1990-12-10 — Page 7

(7)息訊爍兩 蘭港 日四廿月十年午庚饜夏

開新港本 日四廿月十年午庚麿夏

報日僑華

本

下池灣文娛中心辦 粵曲演唱欣賞晚會

[訊]市政斯特

港

謝蓓珠劉

0 年聖誕舞蹈比賽

亦應點蹈薜友進請作客席络實示板舞蹈i

茜假若持證人的身 不足七改進無「**

符號,領

機相型微金包

售發量限港在

一期星’日十月二十(〇九九一)年九十七國民華中

除全耝一玩限进供品的包余 港「攝肜器材展覽商上,

MINOX LX PLATIN

1. TIN相機,實夸人感到非常興

售 新出品的 MINOX LK PLA

·捷成洋行攝影器材部槽锁,

LX PLATIN SEBAK- 行的排位上將會展出MINOX 鄉豐中心舉行,屆時,捷成洋 於十二百八日銳节大拟香港 相機爲聖誕娆庒槽品,展覽會」

在香港發售。

·国,侯永利相機開生產一千部,並话有少猛

相换理狭小巧,亦懷行政人員:科學家- ,因而亦享譽標「開」白鹰:此外+MINOX

,運動固和記者所樂以採用, MINOX LX PLATIN

IKIAZ :

纳恩亲团求琚甚允近太平绅士致詞,

躜 爲橙色固劓主席黃水牌徐永文助岛

康寧

遊樂場 以便重建

台股市明年向海外開放 日美港券商均有意進軍

人投資股市,回未大戰省亦考慮更

不少香

最佳員工獎

,

直會旅法和中華越港灣一號黃國柱,以示對上 術疎員寀牛顔-又頒發了十月勞作真容

·傅文揚和當忭

頒發了十月份地

病汁的雞雞 GRAND. CAFE:G藏潋

中日會來爲十一月份生日的員工慶號; - 壓軸則爲一小 各部門主釬到致賀

陸市場變化莫

濟専家深表憂慮

獲鄉鎮之星稱號

凡 孟姜女「長城」尋夫

·逆化莫丽的阿內市場進 桓・使得郤濟界天對:

藏

後期國民經惴進行治理九年下半年起

從將證過程「貝基本九朮世仍然平

找王一香]語的農副產品和工業黃消費方式明当改變 更加微博多彩,無統於改游收入的增多

中國市場商隤货源總額 產

捷成塑行在香港成立九十五作,除了市

高十七米,重量一千公斤 港外,業務範的更遍及中國和東南

帝苑酒店巨型聖誕樹

XL NNOX:相視一樣,沒有最近過的科技

→B+MINOX LX PLAT:IN ERK

i捷成洋行亦將岛出全系列的背得相機,以及

六乎克,機身用染製造,並包以黃色及白

IHRŽMINOX LX PLATIN ZIK

ROLLEIFLEX 2.8GX EDITION,

攝影器材展近者的推。 洒,秋迎各界大上朝來參慰他們在香港,分 「開滿」相機以至大乘六專業相做等,一鼴張 相機-適合任何愛攝影的人垛用,由微型的 ,黹器材噐與經理向牠送示,让內低氟的

|捷成洋行爲说描版大的易集團,钙塔营案 器材部世代洋行 八部門之一,

系列等專業攝影也。

HECABLITZ 阿拉亦出 光系統以及世界各地攝影記者痨诼課用的 时风光燈- 模蜊MULTIBLITZ 製造的專業閃 此外,由瑞典PROFOTO .製造的影席事

璷各類產品和服務,

1

SL66

豪華晚宴迎貴賣

-六)假尖東香格里拉大酒財舉行「花

生王亮燈儀式。 ・日米驻卷打饼事人宮先生,聯同專昆山一

備上,該公司主席張人龍示,二世下韩

同一方间不断努力,

·福腊潔、要棄的城市目標,不捕製造品、

十周年,凡慈、隙、川各工業精特爾,作為中國經济改革

性能候乌息的廣則第2天,

第立

一候

澳南島大一第粤 區護保鳥候立設

拷公司與特州犁這個值得紀念的晚上,對

憑得大巨榧污小姐站

四萬顆燈飾燦爛奪

菜,各干禮

)有限公司主席張大腿太平紳士,立法局首席

本港獨二張二的室內花生帝酒工程造 撇花畫話,承先在其十六樓至四樓。 ,尖沙咀東部中心|金屬飾線

鸿:帝苑ˊ店之世卫生誕樹 萬媒開燈鎭及九千米,主席市湘主持亮燈

自一九八一年川業以來成。亮儀式於 遺一下公斤,樹身山西鸿基地產發展有限公司

·從未閉斷,今年的唯一三十日下午六時俶 誕樹,高十七出五米,室內花疑舉行,並出新

越南的列些甚至九個島嶼作秒被衝區

公務員

兩岸訊息)

深圳作

推行公務員制度

閲家公務員制度的地方綜合試點 古家人下都在進;使深川成為繼哈爾酒後,中段第二個進行

播政府著繞四二二個委娩局及其选国

制定機構的管理職能及內設機構散日和噶定人目,以应位 第二季选钷精虢段,對試點工作進行全面檢計可拖待 微分人過波及建立包括公務員工資排

1991 中學會考預習專欄

二明德出版社

· MILE DALE PRESS.

