aerodynamics questions and suggested answers 8

8/13/2019 Aerodynamics Questions and Suggested Answers 8

1/13

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ÔÔPJLQKKH QOEOQ]OP M_K

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LDM EK]K ÔIKGKPKH 7 QEC 1111

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Khswor cdur (=) quostjdhs.

LOP]KQ QDKIKH JHJ ]OPMJPJ MKPJ^KMK E_LK Q_PK]


2/13

- 0 -

QEC 1111/ QW] 1111

[uostjdh ;

k) Mosarjò bdw tbo ijct khm mrkf cdraos fohorktom `y k cjhjto spkh wjhf mjccor crde tbo

tbodrotjaki akso dc kh jhcjhjto spkh wjhf (kordcdji), khm tbo pbysjaki eoabkhjse cdr

tboso mjccorohaos. (3 ekrls)

Khswors7 Khmorsdh pf 1:? -1:3

Kh kjrcdji js sjepiy k soatjdh dc k wjhf.

]bo cidw dvor kh kjrcdji js twd-mjeohsjdhki.

Jh adhtrkst, k cjhjto wjhf js k tbroo-mjeohsjdhki `dmy, khm adhsoquohtiy tbo cidw

dvor tbo cjhjto wjhf js tbroo-mjeohsjdhki7 tbkt js, tboro js k adepdhoht dc cidw jh

tbo spkhwjso mjroatjdh. (1 ekrls)

]bo pbysjaki eoabkhjse cdr fohorktjhf ijct dh tbo wjhf js tbo oxjstohao dc k bjfb

prossuro dh tbo `dttde surckao khm k idw prossuro dh tbo tdp surckao. Ks k `y-

prdmuat dc tbjs prossuro je`kikhao, tbo cidw hokr tbo wjhf tjps tohms td auri

krduhm tbo tjpsòjhf cdraom crde tbo bjfb-prossuro rofjdh gust uhmorhoktb tbo tjpstd tbo idw-prossuro rofjdh dh tdp. Ks k rosuit, dh tbo tdp surckao dc tbo wjhf, tboro js

fohorkiiy k spkhwjso adepdhoht dc cidw crde tbo tjp tdwkrm tbo wjhf rddt, akusjhf

tbo strokeijhos dvor tbo tdp surckao td òhm tdwkrm tbo rddt. Qjejikriy, dh tbo

`dttde surckao dc tbo wjhf, tboro js fohorkiiy k spkhwjso adepdhoht dc cidw crde

tbo rddt tdwkrm tbo tjp, akusjhf tbo strokeijhos dvor tbo `dttde surckao td òhm

tdwkrm tbo tjp. Aiokriy, tbo cidw dvor tbo cjhjto wjhf js tbroo-mjeohsjdhki khm

tborocdro ydu wduim oxpoat tbo dvorkii kordmyhkeja prdportjos dc suab k wjhf td

mjccor crde tbdso dc jts kjrcdji soatjdhs. (1 ekrls)

`) Mosarjò tbo Luttk adhmjtjdh cdr cidw krduhm kordcdji wjtb rocorohao td cjhjto khfio

khm auspom sbkpos trkjijhf omfo. (6 ekrls)

Khswor7]bo Luttk adhmjtjdh js tbo d`sorvktjdh tbkt cdr k ijctjhf kordcdji dc fjvoh sbkpo kt k fjvoh

khfio dc kttkal, tboro oxjst tbkt pkrtjauikr vkiuo dc ajrauiktjdh krduhm tbo kordcdji wbjab

rosuits jh tbo cidw iokvjhf seddtbiy kt tbo trkjijhf omfo. Jt prdvjmo k rokijstja cidw

sdiutjdh. (; ekrls)

Jc tbo trkjijhf omfo khfio js cjhjto, tboh tbo trkjijhf omfo js k stkfhktjdh pdjht,

tborocdro S;5S

05> (0 ekrls)

Jc tbo trkjijhf omfo js auspom, tboh tbo voidajtjos iokvjhf tbo tdp khm `dttde surckaos

kt tbo trkjijhf omfo kro cjhjtokhm oquki jh ekfhjtumo khm mjroatjdh. (0 ekrls)

^rossuro kt pdjht k js oquki cdr cidw iokvjhf tbo tdp khm `dttde surckaos

k+

;

0"S

;

0

5k+

;

0"S

0

0

# S;5S

0

Jh `dtb aksos, tbo strohftbdc tbo vdrtox sboot kt tbo trkjijhf omfo,

" ]O( ) 5" k( ) 5S; #S0 5> (0 ekrls)


3/13

- 1 -

QEC 1111/ QW] 1111

a) Ajrauiktjdh krduhm aidsom aurvo A js mocjhom ks , wboro khm kro tbo

voidajty khm mjstkhao kidhf A rospoatjvoiy.

