B8%80%E9%81%93%E5%B0%8F%E8%88%B9%E6%B8%A1%E6%B2%B3%E7%9A%84%E9%97%AE%E9%A2%98%E8%AE%BE%E6%B2%B3%E9%9D%A2%E5%AE%BD%E4%B8%BA180m%2C%E6%B0%B4%E6%B5%81%E9%80%9F%E5%BA%A6v1%3D2.5m%2Fs%2C%E4%B8%80%E8%88%B9%E4%BB%A5%E7%9B%B8%E5%AF%B9%E4%BA%8E%E6%B2%B3%E6%B0%B4%E7%9A%84%E9%80%9F%E5%BA%A6v2%3D1.5m%2Fs%E6%B8%A1%E6%B2%B3%2C%E8%8B%A5%E8%A6%81%E4%BD%BF%E8%88%B9%E6%B8%A1%E6%B2%B3%E4%BD%8D%E7%A7%BB%E6%9C%80%E7%9F%AD%2C%E5%BA%94%E5%A6%82%E4%BD%95%E8%B0%83%E6%95%B4%E8%88%B9%E7%9A%84%E8%88%AA%E5%90%91%3F%E6%9C%80%E7%9F%AD%E4%BD%8D%E7%A7%BB%E5%A4%9A%E5%A4%A7%2C%E9%9C%80%E6%97%B6%E5%A4%9A%E5%B0%91%3F)
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