一人坐在雪橇上，从静止开始沿着高度为15m的斜坡滑下，到达底部时

一人坐在雪橇上，从静止开始沿着高度为15m的斜坡滑下，到达底部时速度为10m／s.人和雪橇的总质量为60kg，下滑过程中克服阻力做的功等于多少(g取10m／s²).

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答案:6×10³

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