如图,一辆质量为M、长为L的平板车静止在光滑的水平面上,车上有一质量为m的人,某时刻开始,人从平板车的左端走向右端,求:平板车后退的距离.
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![如图,一辆质量为M、长为L的平板车静止在光滑的水平面上,车上有一质量为m的人,某时刻开始,人从平板车的左端走向右端,求:平板车后退的距离.](/uploads/image/z/4653672-24-2.jpg?t=%E5%A6%82%E5%9B%BE%2C%E4%B8%80%E8%BE%86%E8%B4%A8%E9%87%8F%E4%B8%BAM%E3%80%81%E9%95%BF%E4%B8%BAL%E7%9A%84%E5%B9%B3%E6%9D%BF%E8%BD%A6%E9%9D%99%E6%AD%A2%E5%9C%A8%E5%85%89%E6%BB%91%E7%9A%84%E6%B0%B4%E5%B9%B3%E9%9D%A2%E4%B8%8A%2C%E8%BD%A6%E4%B8%8A%E6%9C%89%E4%B8%80%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E4%BA%BA%2C%E6%9F%90%E6%97%B6%E5%88%BB%E5%BC%80%E5%A7%8B%2C%E4%BA%BA%E4%BB%8E%E5%B9%B3%E6%9D%BF%E8%BD%A6%E7%9A%84%E5%B7%A6%E7%AB%AF%E8%B5%B0%E5%90%91%E5%8F%B3%E7%AB%AF%2C%E6%B1%82%EF%BC%9A%E5%B9%B3%E6%9D%BF%E8%BD%A6%E5%90%8E%E9%80%80%E7%9A%84%E8%B7%9D%E7%A6%BB.)
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