IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: vaan on November 09, 2009, 12:03:21 pm
-
hey ppl...put ur add.math question here...n hope dat me...or some1 else 'll help..... ;) :)
-
hey ppl...put ur add.math question here...n hope dat me...or some1 else 'll help..... ;) :)
A plane flies due north from A to B a distance of 1000 km, in a time of 2 hrs. During this time a steady wind, with speed of 150 km/h, is blowing from the south-east. Find the direction in which the plane must be headed.
i hav solved this question, but need more practice in it, so du u have any note for such type of questions, and wat do u call this type of questions, which chapter are these questions frm ???
-
A plane flies due north from A to B a distance of 1000 km, in a time of 2 hrs. During this time a steady wind, with speed of 150 km/h, is blowing from the south-east. Find the direction in which the plane must be headed.
i hav solved this question, but need more practice in it, so du u have any note for such type of questions, and wat do u call this type of questions, which chapter are these questions frm ???
these are relative velocity questions. i know theyre hard, theyre real b*tches...........anyways
VP=1000/2=500 kmh-1
VW=150 kmh-1
the direction the plane must be steered in is of VP/W
the relative velocity equation is VP=VP/W+VW
refer to diagram attached
theta is the angle that the plane must be steered on
using the cosine rule
cos45=(5002+1502-Vp/w2)/2(500)(150)
Vp/w=407.96kmh-1
using the sine rule
150/sin theta=407.96/sin45
theta=15.1degrees
bearing is 015.1degrees
sorry for the sh*tty diagram but my drawing sucks in Paint
hope this helped
-
hey slvri, just 1 doubt, isnt 500km/h the velocity of plane relative to wind? because after the wind is blown it moves north rite?
-
hey slvri, just 1 doubt, isnt 500km/h the velocity of plane relative to wind? because after the wind is blown it moves north rite?
arrey the answer is right. read the quest carefully n u will c that the plane travels 1000 km, and while traveling this distance the wind is also blowing...
therefore there 2 forces acting, 1 of the plane and one of the wind to travel the 1000 km distance.
Now this results in a vector where the total velocity ( 1000/2 = 500 Km/h ) equals the velocity of plane in still air and the velocity of wind.
thus: this form a triangle as drawn by slrvi where AB is 500Km/h.
i hope this is clear.
-
these are relative velocity questions. i know theyre hard, theyre real b*tches...........anyways
VP=1000/2=500 kmh-1
VW=150 kmh-1
the direction the plane must be steered in is of VP/W
the relative velocity equation is VP=VP/W+VW
refer to diagram attached
theta is the angle that the plane must be steered on
using the cosine rule
cos45=(5002+1502-Vp/w2)/2(500)(150)
Vp/w=407.96kmh-1
using the sine rule
150/sin theta=407.96/sin45
theta=15.1degrees
bearing is 015.1degrees
sorry for the sh*tty diagram but my drawing sucks in Paint
hope this helped
dude i knew the answer,
but appreciated any which ways..,. ;)
-
abbe dude...i know the answer and triangle law..just wanted to confirm the Vp/w
lol, if u knew the answer y did u ask! :P :P
-
nope.........Vp is the velocity of the plane and its the true or actual speed with which the plane travels........it says that the plane goes north at 500kmh-1 so the true velocity is 500kmh-1
-
abbe dude...i know the answer and triangle law..just wanted to confirm the Vp/w
lol, if u knew the answer y did u ask! :P :P
i wrote, that i knew the answer (upak dekh). i jus wanted 2 know wat chapter is this frm... :P
-
ohh..!!
this is from relative velocity and vectors!!!
i thought you wud know this!!
-
question...no..6..m/j 07...paper2...can some1 help me.. :-\.i tried a lot of times but could not find my mistake out....now im confused :-\
-
 = 2xln x + x)

+
= 
=
- 
2
=
- 
2* 2
= 2 *
- 
4
= 
= 
applying the limits
=
- 
=
+ 1
-
nice to see latex being used. The answer is right too
-
it takes hell lotta time though.
-
why cant we have the symbol for integration ready???
-
That is how latex wortks.
