如图所示,质量m1=0.1 kg,电阻R1=0.3 Ω,长度l=0.4 m的导体棒ab横放在U形金属框架上.框架质量m2=0.2 kg,放在绝缘水平面上,与水平面间的动摩擦因数μ=0.2.相距0.4 m的MM′、NN′相互平行,电阻不
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![如图所示,质量m1=0.1 kg,电阻R1=0.3 Ω,长度l=0.4 m的导体棒ab横放在U形金属框架上.框架质量m2=0.2 kg,放在绝缘水平面上,与水平面间的动摩擦因数μ=0.2.相距0.4 m的MM′、NN′相互平行,电阻不](/uploads/image/z/11658585-57-5.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E8%B4%A8%E9%87%8Fm1%EF%BC%9D0.1+kg%2C%E7%94%B5%E9%98%BBR1%EF%BC%9D0.3+%CE%A9%2C%E9%95%BF%E5%BA%A6l%EF%BC%9D0.4+m%E7%9A%84%E5%AF%BC%E4%BD%93%E6%A3%92ab%E6%A8%AA%E6%94%BE%E5%9C%A8U%E5%BD%A2%E9%87%91%E5%B1%9E%E6%A1%86%E6%9E%B6%E4%B8%8A%EF%BC%8E%E6%A1%86%E6%9E%B6%E8%B4%A8%E9%87%8Fm2%EF%BC%9D0.2+kg%2C%E6%94%BE%E5%9C%A8%E7%BB%9D%E7%BC%98%E6%B0%B4%E5%B9%B3%E9%9D%A2%E4%B8%8A%2C%E4%B8%8E%E6%B0%B4%E5%B9%B3%E9%9D%A2%E9%97%B4%E7%9A%84%E5%8A%A8%E6%91%A9%E6%93%A6%E5%9B%A0%E6%95%B0%CE%BC%EF%BC%9D0.2.%E7%9B%B8%E8%B7%9D0.4+m%E7%9A%84MM%E2%80%B2%E3%80%81NN%E2%80%B2%E7%9B%B8%E4%BA%92%E5%B9%B3%E8%A1%8C%2C%E7%94%B5%E9%98%BB%E4%B8%8D)
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