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Unformatted text preview: Comet The orbit of many comats is an ellipse, the Sun being at one fucus. Consider a comet with
an elliptic orbit whose maximum distance to 1113 Sun (aphcliun distance) is r... = E x 1U"; km. The minimum distanca [perihelion distance} is n: = E 1: ll]? km. Find the speed of the
unmet at the perihelinn posiﬁun. — —— —  «a
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gym : 1%Mg(7:?j — a)
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1 Y1 26M arr? "' gag—z, : 5 ‘Glrf’
Z
(L rinkf? r4:
6% = 1% m r? VALVE,“ 10 Escape Consider a small astemid efradiue BID1 km whose gravitatienal acceleration at the surface
is it") mfg. A small reek ie throw from the surface with a radial speed of 3H4 rate. a. How far from the surfaee does the melt go? 11. 1Ir‘t’hat initial radial speed would the reel: need to have te escape the asteroid? 'L.___ M _ _ it) Til—girls (3 R  C) 6pm] _ (5,11
3“ e
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{a Era E
“5:” 33 ii We
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5’) "2'3
B '1 _.[ = anew"SK : talcm
23¢
Ka’PJGlUDOW Planet X Your starshlp lands on mysten'ous planet X. As chief scienﬁstengineer, you make the
following measurements: a stone of mass 3M] kg thrown upward from the giound st
ltltl rru's returns to the ground in SJJIJ s; the circumference of the planet 31 the equator is
lull} x ltl5 km; and there is no appreciable atmosphere. :1. WI is the mess of the planet? it. If the stership goes into a circular orbit 2mm km shove the surface or the planet, l‘lﬂw
more}.r hours will it take the ship to complete one orbit? "s
P Two charges and spring Twe charges Q... = 2 WC and (2;; = 3 in: are placed on the :r—axie with at x. = t} and
x5 = 22 em. [a] Find lhe fume en Q}, due to Q” .
(it) Find the force en 9;, due to Q, . The charges Q" and Q; are new attached to the ends era spring wheee unetretehetl length
is an = 22 em. With the charges attached, the spring compresses to an equilibrium length
3] = 12 cm. ,___,_5.1_. . .  . aiii???"1"1*1'l7‘?"l‘i*‘fia . . . . . . . . . . . . .
9a 0e l——!
L"*1 {e} Calculate the spring constant Fe of the spring. (em a 11, (De 4—):
(w) *H” >
 «a; c: “Xe : 11W
. fﬂgiiﬁl.‘
.— '— ..
[ it}; 1Tb! he (“Kb“taf—
4 \{ﬁ _L
1“ l l0 Cn 'ID
: qwlbﬁ E12 : If”: C : C ( Chum};
rB‘l—rlf—tt'e'u . ,5 :‘H.’ FL}; (lg) gﬁqeﬂn. ———e Three Charges lﬁll%l
Ilial IllII Three changes are ﬁxeld in plaee as shown. The squares in the grid have sides of Iength
s = {1.24 m. The magnitude arc; is 3 MI, while the magnitude el‘ Q is 45 eff. What is the magnitude of the net three on q? _—x. _ J— 4 (Fay: ﬂ at.
7:: q £2 5&6?
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F); 2 ER IF F44 Q
r r' 1 ED
zﬂL—l‘h Fr Sl {EL}
1' Ji— __ __u.'I__
" Tt—‘L 7;: l L I) —
El 2 ET 1’“ jFt‘T
L ﬁﬁquu
O + 8 ST.
:%FL%§: mam
__ 1 —t
a}: 2x10 {1
_ Q ’ (ffxlD—EC‘
ED. 9‘9‘H M Three charges in a line Two charges IQIr and {2; [Qr = 5 ME} are ﬁxed en the x—axie at x = 6 cm and _r = E cm,
respectively. A third charge Q}, = 1 11C is ﬁxed at the crigin. A particte with charge q = 0.4 pf. and mass m = ti 3 is placed on the yaais aty = 14 cm
and released. There is he gravity. {:1} Calculate the initial acceleration of the particle. (11} What was the magnitude ef' the net electric force on e at its paint of release? E; : 2"“; {115.3% d1
i211?) u re 6 = 653‘:
Ci Mayhem) :. 16.1 am
e
i ‘i' M1541 ( EMU’chhKO trait) ()3
EL; QGZMO —— ‘toilmmjl rm ( CL'H— N171
= c3.ng M
at  ﬂat—:12 Maw
a q m 1 _——F EMU—EMU 5(ID'ZST, 1— 950.6?j)mf~1. {Em = [mi : 135m ...
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This homework help was uploaded on 03/27/2008 for the course PHYS 221 taught by Professor Herrerasiklody during the Fall '08 term at Iowa State.
 Fall '08
 HerreraSiklody
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