海洋公園新遊戲 3.9G 有幾勁？

[Manchester1314]

好有教育意義,少有喎蘋果.............

雖然我都識講........

[a123456789723]

台灣馬雅探險4.5G....

[bellchan]

on9 physics tutor

[highhand]

佢令我好掛住phy,bio,chem:(

[KuranPhantomhive]

挑戰唔成功會點？

[3345ize]

好驚咩- -我尋日先挽完,都幾好挽丫,不過吾驚,系爽多d囉~

[Jimmy93511]

都唔驚既- -

[eternity00000]

on lun 99, Maximum reaction force must be at the bottom

[monang012]

I played it, its not that scary, and i'm only 12. but it is still exciting =P

[Cujo19760210]

centripetal force!!!

F=mv²/R

The acceleration always to the centre of the circle

The most common examples are electrons surrounding nucleus of every atoms and

8 planets surrounding the sun of our solar systems!!!

Physcis RULES!!!!

[kazuma19e]

其實G即系咩黎？？

[hktyhkfg]

果個翻天覆地真系好刺激 成果向後翻 爽

[MsPrissssssy]

講咩原理啊-v- 玩就玩啦-v-

[theabcd3602]

玩過

好正

[kaikai963]

戈次玩

坐最出戈到

哇 後面D人係到怒叫

D口水係我面前飛過

[tsechun0531]

我玩呢個個陣覺得冇乜野

[fhk846846]

一架飛機都12G la

[hbonline1231]

聽不懂...太深奧

[qwe60231051]

想做太空人咩

[jkming1220]

掟你上太空再等你落返黎果陣...我諗有39G@@

[z258123]

頭果幾野有feel..後面完全無feel!

[FaiKeeZacH]

好玩未得囉~

解釋D咩姐~考PHYSICS呀?

[JANLICE11501]

咁姐係咩?

解釋完之後 3.9G 有幾勁?

[brian151194]

點解我覺得跳樓機離心力勁過佢N倍 ?

[sfa6a]

@brian151194 because the time you experience the acceleration (3G) is longer than the centripetal acceleration (3.9G at the highest point).

[pinkymak93]

實在不太恐怖..不過挺新鮮的..

[nphmagic]

後面個解釋真係好_無聊

[spaceryan1]

個新遊戲玩到我同學係上邊唔係叫係笑= ="

[bbrjrj]

@spaceryan1 哈哈.即笑左;]



[spaceryan1]

@bbrjrj 係xdd

[lo6560]

其實一d都唔恐怖-___-

上去挽係等落黎咁制= =

[Freeman93529]

唉, 叫個補習老師自己玩下=]

[winsin101]

個女仔玩機動遊戲都仲要笑住黎玩扮開心 真係好有體育精神

[yttbbs]

佢犯左好多al phy考生既common mistake. 向心力已經係net force黎

[kolan929]

@yttbbs 無錯無錯, tesion係到只係為佐拆開做centripetal force同normal reaction

因為normal reaction同mg係永遠balance佐, 得番centripetal force會係net force, 所以佢先轉到圈

[andysoxd]

@kolan929 your concepts are completely wrong, just like the tutor in the video.

[MrOyster2010]

~_~ iphone 3.9 G

[joe123123]

物理老屎, 講錯嘢.教壞人.

[koreagirl0x0]

姣婆

[coffee12345100]

到時成架野跌左落尼個陣真系仲好玩~

[HungKinMak]

物理老師亂UP，遲早比人FUK，教壞細路～

[lyf058831]

好明顯果物理老師教錯野....3.9G 其實係講39 MS^-2 ... 真實代表既係人體會感覺到3.9倍既重量... 3.9G只會係到低點發生... 因為這時候剛剛向上加速..同升降機原理差不多.. 下次揾大學既物理講師...= =



[chris2972002]

@lyf058831 下高點唔係人體承受到最大ge力咩? 當T係機器扯你個力 mg係你重量 因為 起高點係機器扯你向個力加自身重量 即係（T+mg), 而低點承受ge力係最細 因為機器扯上ge力減小左你重量， 令你覺得輕左 即係 (T-mg).

果物理老師應該冇講錯-.-

[lyf058831]

@chris2972002

補充:

向外加速只係一個感覺...為何有這個感覺..??? 因為有TENSION 拉你向圓心加速令你有向外被迫出的感覺...

