Version 001 test-1 swinney (57010) 1. is constant at m/s.

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1 Version 001 es-1 swinne (57010) 1 This prin-ou should hve 20 quesions. Muliple-choice quesions m coninue on he nex column or pge find ll choices before nswering. CubeUniVec1x poins Acubeis1.4fee onside, wihonecorner he origin. Wh is he uni vecor poining from he origin o he digonll opposie corner locion 1.4, 1.4, 1.4? A) 1,1,1 B) 1.4 3, 1.4 3, C) , , D) , , E) , , ) 1,0,0 G) 0,1,0 H) 0,0,1 I) 1.4,1.4,1.4 J) 1.4 2, 1.4 2, D 2. H 3. I 4. A 5. J 6. E 7. C 8. G 9. B 10. chnge of momenum vecor poins A plne wih mss of kg rvels roundsrinnerlcirculrobrbiinhe x plne s shown in he digrm. Is speed is consn m/s. C D Sr B Which rrow bes describes he direcion of P in going from B o C? 1. e 2. b d 5. f 6. h g 7. g. 8. c h f e IeriveLoopMI poins or n ierive clculion h deermines pricle s rjecor of moion in he presence of nonconsn force, which of he following phsicl quniies mus be upded in b d c A

2 Version 001 es-1 swinne (57010) 2 progrm loop (i.e., repeedl)? A) ne B) C) p D) r E) m pricle 1. A,B,D 2. B,D,E 3. A,B,C,E 4. C,D 5. A,C,D 6. A,B,D,E 7. B,C,E 8. A,B,C,D 9. A,D,E 10. A,B,C,D,E ProjecileReflecionMI poins A projecile is fired n ngle θ (mesured from horizonl) ino he ir from he ground. If he iniil se is jus fer lunch nd he finl se is jus before impc, which of he following semens re correc? Neglec ir resisnce. 1. Ib, II, IIIb 2. I, II, III 3. I, II, IIIb 4. Ib, IIb, III 5. I, IIb, IIIb 6. I, IIb, III 7. Ib, II, III 8. Ib, IIb, IIIb IIIb)R(θ) = R(90 o θ) AnoherErhMI poins How close would noher Erh hve o be o our Erh (cener-o-cener disnce) so h ou would weigh hlf of our curren weigh? Neglec roion. (In he figure, E1 is he grviionl force due o he Erh ou re snding on, E2 is he grviionl force due o he oher Erh, nd scle is he norml force which mesures our weigh. The condiion of he problem is h scle = 1 2 E1.) I)p fx = p ix Ib)p f = p i D D R E E2 scle II) p f = p i R E E1 IIb) p f p i Le R(θ) be he rnge s funcion of θ in degrees. Then III)R(θ) = R(θ+45 o ) 1. D = 2 2R E

3 Version 001 es-1 swinne (57010) 3 2. D = 2R E GM E 3. D = 4. D = R 2 E GM E R E 5. D = (2+ 2)R E 6. D = (1+ 2)R E 2GM E 7. D = 8. D = 9. D = R E 10. D = 3R E R 2 E 2GME R 2 E NewonsThirdLwMI03x poins You hold ennis bll bove our hed, hen open our hnd nd relese he bll, which begins o fll. A his momen, which semen bou he grviionl forces beween he Erh nd he bll is correc? A.The force onhe bll b heerh islrger hn he force on he Erh b he bll. 4. C 5. D 6. B NorhPolePeopleMI03p poins Suppose h ll he people of he erh go o he norh pole nd, on signl, ll jump srigh up. Esime he recoil speed of he erh. The mss of he erh is kg, nd here re lmos 7 billion people. Assume h he verge person hs mss of 67 kg, nd ech person jumps wih n iniil speed of 2.2 m/s e e e e e e e e e e-13 Answer in unis of m/s Two idenicl springs in prllel poins B. The force on he Erh b he bll is lrger hn he force on he bll b he Erh. C. The forces re equl in mgniude. D. The forces re no equl becuse he bll is in moion nd he Erh is pproximel sionr. L E. No enough informion is given. b 1. None of he bove 2. E 3. A Mg Two idenicl springs re in prllel. Ech spring hs one of is ends ched o he ceiling nd isoher end ched o weigh.