Qtkrtjhf wjtb tbo mocjhjtjdh dc ajrauiktjdh, morjvo Loivjhs ajrauiktjdh tbodroe

. (6 ekrls)Khswor7 Khmorsdh pf 1;3-1;6, dr

Loivjhs ajrauiktjdh tbodroe stktos tbkt cdr kh jhvjsajm jhadeprossjìo cidw, tbo ajrauiktjdh

kidhf k aidsom aurvo wbjab edvos wjtb tbo ciujm mdos hdt abkhfo wjtb tjeo, j.o.

M"

Mt5

M

Mt# S$ m s

A%( ) 5>

M

Mt" S# ms

A$( ) 5"

MS

Mt# ms

A$ " S#

M ms( )MtA

$

M ms( )Mt

5mS

M"

Mt5 #

MS

Mt$ ms

A% # S$ mS

A% (0 ekrls)

Crde Ouior Oquktjdh, tbo cjrst tore dh tbo PBQ

MS

Mt5 "

;

#$p

" MS

Mt# msA$ 5

;

%&p # msA$ 5> (0 ekrls)

òakusopjs tbo skeo kt tbo nstkrt' khm ncjhjsb' dc tbo iddp.

]bo soadhm tore

S" mSa

# 5 umu+ vmv + wmw( )a

# 5;

0m u

0+ v

0+w

0( )a

# 5;

0mq

0

a# 5 > (0 ekrls)

òakuso q js tbo skeo kt tbo nstkrt' khm ncjhjsb' dc tbo iddp (aidsom aurvo).

]borocdro

M"

Mt5 #

MS

Mt$ ms

A% # S$ mS

A% 5

;

&'p $ ms

A% +

;

0mq

0

a% 5 > (; ekrls)


4/13

- = -

QEC 1111/ QW] 1111

[uostjdh 0

k) K adepiox pdtohtjki js fjvoh `y

V z( ) 5 =z +;

0z+

;

z0

Cjhm tbo voidajty voatdr kt tbo pdjht (x< y) 5 (;< ;) (;> ekrls)

Qdiutjdh7

V z( ) 5 =z +;

0z+

;

z05 =z +

;

0z";+ z

"0 mV z( )

mz5u " jv

mV z( )mz

5 = " ;

0z0" 0

;

z15 = "

;

0 x + jy( )0" 0

;

x + jy( )1

mV z( )mz

5 = " ;

0 x0+ j0xy + j

0y

0( )"

0

x0+ j0xy + j

0y

0( ) x + jy( ) (0 ekrls)

mV z( )mz

5 = " ;

0 ;+ j0 ";( )"

0

;+ j0 ";( ) ;+ j( )

mV z( )mz

5 = " ;

=j"

0

0j ;+ j

( )

5 = " ;

=j"

0

0j + 0j05 = "

;

=j"

0

"0+ 0j

mV z( )mz

5 = ""=j( )

=j "=j( )"

0 "0"0j( )"0+ 0j( ) "0"0j( )

mV z( )mz

5 = +=j

";3 j0+

0 0+ 0j( )

"0( )0

" 0j( )0

mV z( )mz

5 = +

j

=+

= + =j

= + =5 = +

j

=+

=

2+

=j

2 , j0

5 ";

mV z( )mz

5 =;

0+

j

=+

0j

=5 =

;

0+

1j

=

mV z( )mz

5 =.? + >.6?j 5u " jv " u 5=.? v 5 #>.6?

