如图所示,一绝缘木板靠在光滑竖直墙面上,质量为m的板,长为L,木板右下方有一质量为2m电荷量为+q的小滑块,滑块与木板间的动摩擦因数为μ,木板与滑块处在场强大小为E=4mg/q的匀强电场中,电场
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![如图所示,一绝缘木板靠在光滑竖直墙面上,质量为m的板,长为L,木板右下方有一质量为2m电荷量为+q的小滑块,滑块与木板间的动摩擦因数为μ,木板与滑块处在场强大小为E=4mg/q的匀强电场中,电场](/uploads/image/z/5206998-30-8.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E4%B8%80%E7%BB%9D%E7%BC%98%E6%9C%A8%E6%9D%BF%E9%9D%A0%E5%9C%A8%E5%85%89%E6%BB%91%E7%AB%96%E7%9B%B4%E5%A2%99%E9%9D%A2%E4%B8%8A%2C%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E6%9D%BF%2C%E9%95%BF%E4%B8%BAL%2C%E6%9C%A8%E6%9D%BF%E5%8F%B3%E4%B8%8B%E6%96%B9%E6%9C%89%E4%B8%80%E8%B4%A8%E9%87%8F%E4%B8%BA2m%E7%94%B5%E8%8D%B7%E9%87%8F%E4%B8%BA%2Bq%E7%9A%84%E5%B0%8F%E6%BB%91%E5%9D%97%2C%E6%BB%91%E5%9D%97%E4%B8%8E%E6%9C%A8%E6%9D%BF%E9%97%B4%E7%9A%84%E5%8A%A8%E6%91%A9%E6%93%A6%E5%9B%A0%E6%95%B0%E4%B8%BA%CE%BC%2C%E6%9C%A8%E6%9D%BF%E4%B8%8E%E6%BB%91%E5%9D%97%E5%A4%84%E5%9C%A8%E5%9C%BA%E5%BC%BA%E5%A4%A7%E5%B0%8F%E4%B8%BAE%3D4mg%2Fq%E7%9A%84%E5%8C%80%E5%BC%BA%E7%94%B5%E5%9C%BA%E4%B8%AD%2C%E7%94%B5%E5%9C%BA)
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