2010-11-01 11:13:46
2009-09-28 00:44:59
2009-09-26 23:49:34
如果物体做匀变速直线运动，S1，S2Sn为其在连续相等时间内的位移，a为其加速度，T为相等时间间隔值，则有假如用相邻的距离之差S1，S2Sn-1分别除以T2，再取其平均
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