※ 引述《chickenkai (chicken)》之銘言：
: 有個物理問題想請教各位前輩，想了很久還是想不出來！
: If a rock is thrown upward on the planet Mars with a velocity of 10 m/s,
: its height in meters seconds later is given by y=10t-1.86t2 .
: Find the average velocity over the time interval [1, 2].
: 答案是3.38
: 為何？
[1, 2]的位移
y(2)-y(1)=(10*2-1.86*2^2)-(10-1.86)=4.42
怪耶 我算出來是4.42
答案有錯嗎
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