大家好 我對下圖的第八題有疑問. 有點搞不太清楚.
http://ppt.cc/1mh0 解答本的答案是選擇(A)
希望能有人幫助我釐清我的觀念
以下是我的疑問:
1.全程的平均速率 與 任何時段的平均速率差別在哪呢?
2.關於B選項,我覺得很怪,任何時段的平均速率均相等只能告訴我們任何時段的速率
大小相等,並沒有辦法告訴我們方向都是一樣的呀,也許0S到1S的速率大小為2,方向
向右,但1S到2S的速率大小為2,但方向向左,這樣的情況都是等速率,但不等速度呀(方向
不同).
謝謝大家
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