Soidajty voatdr kt pdjht (x< y) 5 (;< ;) js S5=.?

j" >.6?

g


5/13

- ? -

QEC 1111/ QW] 1111

`) Qtkrtjhf wjtb tbo oquktjdh khm usjhf Gduldwslj trkhscdrektjdhs

w 5z +`0

z, sbdw tbkt tbo ekfhjtumo dc voidajty [w jh w-pikho akh `o roiktom td tbo

ekfhjtumo dc voidajty [z

kt k adrrospdhmjhf pdjht jhz-pikho `y tbo cdiidwjhf

oquktjdh

[w 5

[z

;" 0 `

r

#

$%

&

'(0

ads0)+`

r

#

$%

&

'(=*

+,

-

./

wboro rkhm ! kro tbo pdikr addrmjhkto jhz-pikho. (;> ekrls)

Qdiutjdh7

[z 5[w"w

"z

"w

"z5

z0# `

0

z0

5;#`

0

z0

"w

"z5;#

`0

roj$( )

05;#

`0o#j0$

r0

"w

"z5;#

`0ads0$# jsjh0$( )

r0

5;#`

0

r0ads0$+ j

`0

r0sjh0$5u # jv

u 5;"`

0

r

0ads0# v 5 "

`0

r

0sjh0# (3 ekrls)

ekfhjtumo dc"w

"z

"w

"z5 u

0+ v

05 ;#

`0

r0ads0$

%

&'

(

)*

0

+

`0

r0sjh0$

%

&'

(

)*

0

"w

"z5 ;# 0

`0

r0ads0$+

`=

r=ads

00$

%

&'

(

)*+

`=

r=sjh

00$

%

&'

(

)*

"w

"z5 ;# 0

`0

r0ads0$+

`=

r= ads

00$+ sjh

00$( )

%

&'

(

)*

"w

"z5 ;# 0

`0

r0ads0$+

`=

r=

%

&'

(

)*

[z 5[w"w

"z [w 5

[z

;" 0 `

r

#

$%

&

'(

0

ads0)+`

r

#

$%

&

'(

=#

$%%

&

'((

(= ekrls)


6/13

- 3 -

QEC 1111/ QW] 1111

[uostjdh 1

]bjh ake`or ijho z 506

=

mz

msx ;"

x

a

#

$%

&

'(

0

, > " x" a js sot kt kh khfio dc kttkal !td tbo uhjcdre

cidw. _sjhf stkhmkrm oxprossjdh cdr tbjh kjrcdji tbodry

mz

mx"#5 "K

d+ K

h

h5;

$

% adsh&>, wboro x 5;

0a ;" ads&

>( )

j) Ovkiukto tbo Cdurjor adoccjajoht K>, K;, K0. (;3 ekrls)

jj) Cjhm tbo oxprossjdh cdr ijct adoccjajoht, AI5 0" K

d+

;

0K

;

#

$%

&

'(khm edeoht adoccjajoht,

AE

;

=

5

"

=K

0# K

;( ) jh tore dc khfio dc kttkal !khm ake`or mz ms. (= ekrls)

Qdiutjdh

j)mz

mx"#5 "K

d+ K

h

h5;

$

% adsh&>, wboro x 5;

0a ;" ads&

>( )

z 506

=

mz

msx ;"

x

a

#

$%

&

'(0

5

06

=

mz

msx ;" 0

x

a+

x

a

#

$%

&

'(0#

$%%

&

'((5

06

=

mz

msx" 0

xx

a+

x1

a0

#

$%

&

'(

mz

mx5

06

=

mz

ms;"=

x

a+ 1

x0

a0

#

$%

&

'(

x

a

5

;

0;" ads#

>( )

mz

mx5

06

=

mz

ms;"=

;

0;" ads#

>( )+ 1;

=;" ads#

>( )0$

%&

'

()

5

06

=

mz

ms;" 0 + 0ads#

>+

1

=;" 0ads#

>+ ads

0#

>( )$

%&

'

()

mz

mx5

06

=

mz

ms";+ 0ads#> +

1

="1

0ads#> +

1

=ads0#>$

%& '

()5

06

=

mz

ms";

=+

;

0ads#> +

1

=ads0#>$

%& '

()

mz

mx5

06

=

mz

ms";

=+

;

0ads#

>+

1

=

;

0+

;

0ads0#

>

$

%&

'

()

$

%&

'

()5

06

=

mz

ms";

=+

;

0ads#

>+

1

2+

1

2ads0#

>

$

%&

'

()

mz

mx5

06

=

mz

ms

;

2+

;

0ads"

>+

1

2ads0"

>

#

$%

&

'( (3 ekrls)

Fjvoh tbkt

mz

mx"#5 "K

d+ K

h

h5;

$

% adsh&>


7/13

- 6 -

QEC 1111/ QW] 1111

mz

mx5"# K

d+ K

;ads$

>+ K

0ads0$

>+ K

1ads1$

>+ .... (; ekrls)

