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範例：位置-時間關係式與速度

某運動體之位置與時間關係為x=2t2-4t+3 (x:米,t:秒),則: (1)最初此物體離原點多遠?(2)t=0之瞬時速度為何? (3)何時離原點最近?其距離若干? (4)0~4秒內物體的平均速度及平均速率各為何?

 
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Posted in 位移與速度.

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By admin – 2010 年 07 月 29 日

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