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Unformatted text preview: Physics 2211 Quiz #4 Form #411 mm... ifuil'im Spring 290? Version A I Print your name. test form number {3 digits at the top of this form). and student number [9 digit, Georgia Tech ID:
number} in the section of the answer card labeled “Student Identiﬁcation." 1: Bubble the Tea! Form Number in columns 1—3. skip oolumn 4. then bubble your Student Number in columns 5—]3_ e ﬂeeresponse questions are numbered l—lIl. For each, make no marks and leave no space on your card. Show all your
work clearly. including all steps and logic. Box your antiFer. I Multiplechoice queﬁtions are numbered 15. For each. SEIECI the answer most nearly oorrectI circle this anewer on
your test. and bubble it on your answer card. Do not put any extra marl:5 on the card. I Turn in your test and simmer card as you leave. Your score will he posted under ‘Course Standing” when it has been
graded. Quiz grades become ﬁnal when the next quiz is given. a You may use a calculator that cannot store letters. but no other aids. 9mm = 9.8mm:
Unless otherwise directed. all Springs and cords are ideal. and drag should be neglected. I. {16 points} A small bomb of mass m is thrmvn vertically upward. When it reaches its maximum height.
it explodes into three parts. Immediately after the explosion. one part. with mass me. has a velocity of
+2001? + 2ﬂﬂjmfs. A second part. with mass mfﬁ. has a velocity of +4UU‘E — lﬂﬂjmfs. 'What is the volocity
of the third part? [On Earth.) An} Pfﬂk: ‘3 rqui‘i‘ﬂ‘i'tﬁinﬁl ﬁw‘e {I has ¢§HP¢er +0 «Q'ch
o'l: aﬁPloﬂh‘t ' Limiter mlweuﬁh :2: MEerVe cl.
4+ P {ad‘ I in only 1:! Minna. ﬁrillf 5+ip Pad!" m; menFun ﬂ i‘Efﬁ. i5;=i" ‘3 F" Pfx= Pig —e (3}: mm... emuH... ﬁmlv3£¥ Vang: _ mlvl'tx'  mlvlﬂx 1. '— —e “‘3 “it
— 'gﬂ‘? Mfr Pia: Pg: —‘! a : “.9143. l“I'vaqtu *“Jl’aey v  emf:  mm,  ("J’JJHWHH '(“3‘) FW“) i: M3 = "if: I“; A. Fbrrn ##11 Page 1 of5 Ii. [16 points] An amusement park ride {the spinning terror] eonsists in a large verticai drum of radius R1 which
spins so fast that everyone inside it stays pinned against the wall when the ﬂoor drops away. [This has not
yet oeeurrerl in the illustration.) The drum is spinning with angular velocity or. a person of mass m is pinned
against the wailr and the coefﬁcient of static friction between the person and the wall is #5. In terms of an}.r
or all of R, to, mi1 its, and physical or mathematical constants1 what is the magnitude of the foree that the
psison exerts on the waii'? {On Earth.) [year'in +9 E‘ﬁnof *‘ N
4?;  W: the
W ﬂan N: Mgr: Hut: “tth
E
N= FIth I
Fir1M _ "i" +5; 7%) i guinea l = iéi‘ kiwi1h
ptfiﬂ perin
Fran Nansenis 319i...» Fan's  "' perEn 1'7'7 [gari 5 (Flufde
Fe rSﬂI draw P1 r3!!! d nilran.
so 4 I. 'I 1
inorﬂuizvﬁ 1"” = [m3Pi(WHF)
Jean 1. [ﬁ points] In the problem above, consider a person in the drum who is momentarin at the extreme left of
the illustration. at the position marked with an asterisk {is}. At that moment. what is the direction of the
force that the person exeﬂs on the wali? [On Earth} [a [b] i ireetion ii. F'er I; we“ ch P‘r‘W
31; “an ref.1 {e} Direction iii. 3 i y {d} Direction :1. H. (e) Direction in. FHH 3" Lew} £0111: d1 wqﬂ'
'3' lppmi'lif. Form #411 Page 2 of 5 I I I . [113 points} Two 1.0 kg blocks are onnnected by Hope 1~ as illustrated. Hope 2 hangs beneath the lower block.
Each rope has a mass of 25113. That is1 the ropes are NOT ideal! The entire assembi}r is aooeierated upward at Mimi’s: by the force F applied to the top block. What is the tension at the top of Hope 1? {On Earth.) "The +0? in!“ rape ' mutt“ allelii’rﬂ‘ﬁt refit 1, Huh 3.. em! rage I up Hﬂﬂrt (lﬂ‘rJﬂ' yes... is one ohﬁ'ﬁt.
