Mechanics 10分 THX

dom123

2007-10-13 12:55 am

In converting a tape into a tape chart,the tape is cut into lengths containing equal tick intervals.
哪個是對
(1) The length of each tape represents the average velocity within the time interval.
(2) The width of the tape represents the constant interval
(3) Joining the centres of the tops of the tape gives a displacement-time graph
A (2) only
B (3) only
C (1) and (2) only
D (1) and (3) only
Ans. is C
(1) 的 length 不是 displacement over that time period嗎?
(2) 的 width 係指打直定打橫既長度
請解釋一下答案

回答 (1)

benny wong

2007-10-13 6:27 am

✔ 最佳答案

containing equal tick intervals.即係指同一段時間,因為每個tick interval都係一樣,一樣咁多個,即係time interval一樣
1.佢的length是 displacement over that time period
咁displacement over 一個time interval,就係velocity\
2.個width係指打橫果個,因為打橫果個指出ge就係個displacement

參考: me

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