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PHYS171_f11_exam_1_alt_solution

PHYS171_f11_exam_1_alt_solution - PHYS1'71 Exam 1(retake...

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Unformatted text preview: PHYS1'71 Exam 1 (retake) Fall 2011 Name: Student ID #: Short Answer Questions 1) You drop a tennis ball from rest, it bounces twice, then you catch it again. Sketch the position, velocity and acceleration vs. time. You will not be able to assign numbers to the curve, but make sure the slope and curvature is correct. (5 points) 2) A solid sphere made of copper (density 9000 kg/m3) has radius 3 cm with uncertainty 0.1cm. What is the mass of the sphere, and the uncertainty in the mass? [10 points] m: Va; figmi > gar/.03230o0052) a (.0219 9:4: a?) W‘ 9%: :férr'sry: cHTr = @- v; arrr7ov7; ({«rféOflzzpoOéooxJ =0”: M=6°>fol49*@ A 3) A particle starting from rest at t = 0 has acceleration given by a = 3 m/s3 t. Find the position of the particle at t = 2 sec. [5 points] 5U=Scrd+> 3%,;th 23231”- 5 Mrgw {gate/Jr poll—2,345 : #2,) am 4) A particle starts at the origin (0? + 0}”) m, travels at constant velocity 2 m/s to the point ( 0; + 2]) m then travels at 1 m/s to the point ( Oi + 1]) m. What is the average velocity vector and average speed? [5 points] a (9' )3 spar} 1": 6/6qu J 17%;, a C0,!) Ever b— «M 2n 4+ me We , . flaw (37\ {wad [M ai- lW/g *9 (S‘z’C, (up) C ~ ”MW - (rr/ fifxeeI/l 254; .. ' j 6013/thth if _, 05V /\ vr/oolr l t —; '25: a . 5 J h“: 0 @ M W “Mire ‘(ul-r (—qncL-el— ea- . Va > 3 2 % . 6 r—éLi: .5 H yam, ad! «7‘. 0M”; ““2- - a FNMA“ 76f 5:“ {7L Elli“, —¢;ru-_.‘~.) _/)10)‘n‘/I’w [2A.___7fr_ We“ x: X0 + was—t. l4l; Va C056 C! :- 0 + Uo(059 turd: '— \J 9: yo ‘I’ Uo) ~ ’25.: U», : U0 5'“ e .. {:2 (457’ O 3=0+ uosm9+_%: 5 Egg (“m/"J" ‘d— Monrd" 015 l 423(- ~ A , A (11 L;- Uo SM 9 [(450359) __ . 2—? fafib at Ll: 51"”er A 94 ' QR 2%lévée) _ [email protected]’_ \\ no»f _—_137.ém 47:2» ' is”. LVIOV W yaw/1 —-'- m wt! 3W _- _ -- e:a-/,:>éma‘ @ __ @9961 I _ CD _ A . , i ——J~dewml4“=—ZJ-Aww 1:20.: (fr/5, _ 994. fly m WV; 94 ‘4: + (W fili- _23“" (£9.73: )‘Yaud‘ ‘ l _ _/ I 916% 9&4 .. .. yrap+%‘..: &M{fifw%w¢wwz %1 ((udnx 8 o. 9‘ 7.2%: 0:. 9.3 + H—/ — ,1 —‘ , $175}? M if 2 ‘ _ _ _’ _ m2?" __ q: ”54/ 5: H9, 957-; _ 4%; mi +[~‘t))('2v3) —/+r 24—w— _ _ W __ 12 (—419) 2(4)) [.4— __ +: £— ’3?«‘f 4 _V.V. . A >- ,_;’6 9.3/ 4‘8 j‘z‘flt ”i 919,?" Vh'fl‘Aaf) [O‘rfif pajfhi’r-rmrlw‘r -»§Ma- E: 1,, _ _ Lawl 41m} = -I./45/ 77»; «ff LIL/lg, j_yo.,.d : 4:01} S‘Fr‘a’l 4" lavh.(.? . _ WV: ‘5‘]? “7! =7” “t"“é +(~?.25”7¢>(» “65> ’ "“6 + tum/j .- 2?.“ng gia— % Will/tau» a/‘l'hd‘t? fl+_ ULW" 7+1“) (‘5 (/90? :1 M4} = ””4 ‘ 9.679620 , .1. : Ltw/j __ ? [Q’Zj {59‘ ‘ {flail} 4+ 71,1 11".“ @ fl javn‘l 7flzagl 0."- (gym 94+ W6 ,, (‘on Al} O 95 9 Uk: V2.4,v 1'“ Qa(7‘~““> , ,7 , . :(st— Maw/aza— 239 , ms: ,¥ U : 2? + ”/5, A (0 69:9! V‘" {inc-UK cv-‘MU' W! (”/01 9“" 7K ,7'f‘w, Qé‘l‘ {( ORA. "9; U ._ V 1 — ”1960140) 5 91475)”? 7290439 . ”A 3.} = (IV/271 1* 17;? (”“5 _, ti @tcd/ifll'" “4' 23’: _ 6r 95175941 7 a»! ma!» ’ aw” +_=_ we +Qzém=aoz DUE“ (mm! .x= m ”(’1‘ 511-? M Kai/225?)? 355?ch .NA __ _ :1, TA}: n le (OWNER, WW“ ,Mzfiye gym/W961 _ my 2 .. _ . Co /) +2 0 6) : [Tms 6r 9‘) £5.“dfi5> :- Qt?“ 1) :D‘QNQ 44f “0‘74an ‘ycén’é _6r (0 wvi‘h".~ I ){f_ _ __ iffepi _ 10% ifw +34) 0‘3‘5 . .5) Dec-(4&3? 84”,, 5555* _ “‘0’. '7 Z'f’ ¢_ ”4‘" “Ir/l (C9 m-rl'r!) divuol (WNM‘ v-r’J-OP/f) at?“ X: )(p + ”3+ '6 E}: ,7“ _ _ _ _ (0M = 4035+ ,_ gfikfl fD/vc 61’" ”-— _ _ P1073} .iitifiL a =_ Q_ 3: _ “P” ”if: ’9 ‘ "16 _ \ _ _ . 5‘ _ ¢_ / . _ _ 4-2: N 12/ .‘ lu‘lrou _ _ + am: \ , 9.2. _ _ v1“: 2c>~ €“Zx(_¢‘_7_av_§w 5 m gfiwf , = @5" 2' 6&6: __ __ __ , 1,!vava ...
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