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逐差法求加速度麼? a=(s6+s5+s4-s3-s2-s1)/(9T^2) 一般都是用這個.s1.s2.s3……s6是第1.2.3……6個時間間隔內的位移. 但是要抓住根本就是△s=aT^2.T是時間間隔.取6段是保證誤差小.
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