[kolan929]

@chris2972002 最高個點應該係T=mv^2/r - mg先岩

當你係最高個點, 因為你有個mg(向下)係到幫你做centripetal force(向下), 個tension唔洗咁大都夠你轉圈

但當去到最下個點, 有個mg(向下), 抵消佐個centripetal force(向上), Tension(向上)就要大D先可以maintain到個ci­rcular motion

所以最低個點個tesion應該係mv^2 /r + mg 亦即係你感覺到既拉力=mv^2 /r + mg

所以一定係最低個點先有3.9G

[lyf058831]

好明顯果物理老師教錯野....3.9G 其實係講39 MS^-2 ... 真實代表既係人體會感覺到3.9倍既重量... 3.9G只會係到低點發生... 因為這時候剛剛向上加速..同升降機原理差不多.. 下次揾大學既物理講師...= =

[200310663]

條女有G?

[DXPhone001]

尼單野好似係到曬命多d=-=

[langjc12]

其实我怀疑紧距有冇玩到....

[chihuahuabebi]

佢中大物理 1級榮譽畢業,,,,佢仲有博士學位,,,估唔到

[vios688]

哇 個人咁誇張.. 唔暈嫁咩- -

[hkbapkson]

浪費我人生中寶貴o既1分28秒 - -

[geoffreykkok]

@hkbapkson 你屌佢還屌佢 但我最憎人講黎D"浪費咩人生中寶貴幾多秒" 講到好似你D時間秒秒都對個社會好有貢獻咁收皮啦

[SCray1219]

@geoffreykkok

你咪又係抄ming仔~_~

[geoffreykkok]

@SCray1219

MING仔出既片講既野 都係好多香港人都有而認同既念法 只不過佢係YOUTUBE上面表達出黎

抄??? 抄什麼?? 咁不如你話佢抄香港人現有既念法 你都低B  思想都要板權丫?

[719siufan]

@hkbapkson 浪費左我人生中寶貴既12秒黎屌你 屌你 !

[hinzbabii]

你好驚:$ ?!  我見到你個樣仲驚:)

[joe691985]

改成39G會唔會吸引D?



[s204204]

@joe691985 -v- 39G 可能人都扁埋~

[MagnusMas]

@joe691985 你已經死左, 知唔知飛機失事大多數都係因為離心力太大而死

[ccw051a03]

@MagnusMas

飛機失事 何來離心力呀?!

唔好亂講啦-,-

同埋

一個正常人可以抵受到 6G 既力 先會失去知覺 暈低

而戰機 機師更可以 承受到 12 G 

要一個人死

起碼要 20 個G 先得

3.9G 好小事之麻 唔識又係到亂講 教壞細路

[joe691985]

改成39G會唔會吸引D?

[wingtai321]

依個機動 見都未見個

未開放--?

[allatt123]

3.9G唔夠勁

39G先夠勁⊙⊙

[wongwanchap]

OMG現代教育專出on9教師...只係會估題,卻不會做題

[ricklypenspinner]

要5G先好玩

[Rwx009]

0:03我聽到佢講:仆街呀 落番去未呀?

[kbeatboxing]

@Rwx009 你聾左?

[kbeatboxing]

@Rwx009 你聾左?



[doydoydoy]

@Rwx009 你有幻聽?

[wesleygame231]

香港最屌的是3.9G?

台灣5G 的一堆耶....

[thwongterry]

@wesleygame231 nobody gives a fuck about what you have in taiwan

[edwinkuen]

H.L tam, c.w sham or ken chan are way better than the fucking vic chan....he pissed me off

[cxs1023]

In looping the loop,

at the highest point:R1+mg=mrw^2 R1=mrw^2-mg

at the lowest point:R2-mg=mrw^2  R2=mrw^2+mg

since mass,gravity,radius and angular velocity are constant, so R2>R1

Normal reaction is the sense of weight of a human

In conclusion, people feel lighter at the top and heavier at the bottom, the teacher is NOT CORRECT.

[cxs1023]

@cxs1023 Also,世界上系冇離心力架,只有向心力(centripet­al force)

[brokegagfountain]

@cxs1023

in fact, 離心力 exist, but it's not a "real" force.

it's a "force" experienced by objects in a accelerating reference frame.

