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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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