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設初速度為V0,末速度為V,中間位置速度為V(1/2),由x=V0t+1/2at²;和V=V0+at消去t得到:V²;-V0²;=2ax則中間位置:V(1/2)²;-V0²;=ax∴V(1/2)²;-V0²;=(V²;-V0²;)/2∴V(1/2)=√[(V…
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