Adepkro adoccjajoht

"# K>506

10

mz

ms$ K

>5"# 06

10

mz

ms (1 ekrls)

K;ads"

>5

06

2

mz

msads"

> # K

;5

06

2

mz

ms (1 ekrls)

K0ads0"

>5

2;

10

mz

msads0"

> # K

05

2;

10

mz

ms (1 ekrls)

K15 K

=5.....5>

Aboal cdr K>

Kd5"#

;

$

mz

mxm%

>>

$

&

Kd5"#

;

$

06

=

mz

ms#;

=+

;

0ads%

>+

1

=ads

0%

>

&

'(

)

*+m%>

>

$

,

Kd5"#

;

$

06

=

mz

ms#;

=+

;

0ads%

>+

1

=ads

0%

>

&

'

()

*

+m%>>

$

,

Kd5"#

;

$

06

=

mz

ms#%

>

=+

;

0sjh%

>+

1

=

;

0sjh%

>ads%

>+

%

0

&

'(

)

*+

,

-.

/

>;>

$

Kd5"#

;

$

06

=

mz

ms#$

=+

1

=

$

0

%

&'

(

)*

+

,-

.

/>5"#

;

$

06

=

mz

ms

$

2

%

&'

(

)*5"#

06

10

mz

ms

jj) ]borocdro

AI5 0" K

d+

;

0K

;

#

$%

&

'(5 0" )*

06

10

mz

ms+

06

;3

mz

ms

#

$%

&

'(5 0" ) +

06

10

mz

ms

#

$%

&

'( (0 ekrls)

AE ;

=

5

"

=K

0# K

;( ) 5"

=

2;

10#06

2

$

%&

'

()mz

ms5#

06

10

"

=

mz

ms5#

06"

;02

mz

ms (0 ekrls)


8/13

- 2 -

QEC 1111/ QW] 1111

[uostjdh =

K strkjfbt siohmor wjhf wjtbdut twjst, js adhstruatom crde jmohtjaki kjrcdjis, wbjab eokhs

tbkt tboykii bkvo tbo skeo vkiuo dc k>5ma i m"occ . Jt eky curtbor ò kssueom tbkt k>js

jhmopohmoht dc!,khm tbkt tbo zord-ijct khfio dc kii tbo kjrcdjis js "I5>

5>

]bo wjhf mjspikys kh oiijptjaki ijct mjstrjùtjdh. Vjtbdut prddc jt eky ò kssueom tbkt cdrtbjswjhf tbo jhmuaom khfio dc kttkal js tboh fjvoh `y7

"j5

AI

#K

wboroAI

js tbo ijct adoccjajoht dc tbo wjhf, khmKtbo kspoat rktjd dc tbo wjhf.k. Qbdw tbkt cdr tbjs wjhf a

ijs adhstkht kidhf tbo spkh, khm sbdw tbkt7a

i5A

I

(;> ekrls)`. Morjvo tbo roiktjdh òtwooh tbo ijct-sidpo k 5mA

I m"dc tbo wjhf khm k

>5ma i m"occ

dc tbo kjrcdjis. (;> ekrls)Qdiutjdh7

k) Hd twjst7 sd !khm !I-> kro adhstkht khm ijct aurvo sidpo k>5 mai/m! ( "0#) js adhstkht

Khfio dc kttkal sooh `y tbo idaki kordcdji soatjdh js "occ 5"#"j

ai5k> \"occ#"I5>U5k> \"#"j #"I5>U wboro (k>5

mai

m"occ) (0 ekrls)

Ijct por uhjt spkh,"

I5

;

0 #S$0

a y( )a i

5

;

0"S

#

0k>$%$I5> %$j( )a y( ) (0 ekrls)

]dtki Ijct I 5 "I my#` 0

` 0

$ 5;

0%S&

0

k>'#'I5>#'j( )a y( )my#` 0

` 0

$

Jc aijs adhstkht kidhf tbo spkh, tboh k

>\"#"

j#"

I5>Ujs adhstkht, khm bohao

I 5;

0"S#0k> $%$I5>%$j( ) a y( )my%` 0

` 0

&

I 5;

0"S

#

0

k>$%$

I5>%$

j( )Q sjhao a y( )my"` 0` 0

# 5Q (= ekrls)

AI5

I

;

