[DSE物理2018] Physics討論區

89 回覆
8 Like 10 Dislike
2018-03-29 10:12:06
2018-03-29 12:19:55
你睇joint-us本solution
好似佔左成頁紙

我個人偏向盡量少用公式去推導,你睇下上面嗰頁明唔明。唔明再問

呢題我覺得係DSE最難嗰條MC
2018-03-29 12:27:29
想問吓自修Physics 條curve 高唔高?
利申垃圾asso工程仔一個,諗住冇use physics offer嘅話就去報DSE
2018-03-29 12:31:17
EAA話自修生同係用番日校條curve
2018-03-29 18:47:32
想問2017 sq第5條
點解個力圖 friction係向中間?

佢圍住中間轉,唔係應該有枝離心力向中間而friction向外面,先會令到個茶煲唔郁咩?

如果跟marking scheme咁畫,咁個茶煲咪有net force囉
2018-04-05 23:07:20
Aristo 份Mock係上年出,應該係跟新嘅syllabus
但份Mock仲有our-C野(Hall effect)

Radian MC Mock 有分三個level
Lv3真係太難

其實坊間咁多份mock真係得Pan Lloyd’s樂思正常少少
不過,如果可以買到2016-2017版,就唔好買2017-2018版(上年嗰份正常d)
2018-04-05 23:14:27
如果你未學好好DSE野,就唔好學d out-C野住。
一般而言,friction oppose the motion。
詳細d講,friction opposes the tendency of change of motion between two contacting surfaces。

如果無friction,the object tends to move on a straight line,相對嗰center就會向外(意思係遠離左嗰center),所以friction 向住center

一般,老師/出面教嘅方法,
The object undergoes a circular motion.
There must be a net force (centripetal force) towards center. Since the friction is the only force parallel to the table, it must be towards center
但咁解釋其實係倒果為因,知道左結果,先判斷嗰因,但如果你上面解釋唔明,就用呢個黎解釋
2018-04-05 23:17:47
MC有用
LQ要寫Steps,但你計算過程可以飛Steps

2018-04-05 23:29:32
2018-04-05 23:31:16
連登仔個個青大n展
呢d咁簡單邊會難到佢地
2018-04-06 13:31:20
YL 物理Physics Miss Wong
2018-04-06 13:32:24
有諗過拍晒所有DSE past paper解題,下年會做
2018-04-06 13:59:06
巴打我明個voltmeter ideal
有infinite resistance
咁個equivalent resistance 就好大啦
咁個voltmeter reading increase
但係我唔明個ammeter
2018-04-06 14:06:26
Current Divider
Voltmeter 有infinite resistance, 如果R2 open, 所有電流流向Ammeter
2018-04-06 14:17:31
所有電流流向ammeter 嘅原因
係咪因為R2條branch 嘅V 無限大
咁佢嘅I就好細
所以R1條branch 嘅I就相應increase?
2018-04-06 14:47:22
F=ma都無包括電

呢條先係包晒DSE Phy
2018-04-07 17:59:02
Experiment 題點溫 做past paper 每次都唔識做
2018-04-07 18:07:13
應該係將所有energy form 加埋一齊既total energy?
2018-04-10 20:45:22
想求4 有啲咩一定要識
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