用30cm长的细线将质量为4×10-3 kg的带电小球 P 悬挂在O点的正下方,当空间加水平向右,大小为1×10 4 N/C的匀强电场时,细线偏转37°后小球处在静止状态,如图所示.(取g=10m/s2)(sin37°= 0.6 ,cos37°= 0.8)问
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![用30cm长的细线将质量为4×10-3 kg的带电小球 P 悬挂在O点的正下方,当空间加水平向右,大小为1×10 4 N/C的匀强电场时,细线偏转37°后小球处在静止状态,如图所示.(取g=10m/s2)(sin37°= 0.6 ,cos37°= 0.8)问](/uploads/image/z/13802601-57-1.jpg?t=%E7%94%A830cm%E9%95%BF%E7%9A%84%E7%BB%86%E7%BA%BF%E5%B0%86%E8%B4%A8%E9%87%8F%E4%B8%BA4%C3%9710-3+kg%E7%9A%84%E5%B8%A6%E7%94%B5%E5%B0%8F%E7%90%83+P+%E6%82%AC%E6%8C%82%E5%9C%A8O%E7%82%B9%E7%9A%84%E6%AD%A3%E4%B8%8B%E6%96%B9%2C%E5%BD%93%E7%A9%BA%E9%97%B4%E5%8A%A0%E6%B0%B4%E5%B9%B3%E5%90%91%E5%8F%B3%2C%E5%A4%A7%E5%B0%8F%E4%B8%BA1%C3%9710+4+N%2FC%E7%9A%84%E5%8C%80%E5%BC%BA%E7%94%B5%E5%9C%BA%E6%97%B6%2C%E7%BB%86%E7%BA%BF%E5%81%8F%E8%BD%AC37%C2%B0%E5%90%8E%E5%B0%8F%E7%90%83%E5%A4%84%E5%9C%A8%E9%9D%99%E6%AD%A2%E7%8A%B6%E6%80%81%2C%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA.%28%E5%8F%96g%3D10m%2Fs2%29%28sin37%C2%B0%3D+0.6+%2Ccos37%C2%B0%3D+0.8%29%E9%97%AE)
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