[Cedricllau]

@cxs1023 angular velocity 係constant?

[Cujo19760210]

@cxs1023 No matter what position you are...The gravitational force will ALWAYS 9.8kgm/s²!!!

At the roof, The neutral force will be lighter than at the bottom!!!!

Free-Body Diagram will explain why you "feel" lighter at the lowest point!!!

The other common exmaple is taking the lift(elevator)!!!

If a lift is going up, since the neutral force is increased, you "feel" heavier and vice versa!!!

[alextang07021]

wow it has a camera on that shit "3G" HAHAHA just kidding

[yiptinkin]

a)這豎直圓周運動的角速率有變化，所以不是勻圓周運動。。

b)速率最高的一刻，向心加速度最大。

c)「離心力」是慣性(虛構)力，實際作用於物體的淨力稱為向心­力。

d)在最低點淨力等於法向反作用力減去重力。

e)若最高速率為零，按能量守恆下墜而摩擦力忽略不計，最低點的­向心加速度為4g。若將摩擦力考慮在內，向心加速度在最低點則會­比4g略少。

f)生果報點解不正正經經找一個中學或大學物理老師講解？

[Cujo19760210]

@yiptinkin 雖然舊中四或中五物理沒向心力讀...

所有物理老師都識..因為向心力在物理是大課題!!!

由電子圍繞原子核和八大行星圍繞太陽,

以至天上的人造衛星,都是向心力的原理!!!!

[1313SUPERBB]

好驚丫XD

都5知玩吾玩好@_@

[siu8364]

請閣下不要叫Vic Chan,改名為FAKE Chan=]

[aluchialananami]

大家應該係吊佢又造作賣廣告

唔係吊佢教錯野 佢只係講緊3.9G來自 向心加速(a=2.9G)+地心加速(g=1G)

隻字沒有提過離心力

[johnnywong1023]

@aluchialananami

=]



[superfirzen]

@aluchialananami 離心力不存在

[alexishandsome]

*that faggot points to the origin and says: this is the origin.

FUCK YOU how old do u think i am.

[heihei0811]

@TwHiN1992  佢好似唔係物理or工程既博士

[TwHiN1992]

博士都錯d咁既野?我唔係好信....

[heihei0811]

跳樓機一定唔係free fall-.-

[athleticchak]

@heihei0811

外國叫跳樓機free fall

[thwongterry]

@athleticchak 準確d, 跳樓機英文係 free fall

[athleticchak]

@thwongterry

我咪講係free fall

[thwongterry]

@athleticchak lol 我補充, 唔係話緊你 :)

[yanhky]

SH--T! 請大家舉報此影片!!

等佢唔使再賣廣告!!!!

[FurgusYau]

新聞黎?

[brokegagfountain]

Vic Chan?? 你以後唔好教Physics好了!!!

3.9G, if mentioned in 機動遊戲, refers to the inertial force equivalence experienced by the player. so, here we consider the centripetal force, which points to the center, but the centrifugal force, which points out from the center.

Therefore, the lowest point is where the forces all add up and give the maximum value while for sure not the highest point!!

[qkw24]

@brokegagfountain Yes. It is. Six Flags has the same ride and I felt more forces applied on me when I am at the lowest point.

[aluchialananami]

好想去玩下~

[siu8364]

今朝上phy拎左黎做反面教材a_a,一流

[dproject628]

正

[dproject628]

好正~

有無人想去玩？

[ckllily1211]

個所謂既老師係咪想昆人

[sinadotcom]

我想講個呀 Sir 掉轉左Force既方向來講！仲講到有文有路咁，比佢吹到 beebee 聲。

[0Edm0]

跳樓機最多咪free fall 咪1 G，邊有3G呀，唔好作大數播，海洋公園你咁樣計Ｄ數好過份，我­就唔信你將兩個centripedal force 拎左vector仲有 3.9G，你邊有咁多力？

[tszfai]

thanks apple daily give me so much videos for hitting aeroplane!

[1992ISSAC]

Vic Chan 呢個老師係唔係教錯野?

如果個angular velocity 係constant既話

一個人受到最大力應該係最底果一點(normal reaction force)

[sexykanine0826]

都吾知佢UP乜春

[packard2005]

仲以為你個波有G級!!