Physics (11)

CY: Mak

Exercise 11 Force and Acceleration (1) (where recessary take 46:10 hs-2.

A`10kg: block is supported by chrd and pulind upwards witman. acceleration 2 ms.

(a) what is the tension in the curd (b) After the block has been set n

motion, the tension in the cord as reduced to 100 N. What sort of mation will the block perform?

the curd is now sacked Completely, the flock' is observed to move up 5 meters further before

· Cuming to rest. With what valocity just before stackened) was it traveling?

2. Figure 15 men of mass 80 kg stands on a platform of mass 40 kg: He pulls a rope which is fastonod to the platform and runs over a frictionless pulley on the ceiling. The platform is observed to "move upward with acceleration 1. s Find

(a) the tension in the rope, and

(b) the reaction from the platfor

HONG KO

4

Figure

It the systems and released,

(af determine the acceleration of 'the'

syston,

(5) Find the tension in the string. (c) find the velocity with which the

15 kg block strikes the floor,

(d) find the time, required for the 15 kg,block to reach the floor, and (e) Find the maximum height reached by

the 10 kg black,

An agtimediane AR 100 m long a is ca the ground and A is

above the ground, (as shown in. figure 3). A block 4 at A is, allowed to slide down from rest, the veincity-time graph is as stubwi in fiqurd 4.

Figure 3

Time in second

Figure 4

m

∙Figure

Platform

3. Two blocks of mass 10 kg and 15 kg. are connected by a Fight

„over a smaoth fixed pulloy). Initially, the 11 ky block rests Di the horizontal, flour and the 15 kg is held 4 metres above the floor as shown in figure 2.

(a) What is the linear acceleration of.

(b) Find the total time taken for the

block to reach 0.

(c) Find the velocity of the block at

(d) Given that the mass of 8 is 2 kg,

find tile frictional force between the pinck and the inskinad plane

AB

Solutions

As shown in the force t

diagram,

1. Ler tension in the curu iek

vardcceleration of the h

m-mass of the block-10 ka

Apply YewLon's 2nd law

consider the forces act, on the man

reaction exerting on the man."

Apply Neaton's 2nd law

RTmg ma

R. 60 - 800 - 80(1.5)

(a) t = 10)(10) - (10)(2)

T-120 N

(HISTON, than

100 (10)(10) = 10a

a. 0 ms-2 “Thus, the black wil]" ascend m

uniform velocitys.

(c) If the cord is slackened, then

hence.

0 - (10)(10) ? (10)(a) = a = -10 ms2

with

(The negative sign indicates that

the direction of acceleration is downwards)

Apply the formula y2 - út + 2a5

0 = u* + 2(-10)(5)

(a) As shown in the fores diagrams.

T = tension in the rupe

(b)

Weight of the inan and the platfor

(80+40) 8

120 g

Apply Newton's 2nd law

21 - 120 g = (80 × 40)(1.61

2T (120) (10)

180.

(Ans")

IBRARIES

v, velocity of the 15 kg Stock when it strikes the floor

4 ms

Then, the string slackens, assume the block moves ʼn meters farther before drops (down)

42 = 21104

n0.8 m

„, the maximum height reached by

the 10 kg block

(AOR)

(a) Lat the acceleration of the system (a) The linear acceleration of block X

beams, the tension in the string be TN.

Apply Newton's 2nd law to the blocks saperately

| | 15(18) - | = 15d|__ | {1}

(1)+(2)

150 = 250

3+2 ms 2

(b) Substitute the value of a into (21,

we obtain

01 - 120 N

(c) Apply the formula

slope of the linear graph - 2 ms! {b} App}y

(Ans.)

(Ans :)

(Ans)

(c) Let the velocity of block at B be

(ANS)

= j Zaś

*** 2(2)(100)

400

Where 5 5 4 10, y = 0 aus??

bane 2 ms."

**** = 0 + 2(2)(4)

(Ans.1

(Ang(d) Let m mass of the bloolane AB

Thus, the velocity with which the

15 kg block strikes the floor. Is

(d) Apply the formula v → u + at

where

Cans)

(e) As shown in the figure, get the

velocity of the 10 kg black be v when it reaches the dewei她

@ inclination of

The net force acting on " in the direction parallel to the inclined plane 16

mosine f

where frictional force

the nat force is

nasing fe

where 41s the accleration of the block

•*. (2)(10) {~**) • F = (2) (2)

F 8 N (Ans.)

IN THE SUPREME COURT OF H

IN BANKRUPTCY

NO.8712 OF 1890

LAM KOK SUNİ

Ex Parte Oscequ Limited

to the matter pls Be

·an the 21st day bi Sep

TAKE NOTICE that a bankruptcy notice has been Oscipla Litted whose registered bilios in plante, al Tower 9, China Hong Kong City, 39 Canton Road, Hong Kong and the Court has ordered that the send bankruptcy notice together with a sealed copy of th service by leaving at Shop 27, Black 16, Chai Wan E Kong and the publication of the notice in the Wah j Scirculated in Hong Kong shall be deemed to be good.

the bankruptcy notice upon you.

The bankruptcy notice may be inspected by you on j

*To: Lam Kolk Sun

Shop 27, Block 15.

Chal Wan. Estate,

Chai Wan

7 day of DECEMBER 1990.

我招槖岛盛逑市森總署文化事務料提供惠房設計製作及律服務

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