某人由甲鎮欲至乙鎮,先以v之速率行全程的1/3,欲使全程之平均速率為2v,則其餘路程之速率為若干?
[方法一]
[方法二]
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某人由甲鎮欲至乙鎮,先以v之速率行全程的1/3,欲使全程之平均速率為2v,則其餘路程之速率為若干?
[方法一]
[方法二]
Posted in 位移與速度.
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By admin – 2010 年 07 月 29 日
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