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Author Topic: Add. math!! dude slvri/astar/aadi/sam nebody help..!!!!!  (Read 22351 times)

Offline ~~~~shreyapril~~~~

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Add. math!! dude slvri/astar/aadi/sam nebody help..!!!!!
« on: October 31, 2009, 10:26:34 am »
A plane flies from an airport A to an airport B. The position vector of B relative to A is (1200i + 240j) km,
where i is a unit vector due east and j is a unit vector due north. Because of the constant wind which is
blowing, the flight takes 4 hours. The velocity in still air of the plane is (250i + 160j) kmh–1. Find the
speed of the wind and the bearing of the direction from which the wind is blowing.

this quesiotion has stuck me up!!!

help!!
ans is 112(app.)
at 333o acc. to ms
« Last Edit: November 13, 2009, 06:13:30 am by ~~~~shreycool~~~~ »
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Offline ~~~~shreyapril~~~~

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #1 on: October 31, 2009, 10:57:57 am »
help ios wat everyone needs
no one here is providing me wid that!!!  :( :(
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Offline Ghost Of Highbury

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #2 on: October 31, 2009, 10:59:06 am »
to find the speed = 1200i + 240j/4 = 300i+60j

250i  + xi + 160j + yj = 300i + 160j

xi = 50i

yj = -100j

refer to the diagram

angle XON = 90 - XOZ

XOZ = tan-1 2 = 63.4

therefore XON = 26.6

the bearing wud be the reflex angle i.e 360-26.6 = 333.4
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Offline ~~~~shreyapril~~~~

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #3 on: October 31, 2009, 11:01:14 am »
cool
freaking answer!!
how do you manage it dyude???
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Offline Ghost Of Highbury

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #4 on: October 31, 2009, 11:03:55 am »
Quote from: ~~~~shreycool~~~~ on October 31, 2009, 11:01:14 am
cool
freaking answer!!
how do you manage it dyude???


read the add. math book and solve the papers.
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Offline ~~~~shreyapril~~~~

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #5 on: October 31, 2009, 11:04:49 am »
hmm!!
i'll try to do so!!
chal then will be bak wid few more doubts!!
haha
dont mind answering them rite???  :P :P
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Offline ~~~~shreyapril~~~~

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #6 on: October 31, 2009, 11:21:31 am »
2002 oct
question no. 10 lst part!!
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Offline ~~~~shreyapril~~~~

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #7 on: October 31, 2009, 11:26:03 am »
i got every thign just last part mein doubt!!!

bachaooooo...!!!
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Offline Ghost Of Highbury

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #8 on: October 31, 2009, 11:32:12 am »
Quote from: ~~~~shreycool~~~~ on October 31, 2009, 11:21:31 am
2002 oct
question no. 10 lst part!!


gr8 then!

no need to explain everything!

u already have one equation for OQ which u found out in ii

now..u know that OQ = OA + AQ

substitute the value for AQ in this eq.

now, u have 2 values for OQ in the form of a,b, lamda and u

compare the co-efficients of a and b to find the value of those 2 constants
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Offline @d!_†oX!©

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #9 on: October 31, 2009, 11:34:47 am »
i) OA + AP = OP
   AP = 1/3 b -a
  OA + AB = OB
  AB = b - a
  AM = 1/2 b - 1/2 a
  OA + AM = OM
  OM = a + 1/2 b - 1/2 a
  OM = 1/2 a + 1/2 b

ii)THEREFORE, OQ = (i dunno how to put dt symbol here[M TAKING IT AS y])(1/2a + 1/2b)

iii)AQ = (another symbol[M TAKING IT AS x])(1/3b - a)

iv)OA + AQ = OQ
   a + x/3 b - xa = y/2a + y/2 b

dude even m confused wat to do next????
anyone there???
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Offline ~~~~shreyapril~~~~

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #10 on: October 31, 2009, 11:38:37 am »
toxic no need this much!!
By the way thanx aadi
nd toxic thanx for firt explanation!!!  :P :P
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Offline Ghost Of Highbury

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #11 on: October 31, 2009, 11:41:31 am »
dude!...didnt u read wat i just said

COMPARE THE CO-EFFICIENTS!!

FIRST REARRANGE

a(1-x) + x/3 b = y/2 a + y/2 b

now

1-x = y/2

y = 2-2x
--
bx/3 = by/2

x/3 = y/2

2x = 3y

2x = 6-6x
8x = 6

x = 3/4

substitute to find the value of y/ i am bored~
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Offline Ghost Of Highbury

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #12 on: October 31, 2009, 11:42:10 am »
Quote from: ~~~~shreycool~~~~ on October 31, 2009, 11:38:37 am
toxic no need this much!!
By the way thanx aadi
nd toxic thanx for firt explanation!!!  :P :P

ahh..thats k..

abbe..isko chod...solve all relative velocity first..yeh chindi hai!
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Offline ~~~~shreyapril~~~~

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #13 on: October 31, 2009, 11:42:42 am »
haha
hihih
huhuh
bored doing add. math???

great i think you are the fisrt to get so!!!
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Offline ~~~~shreyapril~~~~

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Re: Add. math!! dude slvri/astar/aadi/nebody help..!!!!!
« Reply #14 on: October 31, 2009, 11:43:54 am »
Quote from: A@di on October 31, 2009, 11:42:10 am
ahh..thats k..

abbe..isko chod...solve all relative velocity first..yeh chindi hai!
trying to find them!!
but have got only one in p2 till now
i have done all p1 questions
so no use doing them again!!!
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