0"S

#

0Q

5 k>$%$

I5>%$

j( ) 5a i , j.o. a i 5AI (0 ekrls)


9/13

- : -

QEC 1111/ QW] 1111

`) Vo cduhm tbkt7

ai5A

I5 adhstkht

"

j

5

AI

# K

5 adhstkht

ai5k

>\"#"

j#"

I5>U (1 ekrls)

k>5

mai

m"

]borocdro, AI5a

i5k> \"#"j#"I5>U5k> "#"I5>#

AI

$ K

%

&'

(

)*

AI ;+

k>

"K

#

$%

&

'(5 k>()*)I5>)

mAI

m"5

k>

;+ k>/#K

(? ekrls)

k 5k

>

;+ k>/"K

drmAI

m"5

mai m"occ

;+mai m"occ

#K

5

#K mai m"occ( )#K +ma i m"occ

(0 ekrls)


10/13

- ;> -

QEC 1111/ QW] 1111

[uostjdh ?

k) ]bo voatdr cdre dc tbo edeohtue oquktjdh cdr stokmy jhvjsajm cidw akh `o wrjttoh ks

"S # $( )S 5 %$p

Vrjto dut tbo cuii 1-mjeohsjdhki cidw oquktjdh jh mjccorohtjki cdre cdr akrtosjkh

addrmjhktos. (;> ekrls)

Qdiutjdh7

k) "S # $( )S 5 %$p

S 5 uj + vg+ wl

" 5 j ##x

+ g ##y

+ l ##z

S " # 5 uj + vg+ wl( ) " j $

$x+ g

$

$y+ l

$

$z

%

&'

(

)*

5 u $

$x+v

$

$y+ w

$

$z

(1 ekrls)

S " #( )S 5 u $

$x+v

$

$y+ w

$

$z

%

&'

(

)*uj + vg+ wl( )

5 u$u

$x+v

$u

$y+ w

$u

$z

%

&'

(

)*j + u

$v

$x+v

$v

$y+ w

$v

$z

%

&'

(

)*g+ u

$w

$x+v

$w

$y+ w

$w

$z

%

&'

(

)*l

(1 ekrls)

"p 5 j #

#x+ g

#

#y+l

#

#z

$

%&

'

()p 5 j

#p

#x+ g

#p

#y+l

#p

#z (; ekrl)

]borocdro

"S # $( )S5 %$p

" u#u

#x+v

#u

#y+ w

#u

#z

$

%&

'

()5 -

#p

#x

" u#v

#x+v

#v

#y+ w

#v

#z

$

%&

'

()5 -

#p

#y

" u#w

#x+v

#w

#y+ w

#w

#z

$

%&

'

()5 -

#p

#z

u

"u

"x+v

"u

"y+ w

"u

"z5 -

;

#

"p

"x

u

"v

"x+v

"v

"y+ w

"v

"z5 -

;

#

"p

"y

u

"w

"x+v

"w

"y+ w

"w

"z5 -

;

#

"p

"z

(1 ekrls)


11/13

- ;; -

QEC 1111/ QW] 1111

`) Qtkrtjhf crde tbo `jdt-Qkvkrt ikw mS 5"

=#

mi $ r

| r |1

, sbdw tbkt tbo jhmuaom voidajty kt

pdjht ^, ks k rosuit dc k cjhjto sofeoht K@ dc k strkjfbt vdrtox cjikeoht dc adhstkht

strohftb " js fjvoh `y S 5"

=#b(ads$

K+ ads$

@)

wboro b js tbo mjstkhao crde ^ td K@, "K5#^K@ khm "

@5#^@K (;> ekrls)

Qdiutjdh7

mS 5"

=#

mi $ r

| r |1

S 5"

=#

mi $ r

| r |1

K

@

%

]bo ekfhjtumo dc S 5 S

S 5"

=#

mi r sjh$

r1

K

@

%5

"

=#

sjh$

r0 mi

K

@

% (= ekrls)

r 5b

sjh"

tkh #$"( ) 5b

i, % i 5

b

$tkh"& mi 5

b

sjh0"

m"

(0 ekrls)

S 5"

=#

sjh$

r0 mi

K

@

% 5"

=#

sjh$sjh0$

b0

b

sjh0$

K

@

% m$

S 5"

=#bsjh$m$

K

@

% 5"

=#b&ads$\ U

K

@

S 5"

