PHYS question!!!!!!!!(就黎集齊一套)

家仁

2008-12-29 5:09 am

travelling by east rail ,the diatance from hung hom terminus to mong kok station is 1.56km.the train accelerates from rest at the hung hom terminus and then decelerates to stop at mong kok station.the acceleration and deceleration are 1.3ms^-2and 2.1ms^-2respectively.

sketch the graph of acceleration against time for the whole journey.
(我剩想知佢其實想叫我畫vt 定at graph?加埋解釋,thz)

更新1:

but書答案係vt graph

更新2:

因我也認為是at graph,為何你不認為書出錯了?

更新3:

new certificate physics1

更新4:

香港教育出版社

回答 (1)

Chau

2008-12-29 6:54 am

✔ 最佳答案

Sketch the graph of acceleration against time for the whole journey.
It means that you should sketch the a-t graph.It is because (a) is simplified form of acceleration.
Acceleration against time graph means that the y-axis is acceleration and the x-axis is time.

2008-12-29 21:29:16 補充：
這樣的話你在發問過程中應該出現了問題,
可能你看錯了答案,或是問題出錯,或是那張是at graph 但你誤以為vt graph

2008-12-31 10:47:53 補充：
這也可能是書出錯的.你果本係咩書黎>?

參考: myself

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