[quote]原帖由 [i]㊣修羅-黑暗㊣[/i] 於 2006-5-6 15:25 發表
咁就應該要學會接受自己"習慣"引黎既後果啦 [/quote]
咁複雜既
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 08:54 PM 發表
唉．．咁多野做ｇａ．．＞＜ [/quote]
有幾多呀？
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 09:06 PM 發表
７～９樣ＨＷ
Ｍｏｎ Ｍａｔｈ ｔｅｓｔ＋Ｃｈｅｍ Ｔｅｓｔ
Ｗｅｎ Ｐｈｙ Ｔｅｓｔ
今日我仲要嘔２篇稿
Ｐｈｙ ＨＷ唔識ａｒ＠... [/quote]
濕濕碎啦呢d野~~:lol
有咩稿呀？
Phy 有咩唔識，問我啦！
今日下晝訓左陣覺，而家鬼咁精神呀~~
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 09:19 PM 發表
濕碎？．．
２篇文＋ＨＷ＋２ｔｅｓｔｓ我唔岩時間ｋｏ ａｒ．．
Ｅ－ｎｅｗｓ ｇｅ稿ａｒ．．
Ｔｏｄａｙ ｉｓ ｔｈｅ ｄｅａｄｌ ... [/quote]
2篇文？我以前成日一晚做3、4篇文tim啦~~
其實係個阿sir一早話做，不過我就堆埋佢地一齊~~:lol
Ｅ－ｎｅｗｓ？咩黎架？
你寫校刊架？
Phy ans：
Apply v^(2)- u^(2)=2as
As they are identical cars, their acceleration should be the same.
For car A, 0-40^(2)=2as
braking distance=-800/a
Similarly, for car B, the braking distance=-3200/a
The required ratio = 800:3200
= 1:4
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 09:29 PM 發表
繼續問．．＝ｖ＝
３）A motor pulls a block on a roughfloor.If the block moves at 30km/h and the power of the motor is 10kW,wt si the frictional force between the ground and the block.
A ... [/quote]
呢題個ans係咪D呀？:lol
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 09:38 PM 發表
中作最好做，１日５篇我都ｏｋ～
（夠唔夠就唔知ｌａ～／．＼）
Ｂｕｔ Ｂｏｏｋ Ｒｅｐｏｒｔ，實用文我冇乜頭緒～／．＼
Ｅ－ｎｅ ... [/quote]
我個時就係做中文詳細book report~~:L做死人~~:L
嘩！勁呀！:boy09::boy09::boy09:
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 09:38 PM 發表
我點知姐～
我本書ｎｏ ａｎｓ ｇａ～／．＼ [/quote]
唔係掛~咁大獲？
我都唔係咁肯定，因為通常都唔會係呢d答案
等我計多陣先~
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 09:47 PM 發表
中文詳細ｂｏｏｋ ｒｅｐｏｒｔ最好做長小說，揚揚灑灑幾百字當作文～
最緊要本書有ｆｅｅｌ～
Ｂｕｔ Ｅ＋做宗教ｂｋ ｒｅｐｏｒｔ｠... [/quote]
我個d係俾佢規定架，做曉風散文集，一篇一個，又要晒時間去睇，重要死係度吹夠字數俾佢
做乜要做宗教book report？你地讀宗教？
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 09:52 PM 發表
1)When the block in Fig is released ,its velocity at B is v.After adjusting the slope,the block moves at 2v at B.Wt is the new height of AC?
A √2h
B 2h
C 4h
D 8h
勞煩寫下Ｓｔ｠... [/quote]
AB有冇變？
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 10:17 PM 發表
計到ｍａ？＝ｖ＝ [/quote]
全部都計唔到~~:lol
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 10:38 PM 發表
咁難？＝ｏ＝ [/quote]
係呀~真係好難
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 09:52 PM 發表
1)When the block in Fig is released ,its velocity at B is v.After adjusting the slope,the block moves at 2v at B.Wt is the new height of AC?
A √2h
B 2h
C 4h
D 8h
勞煩寫下Ｓｔ｠... [/quote]
Apply v^(2)-u^(2)=2as
Let the mass of the block is 1, and the weight is 10
For case 1, 10sinx=ma(1)......(1)
h/s=sinx
v^(2)=2a(1)s
V^(2)/2s=a(1)
For case 2, 10siny=ma(2).........(2)
h(new)/s=siny
(2v)^(2)=2a(1)s
2v^(2)/s=a(2)
a(2)/4=a(1)
a(2)=4a(1)
(2)/(1):siny/sinx=4
h(new)=4h
ans:C
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 10:58 PM 發表
:boy09:好勁ａｒ～
我都唔知發生咩事．．＝ｖ＝ [/quote]
我都俾d xy搞到亂晒~~:boy07:
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 11:04 PM 發表
[/quote]
10sinx=ma(1)......(1)
a(1)即係第一個case既final acceleration，因為打唔到a下面加個細1，所以咁打
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 09:56 PM 發表
2)The Abyss Turbo Drop (跳樓機)at the Ocean Park lifts passengers to 56.4 m above the ground in 20s.
Assume that its paltform where passengers sit has a mass of 120 kg.
How much power of the m ... [/quote]
Power
=weight x displacement / time
=120x10 x 56.4 / 20
=3384W
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 11:15 PM 發表
[/quote]
打錯左~~係2
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 11:18 PM 發表
呢條ＭＣ～＝ｖ＝
Ａ ３．３８ｋＷ
Ｂ １２．３ｋｗ
Ｃ ２２．６ｋＷ
Ｄ ４５．１ｋＷ [/quote]
即係A
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 10:07 PM 發表
３）Ｓｔｅｐｈｅｎ ｐｕｓｈｅｓ ａ ｂａｌｌ ｂｅａｒｉｎｇ ｏｆ ０．１ ｋｇ ｓｌｉｇｈｔｌｙ ｏｎ ａ ｓｍｏｏｔｈ ｒａｉ ... [/quote]
答案應該係B~~
我唔知C講乜
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 11:23 PM 發表
是但ｌａ．．＞＜
仲有好多．．＞＜ [/quote]
有幾多？
我盡力解
[quote]原帖由 [i]＊晞兒∼[/i] 於 2006-5-6 11:28 PM 發表
後面仲有５條ＭＣ＋２條Ｌｏｎｇ ｑｕｅｓｔｉｏｎ．．＞＜
做到我個腦唔識轉．．＞＜ [/quote]
講黎聽下~~