一个物体做变速直线运动.前一半以4m/s.后半程以6m/s
一个物体做变速直线运动.前一半以4m/s.后半程以6m/s
公式写出来!我忘记了
公式写出来!我忘记了
物理人气：975 ℃时间：2019-08-22 13:36:49
优质解答
平均速度=S/t=S/(S/(2*4m/s)+(S/(2*6m/s))=4.8m/s
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