两个物体的质量之比是5:4,受到的重力之比是__________;一个冬瓜重40N,它的质量是________kg.(g取10N/kg)
人气：204 ℃ 时间：2019-08-20 04:29:09
解答
这个公式.G=mg=10m
两个物体的质量之比是5:4,受到的重力之比是5:4;一个冬瓜重40N,它的质量是4kg.(g取10N/kg)
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