Ami, Mom 21" Lw no; ﬂﬁﬂmwnex T] e MexitW‘r nextM3 ﬁll w = 2. [6 points) How does the tension at the bottom of Rope 1 compare to that at. the top of Hope 1'? {a} The relationship between the tensions at the top and bottom of Hope 1
cannot be determined with the information provided. E91!“ anvil; for:
{b} Tension at the bottom of Hope 1 is the same as that at the top. "us. *4“? gm." Tension at the bottom of Hope 1 is ess t : that at t e op. {d} ension at the bottom of Hope 1 is greater t . n t at at the top. qgfpl'l‘ﬂ‘i'l'ﬁl‘ Form #411 Page 3 of 5 3. (it: points.) Twu hintks en a level frictionless table are that pushed from the left by e. eenstant horizontal
force of magnitude F, starting at rest. Next, the same two blocks are pushed from the right by a horizontal
force nf identical magnitude F, starting again at rest. if m1 :3 m2. hnw times the eentaet furee magnitude
between the blacks when pushed frem the right estimate to that when the:r are pushed from the left? fa] The eenLaet feree magnitude is the same when pushed from the right as when pushed from the left.
{hi The contact force magnitude is. reater when pushed fmrn t e right than when pushed from the left.
{e} The contact force magnitude is less when pushed from the right Lhan when pushed from the left. Wilt»; Fagin“; *pfam +l‘u? it'lf'i'if +h¢
:wﬂrl‘ ‘Fvﬂe (dime) Muesli" «(reinwit 441:. if??? “#35, H1. WHEN ?niiﬂei ‘Ff'm HM: rigid". Hue
rm iecl" FIT“: {wafﬂe} hiqu excels(.41:
like ﬁrst:an Maﬁa. M" The Giselereﬁll»! Mgﬂhﬂ“Jrﬁ hurl $39 “up. Same; as. {he 3'16!
Mﬁjwff‘tf‘if ampbe an! HI! hhf mu: m ﬁe 54mg. 4. {ll} points} Bill and Susan are each standing an identical skateboards [with excellent hall hearings], initially
at rest on level ground. Bill weighs. Linee times as much as Susan. He pushes herhaunted).r on Susan's heek.
rauﬁing her to start. moving away from him. In‘in‘iediatel}r efLei Bill steps pushing, and in the reference. frnnle ef the Earth. away,r from each other. and Susan‘s speed is nne—third that of Bill.
usan s spee is t tee times that of Bill. [a] Susan and Hill are IIlEiI't‘ill
[h] Susan ant ill are moving sittag.r frein eae ether1 [ei usen is lt‘lU'r'lllg away from Bill, and Ht] is statinner}:
[r1] Susan and Bill are moving awn},r From eaeh other at Equal speeds. NI? not ashrad form! 9M Breasts... Jya+rm. iiiam M “neuteri III we fear we J_ Perm #dll Page t of 5 5_ [11] points] Two halls, of diﬁerent known masses m1 and mg. are at rest in a tube with a reassiess compressed spring between them. When the spring is released. the hal] with mass m1 ﬂies out of the tube with a meaSured
speed V1. The spring is unusual1 in that it does not obeg.r Hooke’s Law, F = —Ftﬂs. Instead, it exerts a force F = 4:513“, where n is an odd integer. If the speed of the bali with mass mg is to he calculated. what
information about the spring is required? {a} The value of ii. is needed.
{b} The time for which the 5. ring acts is needed. Beg3m; [c] No information about the srin is needed.
[d] rI‘he total force applied by the Spring is needed. E
[Ei The impulse provided by the spring is needed. Ghoul» {ydrm 0? Led. toil: emf Hie mg I
EH5, The“ ﬁre at 159+ “hr”! "ff8i on i'i'. {Mm marIcahn“ v.5 (misread. No Ihﬁrngﬁh ‘Lﬁut
ih'i'rrmf 1'21"“: {I radiired. E. [it] points) Three cars, car X . car Y, and car 3, begin accelerating from rest. at the same time. Car X is
more massive than car Y. which is more massive than ear 3. The net force exerted on each car is identical.
After lﬂs~ which car, if any, has the greatest momentum magnitude? is.) rCar 2' has the greatest momentum magnitude.
[b] Car Y has the greatest momentum Ina itudo.
All three cars have the same momentum magnitude.
{:1} Car X has t e greatest momentum magmtu e. .a'i
D
u... Shno herre ﬂ’ oﬁpiu'i 4e and. car 451 Some 415‘; In Some iirpulW
i? egphr'j‘l‘ﬁ ﬁrth ﬂair. Emir (or he! Seine mornredone «always. Ali Ur}h .5qu (1FHP) r0 {Mylﬂ Mime‘5‘“. Form #411 Page 5 of 5 ...
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 Spring '08
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 Force, contact force magnitude, greatest momentum magnitude, force magnitude is., nf identical magnitude, eentaet furee magnitude

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