帮小弟问的高中物理题,急!需要解释.1、一物体被竖直上抛,所受空气阻力大小恒为重力的1/5,g取10m/s2.若物体经5s落回原处,则物体的上升时间为_______s2、如图所示,一根长为3L,质量为m的导体棒折
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![帮小弟问的高中物理题,急!需要解释.1、一物体被竖直上抛,所受空气阻力大小恒为重力的1/5,g取10m/s2.若物体经5s落回原处,则物体的上升时间为_______s2、如图所示,一根长为3L,质量为m的导体棒折](/uploads/image/z/7808058-18-8.jpg?t=%E5%B8%AE%E5%B0%8F%E5%BC%9F%E9%97%AE%E7%9A%84%E9%AB%98%E4%B8%AD%E7%89%A9%E7%90%86%E9%A2%98%2C%E6%80%A5%21%E9%9C%80%E8%A6%81%E8%A7%A3%E9%87%8A.1%E3%80%81%E4%B8%80%E7%89%A9%E4%BD%93%E8%A2%AB%E7%AB%96%E7%9B%B4%E4%B8%8A%E6%8A%9B%2C%E6%89%80%E5%8F%97%E7%A9%BA%E6%B0%94%E9%98%BB%E5%8A%9B%E5%A4%A7%E5%B0%8F%E6%81%92%E4%B8%BA%E9%87%8D%E5%8A%9B%E7%9A%841%2F5%2Cg%E5%8F%9610m%2Fs2.%E8%8B%A5%E7%89%A9%E4%BD%93%E7%BB%8F5s%E8%90%BD%E5%9B%9E%E5%8E%9F%E5%A4%84%2C%E5%88%99%E7%89%A9%E4%BD%93%E7%9A%84%E4%B8%8A%E5%8D%87%E6%97%B6%E9%97%B4%E4%B8%BA_______s2%E3%80%81%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E4%B8%80%E6%A0%B9%E9%95%BF%E4%B8%BA3L%2C%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E5%AF%BC%E4%BD%93%E6%A3%92%E6%8A%98)
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