-
it is better if we have a shortcut fro it!!
-
i hate integration...de only thin im weak at.... >:(
-
integration is easy for c1 anyway. Always add one to the power and divide by the new power. Just be methodical.
-
For anything else they usually give you a hint
-
de main problem comes...when dey 1st ask2 differentiate...n den wit dat integrate
-
hope u understood that answer i had typed
-
ya i understood dat answer....n thanks....
-
i feel integration as interogation!!!
-
a tip guyz - remember how to sketch the inverse of any weird curve too using the y=x method. may turn out very useful.
-
thanx dude!! :D :D
By the way add. math was good!!
-
Ooyeee shauw...dnt u think itz enaf of stdiz..we knw we both r cuming up wid 5 * and 6*..so letz party...4get bou chem p1..itz childz play..u get u mustang n m geting camaro..letz go kick sum arse..itz gona be real fun.:D:D:D
-
hey slvri, just 1 doubt, isnt 500km/h the velocity of plane relative to wind? because after the wind is blown it moves north rite?
Slvri, Aadi is right... 500 km/h is the velocity of the plane relative to the wind. When you are looking for the time taken, you use the RELATIVE/RESULTANT velocity... Which must be parallel to the line AB here...
True velocity of the plane in still air is not the same as the velocity with which it is actually moving when the force of the wind is acting on it.
I did this question maybe ten times...lol.....for friends...
You got the answer cause your drawing is good... The labellings only are not...
Ah, let me put it: No offence meant. :)
I noticed you used Alpha, that's funny! :D
-
stop this discussion..!!
add. math is over..
nmow just enjoy :D :)
-
stop this discussion..!!
add. math is over..
nmow just enjoy :D :)
Heyyyyyyyyy......... You're always after me with your ever famous sentence: Stop this discussion!! :P :P :P :P
Okay, I'm just telling... Clearing doubts... It's somehow wrong not to let out what is wrong. Mistakes are meant to be improved. And we are here to help improve.
And yes, I specified: No offence meant.
-
this is not phylosphi or something :P
so have this type of chat in other thread :P
-
ya chemistry n moreover P1...haha de exam is already over.....so lets have a race.....remember de last race wit police....fool came 2 catch de champions....n ended up wit crash...i still have de video... gonna upload it in fb soon...
-
Race...hahaha..m already on it..bt we gota b sure no police..n no uploadin vidz..ma dad tuk ma keys..bt he dznt knw he stole da spare frm hz locker..haha..get it..oh n wat bou chem tuitionz today..letz go n distrb all da studntz as wel as sir..hw wl dat be..:D:D
-
man...u jus took de words of my mouth....ya im comin 2 tuition 4 helpin u.... :D well hope we
don exceed de limit dat sir kick us out... :D its really g8 of havin fun well others r jamed in studyes...
-
U feel me brah..all da nerdy nerdz wl b stdyin wid dea guardz up..hahahahaha...n we gna add lil spice to it 4 dm..
-
a@di....adi toxic....wat u in ur mind2 go 4some crazy fun...or like my other (fools..not 2 mention) friends bsy in studyin....
-
goinf to dubai!!, lol, currently, will plan for KFC, 2012 and stuff lets see..
-
great aadi!!
By the way abbe our movie ka plan is just on the verge of getting fianlised :)
-
this is not phylosphi or something :P
so have this type of chat in other thread :P
Not philosophy, it's common sense. Normally, we have it everywhere.
-
and your common sense is totally fucked up....cumin n blabbing afta xamz like a moron...go get a lyf dude....
-
and your common sense is totally f**ked up....cumin n blabbing afta xamz like a moron...go get a lyf dude....
HEY? Wasn't one warning enough???????????????
Go get some manners you!!!
And yea, keep your bloody tongue and comments to YOURSELF.
-
yo clown warning 4 wat....i chkd da SF rules...n deaz nothing wrong....n even if deaz sth wrong...i dnt give a fuk...straight forward...wat dey gona do bannn me.....hahahahahahaha.......nd manners...dtaz a word we dnt use xcept 4 da 1z hu really desrve it....n akkording to me....u r a moron nd a blabber....n at a point even a person hu tries to showoff....sayin ""i got mo brainz den u"""...datz da nly reason posted u commeny n da 1zt place ...AFTA XAMZ....
