高一物理题(关于功率和功)1.用F=25N的力,从静止开始竖直向上拉一个物体,使该物体匀加速上升,已知t=2s末物体的速度为5m/s,求2s内力F的平均功率2.质量为m的列车以恒定功率P在平直轨道上行
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![高一物理题(关于功率和功)1.用F=25N的力,从静止开始竖直向上拉一个物体,使该物体匀加速上升,已知t=2s末物体的速度为5m/s,求2s内力F的平均功率2.质量为m的列车以恒定功率P在平直轨道上行](/uploads/image/z/2597509-37-9.jpg?t=%E9%AB%98%E4%B8%80%E7%89%A9%E7%90%86%E9%A2%98%EF%BC%88%E5%85%B3%E4%BA%8E%E5%8A%9F%E7%8E%87%E5%92%8C%E5%8A%9F%EF%BC%891.%E7%94%A8F%3D25N%E7%9A%84%E5%8A%9B%2C%E4%BB%8E%E9%9D%99%E6%AD%A2%E5%BC%80%E5%A7%8B%E7%AB%96%E7%9B%B4%E5%90%91%E4%B8%8A%E6%8B%89%E4%B8%80%E4%B8%AA%E7%89%A9%E4%BD%93%2C%E4%BD%BF%E8%AF%A5%E7%89%A9%E4%BD%93%E5%8C%80%E5%8A%A0%E9%80%9F%E4%B8%8A%E5%8D%87%2C%E5%B7%B2%E7%9F%A5t%3D2s%E6%9C%AB%E7%89%A9%E4%BD%93%E7%9A%84%E9%80%9F%E5%BA%A6%E4%B8%BA5m%2Fs%2C%E6%B1%822s%E5%86%85%E5%8A%9BF%E7%9A%84%E5%B9%B3%E5%9D%87%E5%8A%9F%E7%8E%872.%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E5%88%97%E8%BD%A6%E4%BB%A5%E6%81%92%E5%AE%9A%E5%8A%9F%E7%8E%87P%E5%9C%A8%E5%B9%B3%E7%9B%B4%E8%BD%A8%E9%81%93%E4%B8%8A%E8%A1%8C)
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