[kelvin254kk]

Omg ... Super wrong maths and this is fucking wrong!

This teacher = failed physics = FAILED = waste money if u learn from him

[yukibo2]

又賣廣告= =

[dragonofhehell]

末代廢育

[bk4479]

好彩我phy冇補佢...

[ivesishere]

即係點?

[samsek123]

呢個就係我唔補習既原因~

[kira12305]

我地掛住睇動新聞

冇人買佢產品...

搞到要賣廣告- -

[siu8364]

circular motion?_?

[jason9080asa]

好似好有問題wor- - 首先C.F.係一件object的net force, 所謂重力應該係R比出泥 Assume C.F. is constant, 最高點 C.F. = mg + R => R=C.F. - mg 最低點 C.F. = R - mg => R=C.F. + mg 所以如果C.F.係constant,最低點的R一定大過最高點­­R 至於現代條友錯,係因為佢當左C.F.係真係一個Force咁計­­- -但係其實C.F.係Object向心的Net force-v- 只有當個C.F.不是constant,所以才會最高點的R>最­­低點的R 為人老師,亂人concept,很不該=.=



[1992ISSAC]

@jason9080asa 我同意 應該最高果一點反而係最輕 因為CF有重力比左d 所以normal reaction force 就可以最細

[cfsscfsshk]

條數計錯到離晒普

[sate143]

唉，做咩事又咁啊。之前賣廣告都忍左你，大家一齊講一聲:屌!

[sate143]

@9191919abcd 你文盲?我話緊Apple啊,有鬼屌你~心虛以爲我屌你炸掛

[arzsmall]

咁都叫新聞- -'



[hoiningt]

wtf is the physics teacher on about??? O_O" 

[ThePatchyu]

@hoiningt angular motion .. lol

[F3L8X5H3C1T]

凸~!!! Ｉ　ｗａｎｔ　Ｍｙ　Ｆｘｘｋｉｎｇ　Ｎｅｗｓ！！

[fififans]

played at canada wonder land

pretty noob ...

[msladycelerysoup]

@fififans ya i know. it isn't scary at all

[johnquanchen]

搞么啊，，都不是新闻

[chinghei38]

都吾知個條友講咩...直接d話邊到啦..

[WorldTour09]

I think that teacher is wrong. Poor students ...

[taisanworld]

Wonderland Psyclone?

[XFreedomXX]

@taisanworld

i was thinking the same thing lol

but it doesn't go around and 360

[taisanworld]

@XFreedomXX

Right, but there isn't a big difference...

[kelvinlokahong]

You call that a physics teacher. WTF!

[initialvin]

she is a brave girl

i would totally chicken out >.<

[2tfarcrats]

Physics Teacher?? WTF?

Poor students....

[jinkoo]

超錯!!

[free4leo]

By observation, the angular velocity is minimum at top.

using a=v^2/r, assuming the angular velocity is close to 0 at the top of its path, we can assume the centripetal force due to the circular motion is close to 0.

Therefore, at the top of the its path, the acceleration is roughly same as gravitational acceleration, which is 1G.

In the other hand, the angular velocity is highest at bottom, therefore physically G force would be highest at that point, which would make more sense to anyone.

[free4leo]

Just note that centripetal acceleration and G force acting on body are two different things.

Acceleration causes the ride to go faster, which G force is the factor of gravitational force acting on body.

[alterw8]

@free4leo Your statement about "we can assume the centripetal force due to the circular motion is close to 0." is incorrect since the centripetal force is non-zero.

As soon as notation "v" is concerning the velocity instead of angular velocity "θ", the centripetal is at most said to be " not so high" rather than zero given that it has to maintain the circular motion.

[free4leo]

@alterw8 You are right. I got V and θ equation a little bit mixed up. I said the centripetal force is CLOSE to 0, not 0. It is a rough assumption just to show that what the guy says in the video is completely wrong!

[haoslsd]

佢有錯咩?冇呀

[mpopo123]

on9 跳樓機 唔係freefall 咩?!

[lose1000]

@mpopo123 跳樓機快過free fall

[lose1000]

@mpopo123 恥

[ericchow74123]

甘究竟邊個岩?

[airr916]

mobile phone ar? 3.9 G...TIL!

[wongwanchap]

錯晒,中學物理學得唔好