-
Yea... Cause unlike you, I don't have time before exams.
It's YOU who are blabbering... Or rather, barking for no reason. I haven't called your name anyway.
And yea, I neva bragged about anything. I neva said anything. You imagined it by yourself.
You seem to be a psycho to me. Having nothing else to do except meddling in MY affairs.
You're just a nonsensical schizophrenic, blabbering mannerlessly.
If you don't have manners, then just shut it up and get lost!
-
both of u , chill down and shoot the dispute plz.
-
u jst provd da fact dat u r da bigest clown and a moron.....tryna showoff wid words.....da only thng it shows dat u r a wannabe.....ah datz ryh u neva sed anythng......bt u bullshit comments is getin me new mails....so kindly shut da fuk up....boot licka..datz da name 4 moronz at oua skul....
-
ok cut the crap dude..chill down
-
ok ok ok ok......milady,..... :P :P ;D ;D ;D ;D....
-
u jst provd da fact dat u r da bigest clown and a moron.....tryna showoff wid words.....da only thng it shows dat u r a wannabe.....ah datz ryh u neva sed anythng......bt u bullsh*t comments is getin me new mails....so kindly shut da fuk up....boot licka..datz da name 4 moronz at oua skul....
No, damn it. Am not a wannabe. I'm an already been.
Great boy, shouldn't have messed with me.
Just tracked you out.
United States.
Great, I now know people there are mannerless.
The biggest clown and biggest moron is YOU. And YOU would better shut it up. And yea, the mails that you are getting, keep them as souvenirs!!! Will remind you of WHAT you are.
-
both of u , chill down and shoot the dispute plz.
Aadi.... HE started it first.
Started abusing me.
I complained once.
Enough is enough.
-
boy i scolded u 1ce today.....y u wan it again.....dude u r such a bigtym moron....dat wat u did was search me....hahahahaha.....n u knw wat....u gt it wrng da whole way down...m akross da earth sumwhea n far frm united states...n 1 mo thng...u provd again wat a moron u r...xperiencing 1 personz bhaviour u kame to da cnclusion dat people r mannerles in usa...hw full of worm u brainz cld me....cant imagine even..
-
Hey, whats happening over here? I can see some sort of a fight.
Now, I am asking u two to please stop and swearing is not allowed in the forum.
Calm down, and get back to the thread's real topic.
Thank You.
-
First, am not a boy. If you had sense, you would have SEEN that. You are an ALLTIME moron yourself.
And yea, keep the bragging for yourself.
Huh, somewhere far... Fools only would believe that.
For privacy reasons, am just keeping it up till here. Else, would have given you your own traces! Damn.
Second, mind your business. Instead of just meddling in what does not concern you.
It's YOU who picked up on me!!! Why? Something's pricking???? What the hell is your problem???
You don't even know me yet... And already made your damn conclusions.
-
Hey, whats happening over here? I can see some sort of a fight.
Now, I am asking u two to please stop and swearing is not allowed in the forum.
Calm down, and get back to the thread's real topic.
Thank You.
Shoushou... READ it all....
And ask him what his problem is with me!!!!!!!!!!!!!!
I helped someone ELSE. I posted something for someone ELSE. Where is HIS problem??? He has been abusing me as if I were his property.
-
Okay Alpha report all his abusing posts please and dont answer him back.
-
Okay Alpha report all his abusing posts please and dont answer him back.
I reported already! Twice now... For how long will this go on?? He starts all over again.
There is a limit.
-
bfo m bannnd....hahhahaha....i wl say 1 thng....like ma name says m da devil......u think so banning me wl stop me....i already hav 2 mo akkountz...i wl b bk...hahahaha...deaz alwys a flaw even in da best system....watchprison break...it mite give u ppl sum insoiration....lmfao...hahahahahaha
-
dA dEviL, I did not mention anything about banning u, stop that attitude please. This is not the way u speak here.
