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KINEMATICS Un=
it 4 & % Dr John P. Cise, Profe=
ssor
of Physics, Austin Community College,, 1212 Rio Grande St, Austin Tx.,
78701 jpcise@austincc.edu & New York Times August 10, 2008 by Fred A Bernstein
Reaching for the Clouds in Dubai By FRED A. BERNSTEIN JUST over a year ago the of=
fice,
hotel and condo tower known as the Burj Dubai became the tallest building in
the world. But when its developer, Emaar Properties, announced that the Burj
had surpassed the 1,670-foot Taipei 101 Tower in Taiwan, it refused to say =
how
much higher the building would go. That set off a guessing game among
architects and developers who follow the tall-buildings equivalent of the a=
rms
race. A spire that is being built inside the tower has yet to be unveiled,
according to Emaar, which hopes to keep the guessing — and marketing
— game going until the building opens next year.
Skip to next paragraph
But in Chicago, Adria=
n Smith,
the building’s lead designer, says that the Burj Dubai is already
“in the past.” He predicts that a taller building will surpass =
it
within five years. And when the Burj Dubai cedes the title, it may well be =
to
another building by Mr. Smith, a blond bear of a man whose firm, Adrian Smi=
th
& Gordon Gill Architecture, has made a specialty of designing
“supertall” buildings, some as high as the Empire State Building =
and
the Chrysler Building put
together.
Already he is designing six other buildings over 100 stories =
in
the United Arab Emirates, including a futuristic three-pronged tower with so
many curving surfaces that it required technology created for Frank
Gehry.
Thanks to his oil-rich clients Mr. Smith has the ch=
ance
to create mammoth landmarks=
that will long outlive him; the risk is that these buildings, which are fre=
ed
from nearly all stylistic constraints, will look ridiculous, like alien
spacecraft that landed in the middle of the desert.
At 63 Mr. Smith is performing this high-wire act wh=
ile
building a big architecture firm essentially from scratch. When he led the
team that created the Burj Dubai, he was part of the Chicago office of Skid=
more,
Owings & Merrill, the blue-chip firm behind many of the world’s m=
ost
famous skyscrapers, from Lever House in New York to the Sears and Hancock
buildings in Chicago to the pagodalike Jin Mao Tower in Shanghai.
But after 39 years at Skidmo=
re,
including a stint as chief executive from 1993 to 1995, Mr. Smith left in 2=
006
to start a competing firm. That set off a struggle over bragging rights to =
the
Burj.
Preliminary: The BurjDubai is 818 meters tall. 3.28 ft. =3D 1 meter. Question: (a=
) If air
friction is neglected, find the time to fall to the base of the building? (=
b)
Again, neglecting air friction, find the speed (in ft/s, miles/hr., and m/s=
) after
falling to the base of the DubaiBurj skyscraper? Hint: g =3D 32 ft/s2<=
/sup>
, g =3D 9.8 m/s2 , 88 ft/s =3D 60 mph , Answer: (a) t =3D 12.92 s.,
(b) v <=
span
style=3D'mso-spacerun:yes'> =3D ~413.44 ft/s., 281.9 mph, ~ 126.62 m/s Comment: As of 8/10/08 the tallest
building being built in thye middle east will be 1400 m tall. That will be a
4592 ft or 0.87 miles high skyscraper.
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