记时器的频率是50HZ.O点是地一个点中间还有2个点到A点,O到A点中间断开了,ABCDE是5个连续的点,O到A距离是69CM,O到C是84.24CM,O到E是101CM,重物是0.3KG,问物体到达C点时重力势能减少了多少?48怎么得
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![记时器的频率是50HZ.O点是地一个点中间还有2个点到A点,O到A点中间断开了,ABCDE是5个连续的点,O到A距离是69CM,O到C是84.24CM,O到E是101CM,重物是0.3KG,问物体到达C点时重力势能减少了多少?48怎么得](/uploads/image/z/14463607-31-7.jpg?t=%E8%AE%B0%E6%97%B6%E5%99%A8%E7%9A%84%E9%A2%91%E7%8E%87%E6%98%AF50HZ%EF%BC%8EO%E7%82%B9%E6%98%AF%E5%9C%B0%E4%B8%80%E4%B8%AA%E7%82%B9%E4%B8%AD%E9%97%B4%E8%BF%98%E6%9C%892%E4%B8%AA%E7%82%B9%E5%88%B0A%E7%82%B9%2CO%E5%88%B0A%E7%82%B9%E4%B8%AD%E9%97%B4%E6%96%AD%E5%BC%80%E4%BA%86%2CABCDE%E6%98%AF5%E4%B8%AA%E8%BF%9E%E7%BB%AD%E7%9A%84%E7%82%B9%2CO%E5%88%B0A%E8%B7%9D%E7%A6%BB%E6%98%AF69CM%2CO%E5%88%B0C%E6%98%AF84.24CM%2CO%E5%88%B0E%E6%98%AF101CM%2C%E9%87%8D%E7%89%A9%E6%98%AF0.3KG%2C%E9%97%AE%E7%89%A9%E4%BD%93%E5%88%B0%E8%BE%BEC%E7%82%B9%E6%97%B6%E9%87%8D%E5%8A%9B%E5%8A%BF%E8%83%BD%E5%87%8F%E5%B0%91%E4%BA%86%E5%A4%9A%E5%B0%91%3F48%E6%80%8E%E4%B9%88%E5%BE%97)
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