You get 4 warnings after that u are banned, and about ur 2 accounts...I know how to ban u completely from the forum.
Now I am asking u to end this now, I dont want to see another post about this matter, get back to the thread's topic.
Alpha, I didnt get any reports, I will check anyways.
Thank You.
-
well hun...dats da only thng u guys kan do....bannnn me.....n go ahead pls....do wateva u wana do....bt i wl b bk wen i wan to....bt until den...adios
-
hey hey hey !!!
You resepct any mods and admin u understand?! >:(
and we do not tolerate your attitude in this forum .. your getting banned because i already warned you yesterday!l
-
is he gone??as in banned??
-
Shoushou... I did report.. And I sent one to Q80 too.... I don't who is the mod for this thread.
Da Devil... Do not be so overconfident. You said it right, there is a flaw even in the best system, even in yours as well. Think before you act.
Thank You Q80 for your help. Thank You too Shoushou.
-
i think he's gone now...as in banned..cuz his name appears in black..is that right Q80/shoshou??
-
I didnt know he was also warned by Q80. Fair enough.
He is banned now.
-
im bak......:D:D:D:D:D
-
im bak......:D:D:D:D:D
:D :D :D
E-mail address is hidden... That means I was right. You can't hide your time zone.
Frankly, you are the biggest fool I have ever met. Steals and declares it in public: Here I am, the thief!
It's futile to hide now...
-
a@di....adi toxic....wat u in ur mind2 go 4some crazy fun...or like my other (fools..not 2 mention) friends bsy in studyin....
ahh...sorry vaan..was not too frequent on this thread in the last few days so ur question went unanswered...
hmm..me i have planned alot....we(my friends and me) have planned a gr8 day out on 16th which is tom...nd m soo excited...we're gonna watch a cool muvee nd then out for some real gud fun...its gionaa be awesome i hope....nd the plans for the rest of he days would be coming up spontaneously.....what about u dude??
-
im bak......:D:D:D:D:D
ByeBye.
-
lol...i just saw...he's banned again :P
this guy is such a pain in the a** for every1
-
lol...i just saw...he's banned again :P
this guy is such a pain in the a** for every1
In mine.... you mean... He'll be back... I bet... You can't get rid of them so easily.
-
@Adi, no bad words please.
@Alpha, let him try :P
and please proceed with the thread's topic.
Sorry Vann for that. =D
-
Vaan is the idiot's other account .. track his IP :P
-
Vaan is the idiot's other account .. track his IP :P
hahahahaha...seriously?!! OMG hahaha....i will track his IP wait :P
-
sorry mony...will remember this..ust got abit excited u know...lol..
and Q80 dude wat are u saying??vaan in da devil??if it is true...den dude...the guy's got really gud acting skills
-
Hey yea.... Same location... You banned him... Thanks again!!
I think am gonna keep a bucket of "Thanks" for you....lol
Hehehe, am sorry... I know I don't have the right to track... Last one! Promise.
-
well hun...dats da only thng u guys kan do....bannnn me.....n go ahead pls....do wateva u wana do....bt i wl b bk wen i wan to....bt until den...adios
I'm going to ban his ip address as well.
If he re-registers under another ip address (using a proxy); pm me. I'll get rid of this trash.
-
I'm going to ban his ip address as well.
If he re-registers under another ip address (using a proxy); pm me. I'll get rid of this trash.
Thanks Mani...
-
i just feel pity 4 u foolz...deaz a flaw in jst u system clownz..n nt myn...next wat ima do iz..go to cafe make 10 akountz nd fuk u all up..hahahahaha..nd lastly i wl use ma own comp..bt pussys u kant trak ma ip next tym because ima hide it punkz..check out google..u wl find wateva u n3d..nobody kan blck dA dEviL..HAHAHAHAHAHAHAHAHA
Anyways eid iz kuming..eid mubarak to u all...hope u have a fine eid..nd ma nxt appearance wl b afta eid..:D
-
Hi Tareq!
Thanks for posting!
Bye Tareq!
Get a life, you pathetic piece of sh*t.
~!User banned!~
-
Good riddance.
-
Good riddance.