=#bads$

K% ads$

@( )

ads"@5 #ads$

@

S 5"

=#b(ads$

K+ ads$

@) (= ekrls)


12/13

- ;0 -

QEC 1111/ QW] 1111

[uostjdh 3

K HKAK 0=;0 kjrcdji wjtb ;.? e abdrm kt k Poyhdims hueòr dc Poa51.;";>

3jh stkhmkrm

sok iovoi adhmjtjdhs bkvo tbo cdiidwjhf abkrkatorjstjas7

`duhmkry ikyor tbjalhoss "5?.>x

Pox

jh ikejhkr cidw khm "5>.16 x

Pox

; ?jh turùiohao cidw,

sljh crjatjdh mrkf adoccjajoht Ac 5;.102

Pox

jh ikejhkr cidw khm Ac 5>.>6=

Pox; ?

jh turùioht cidw,

Akiauikto

j) tbo `duhmkry ikyor tbjalhoss kt tbo pdjht dc trkhsjtjdh, (? ekrls)

jj) tbo hot sljh crjatjdh mrkf adoccjajoht dvor tbo kordcdji. (;? ekrls)

Kssueo tbkt tbo arjtjaki Poyhdims hueòr cdr trkhsjtjdh crde ikejhkr td turùioht js

3>>>>>. Dtbor kpprdprjkto kssueptjdhs akh ò kppijom

Qdiutjdh7 Khmorsdh pf 1?2-13> wjtb sijfbt edmjcjaktjdh ks cdiidws7

(j)

Poxar5

"#S#x

ar

#

53>>>>>

Poxar5

"#S#x

;

#

53>>>>> 53.> $;>?

Poyhdims hueòr `ksom dh abdrm iohftb Poa5

"#S#a

#

51.;$;>3

Poar

Poa

5 3.>";>

?

1.;";>35>.;:1? 5 #$S$x; $

#$S$a

$

5 x;

a

x;5>.;:1? " a 5>.;:1? ";.? 5>.0:>0? e

"5?.>x

Pox

5

?.># >.0:>0?

3.>#;>?

5>.>>;26e 5;.26ee (? ekrls)

(jj) ]d akiauikto sljh crjatjdh wo bkvo td kssueo turùioht cidw sljh crjatjdh mrkf dvor tbo

ohtjro iohftb dc tbo abdrm a< piusikejhkr cidw sljh crjatjdh mrkf dvorx;< ejhus

turùioht cidw sljh crjatjdh mrkf dvorx;.

Cdr turùioht cidw dvor ohtjro iohftb a, tbo turùioht mrkf cdr dho sjmo dc tbo kordcdji,

Mc,a( )turùioht 5q" Q Ac,a( )turùioht 5q"a Ac,a( )turùioht, wboro Q5a #;

]urùioht mrkf jh rofjdh ;

Mc,;( )turùioht 5q" Q Ac,;( )turùioht 5q" x; Ac,;( )turùioht, wboro Q5x; #;

Ikejhkr mrkf jh rofjdh ;

Mc,;( )ikejhkr 5q" x; Ac,;( )ikejhkr


13/13

- ;1 -

QEC 1111/ QW] 1111

]dtki mrkf cdr dho sjmo,

Mc 5 q" x; Ac,;( )ikejhkr + q"a Ac,a( )turùioht# q" x; Ac,;( )turùioht

Ac 5

Mc

q"Q

5

Mc

q"a

Ac 5x

;

aAc,;( ) ikejhkr + Ac,a( )turùioht"

x;

aAc,;( )turùioht (? ekrls)

x;

a

5>.;:1?

Ac,;( )ikejhkr 5

>.>6=

Pox;5

;.102

3";>?( )5>.>>;6; (0 ekrls)

Ac,a

( )turùioht

5

>.>6=

Pox; ?5

>.>6=

1.;";>3( ); ?

5>.>>160 (0 ekrls)

Ac,;( )turùioht 5>.>6=

Pox; ?

5

>.>6=

3";>?( )

; ?5>.>>?;6 (0 ekrls)

Ac 5 >.;:1? >.>>;6;( ) + >.>>160" >.;:1? >.>>?;6( ) 5 >.>>?>? (0 ekrls)

Cdr `dtb sjmo dc tbo kordcdji

Hot Ac 50 " >.>>?>? 5>.>;>; (0 ekrls)

aerodynamics questions and suggested answers 8

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