[情報] 普物習題 (for those who are still without a textbook...)

[marcoii (天邊一朵雲)]

04. The 1992 world speed record for a bicycle(human powered vehicle) was set
by Chris Huber. His time through the measured 200m stretch was a sizzling
6.509s, at which he commented, "Cogito ergo zoom!" (I think, therefore I go
fast!). In 2001, Sam Whittingham beat Huber's Record by 19.0 km/h. What was
Whittingham's time through the 200 m ?

10. Panic escape. Figure 2-22 shows a general situation in which a stream of
people attempt to escape through an exit door that turns out to be locked.
The people move toward the door at speed Vs = 3.50 m/s, are each d = 0.25 m
in depth, and are seperated by L = 1.75 m. The arrangement in Fig. 2-22
occurs at time t = 0.
    (a) At what average rate does the layer of people at the door increase?
    (b)At what time does the layer's depth reach 5.0m?
    (The answers reveal how quickly such a situation becoms dangerous.)


Fig. 2-22:
  |← L →|d|← L →|d|← L →|d|← L →|d|← L →|d|← L →|d
_________________________________________________________________
                                                                 |
 人       人        人        人        人        人        人   | ←封死的
_________________________________________________________________|   逃生門

 L : 人與人的間隔

 d : 人的「厚度」(翻的好怪 = =")

 (注: 這題真的滿生活化的, 尤其是算完後就知道逃生梯放置物品真的會害死人...)
30. A world's land speed record was set by Colonel John P. Stapp when in
March 1954 he rode a rocket-propelled sled that moved along a track at
1020km/h. He and the sled were brought to a stop in 1.4s.(See Fig. 2-7 ←圖不
重要) In terms of g(重力加速度, 打不出斜體字 :p ), what acceleration did he
experience while stopping?


CH3
                                →
35. Three vectors are given by  a = (3, 3, -2)
                                →
                                b = (-1, -4, 2)
                                →
             →  →  →         c = (2, 2, 1)
    Find (1) a‧(b X c)
             →  →  →
         (2) a‧(b + c)
             →   →  →
         (3) a X (b + c)

72. A fire ant, searching for hot sauce in a picnic area, goes through three displacements along level ground:

    →
    d1 for 0.40m southwest
    →
    d2 for 0.50m due east
    →
    d3 for 0.60m at 60 degree north of east.

 Let the positive x direction be east and the positive y direction be north.

 What are   (a) the x component and
                                   →
            (b) the y component of d1 ?

 What are   (c) the x component and
                                   →
            (d) the y component of d2 ?

 What are   (e) the x component and
                                   →
            (f) the y component of d3 ?

 What are   (g) the x component,

            (h) the y component,

            (i) the magnitude, and

            (j) the direction of the ant's net displacement ?

 If the ant is to return directly to the starting point,

            (k) how far and

            (l) in what direction should it move ?

 (這題很煩...)
如果有看不懂的字 也許是我打錯了 請儘快提出~

並請有題目的同學幫忙校對一下~

--

  ★ Mr. wind
     http://meteorologytoday.googlepages.com/mr.wind

    (天氣資訊連結總整理)

--
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◆ From: 59.125.179.32
※ 編輯: marcoii         來自: 59.125.179.32        (09/18 19:41)
推 wartmh:原本我也想打的...
→ wartmh:對邱小姐還有另外幾位要藉超題目的同學感到抱歉(不知你們
→ wartmh:的名字，再次道歉…)，今天中午我先走了…
→ wartmh:喔...是借抄
推 WillowTing:(邱小姐？)不會啦 活大實在太擠了 我們之後也找不到你
推 JFhorner:謝謝同學~辛苦了。
→ toouii:..我整張題目不見....
→ marcoii:回樓樓上 不客氣 回樓上 我汗了...
推 jasonfghx:謝謝陳冠宇
推 jasonfghx:謝謝謝班代
推 lancer1668:班代姓謝w
推 gnezdniwde:大感謝. 去他的習題通通大改版.
推 toouii:ceiba上面有完整題目 還影印課本!