I've banned his hostmask. If he does re-register, I'll make sure to ban him.
-
I gave that biatch a piece of my mind.... let him burn in hell. >:D
-
Mani dadude..U SHOULDNT HAV USD MA NAME
during eid ppl give giftz..so heaz a gift 4 ya mani..dnt cry 2 hard poor boy if u r 1..
Just wanna holla @ my son mani dadude/sorry 2 b da 1 2 tell u this,but ur mama was a w***e/if only i knew dat she cudnt afford abortion/i cud have fuckd her wit caution/maybe i wudda accepted u if u inherited my gud luks & not ur mama's butt face/ enough about ur mama 4 now/she probly thinkin bout me & singing rihanna's 'take a bow'/stop fuckin A** homie rather masturbate/im so hot,im make a lesbian wanna be straight/ill kick u in da nutts till u mentruate/beat u up till u need 1 st aid/say sumthin',i know ur heart is filld wit hate
like i sed i wl b bk...oh n fuk u bt hav a nyc day :D:D:D
-
could this guy be more of an ___________________? :P :P :P
-
could this guy be more of an ___________________? :P :P :P
Im sure he can be, yes.
-
By the way mate, yeah u idiot trying to be funny, your lame!
i dunno ever thought about getting a life? u can get one from www.getalifeudickhead.com
see i can be lame too ;)
-
i dont understand what is going on here,
reading the older pages, did not make me understand anything
loool
that makes me feel good - i think as if i am in my own world enjoying :D
-
lol nothing major :P
just a jobless kid insulting some members .. dont worry its taken care off ;)
-
i dont understand what is going on here,
reading the older pages, did not make me understand anything
loool
that makes me feel good - i think as if i am in my own world enjoying :D
[/quote/]
Im in that world with you :P That's how lost I am too...just go with the flowww ;)
-
hehe nice
just keep a track of ur posts.
ur about to approach the magic number.
-
hehe nice
just keep a track of ur posts.
ur about to approach the magic number.
haha ! Oh yeahhh lolololooooooooooooooll :P 5555
-
for inserting mathematical equations and stuff.
it can be made something similar to the interface of word 2007
that thing simple rocks in making equations.
or there should be some support or something, that will convert equations and stuff from word 2007, and be converted to SF standards.
-
You'll ban his IP again? He's using the net from public providers.
-
You'll ban his IP again? He's using the net from public providers.
Who cares what he does?
It takes effort (even if it's a minute) to make a new e-mail account then a new SF account.
We'll keep banning him. Let him waste his time.
AND Tareq. I don't believe you can freestyle for sh*t. If you got what it takes, give me a time and we'll do it live on the mic at http://www.freestylemadness.com/new/
Aight Fa**ot?
pz
-
Who cares what he does?
It takes effort (even if it's a minute) to make a new e-mail account then a new SF account.
We'll keep banning him. Let him waste his time.
AND Tareq. I don't believe you can freestyle for sh*t. If you got what it takes, give me a time and we'll do it live on the mic at http://www.freestylemadness.com/new/
Aight Fa**ot?
pz
Mani, you're online... Didn't see...LOL
But if you keep banning PUBLIC IPs, how will other members get access here? IPs will remain the same. They are not going to change. Okay, I'll PM you.
-
Mani, you're online... Didn't see...LOL
But if you keep banning PUBLIC IPs, how will other members get access here? IPs will remain the same. They are not going to change. Okay, I'll PM you.
Only static IPs do not change, the rest keep changing.
Well you see we don't just ban the IP address. We ban the e-mail, the username, the hostmask or whatever feel necessary. We also check if anyone else is sharing the ip address (someone in his/her vicinity) and then see if we should ban the IP as well.
Sure. PM me ;)
-
Only static IPs do not change, the rest keep changing.
Well you see we don't just ban the IP address. We ban the e-mail, the username, the hostmask or whatever feel necessary. We also check if anyone else is sharing the ip address (someone in his/her vicinity) and then see if we should ban the IP as well.
Sure. PM me ;)
Sent... :)
My excuses, it was lunch time here. Had to be out for a while.