4 Version 001 es-1 swinne (57010) 4 The mss of he springs is negligible. Consider he siuion in which he weigh hs mss M nd he ssem is sreched b lengh b. Choose correc semens below I. The siffness of one spring is M g 4b Ib. The siffness of one spring is M g 2b II. The moun of srech in one spring is b 2 IIb. The moun of srech in one spring is b III. The moun of force long one spring is Mg 2 IIIb. The moun of force long one spring is Mg. 1. Ib, II, III 2. Ib, II, IIIb 3. Ib, IIb, III 4. I, IIb, III 5. I, II, III 6. Ib, IIb, IIIb 7. I, IIb, IIIb 8. I, II, IIIb HngingWireMI04p054-lGold poins A hnging wire mde of gold wih dimeer 0.09 cm is iniill 2.2 m long nd cubic omic srucure. When 70 kg mss is hung from i, he wire sreches n moun 1.1 cm. A mole (N A = oms) of gold hs mss of 197 g/mol, nd is densi is 19.3 g/cm 3. Use g = 9.8 m/s 2. Bsed on hese experimenl mesuremens, find he pproxime vlue of he effecive spring siffness of one ineromic bond in gold Answer in unis of N/m PushOnSsemMI04p046-lg 010 (pr 1 of 2) 10.0 poins Consider wo blocks of msses m 1 nd m 3, conneced b rigid rod (i.e., i does no ge sreched or compressed) of mss m 2, siing on fricionless surfce. The block m 1 is pushed b horizonl consn force. m 3 m 2 m 1 Wh is he ccelerion of he combined ssem? 1. = (m 1 +m 2 ) 2. = + + m 1 m 2 m 3 3. = (m 2 +m 3 ) 4. = m 1 +m 2 5. = m = ( ) 2 7. = + m 1 m 2 +m 3 8. = + m 1 +m 2 m 3 m 3 9. = 10. = m 2 +m 3

5 Version 001 es-1 swinne (57010) (pr 2 of 2) 10.0 poins Wh is he force on he rod due o he block of mss m 3? = + m 1 m 2 +m 3 m = = m 1 + m 2 + m 3 m = ( ) = + m 1 +m 2 m = (m 2 +m 3 ) = m 1 +m = m 2 +m = = (m 1 +m 2 ) Accelerion Time Grph poins Consider ocr whichmoveso herigh (posiive direcion) on horizonl surfce long srigh line. cr O + Which ccelerion-ime grph corresponds ohemoionofhecrifimovesowrdhe righ, while slowing down sed re. v None of hese grphs is correc. Projecile C poins A c chses mouse cross 0.74 m high ble. The mouse seps ou of he w, nd

6 Version 001 es-1 swinne (57010) 6 hecslidesoffheblendsrikeshefloor 1.4 m from he edge of he ble. The ccelerion of grvi is 9.81 m/s 2. Wh ws he c s speed when i slid off he ble? Answer in unis of m/s Skidding on he Ice poins An 800 kg cr skidding due norh on level fricionless ic rod 100 km/h collides wih 2310 kg cr skidding due es 79.9 km/h in such w h he wreckge sicks ogeher nd skid s shown in he picure. θ BouncingBllPlosTesQ poins A rubber bll is dropped from res ono he floor, ndbounces bck upohesmeheigh from which i sred. Ignore he force of fricion due o he ir. Which of he following ses of plos mos ccurel depic his moion? (The force plos depic he force on he bll b he environmen.) N 79.9 km/h 2310 kg v f 100 km/h 800 kg 4. A wh ngle Es of Norh do he wo coupled crs skid? Answer in unis of 5. Impulse due o orce poins A chrged pricle is ced upon b force of mgniude 120N over ime. Given h he iniil momenum is (15,10,0)kg.m/s nd h he finl momenum is (20,20, 10)kg.m/s, find nd he force (in Newons) s, (40,80, 80)N

7 Version 001 es-1 swinne (57010) s, (20,40, 40)N s, (20, 40,40)N s, ( 80,40,80)N s, (40,80,80)N s, ( 40, 80,80)N s, (80,40,40)N MomorceMI02x poins The x componen of he momenum of n objec is observed o increse wih ime: A = 0 s, p x = 50 kg m/s A = 1 s, p x = 60 kg m/s A = 2 s, p x = 70 kg m/s A = 3 s, p x = 80 kg m/s Wh cn ou conclude bou he x componen of he ne force cing on he objec during his ime? 1. ne,x is decresing wih ime. 2. ne,x is zero. 3. ne,x is incresing wih ime. 4. No enough informion is given. 5. ne,x is consn. riciononamovingblocktes2q 018 (pr 1 of 2) 10.0 poins A block of mss M is pulled on horizonl plnebforceofmgniude hmkesn ngle θ (θ > 0) wih respec o he horizonl surfce. The coefficien of kineic fricion for he surfce is µ. Wh is he force of fricion experienced b he block? 1. µm g 2. µ(m g cosθ +) 3. µ(m g sinθ) 4. µ(m g cosθ) 5. µ( +mg) 6. µ(m g + cosθ) 7. µm g 019 (pr 2 of 2) 10.0 poins If he mgniude of he force is iniill zero nd is hen slowl incresed, keeping he ngle θ fixed, wh is he vlue of which he block loses conc wih he surfce? 1. = M g cosθ 2. = M g sinθ 3. = M g nθ 4. = M g cosθ 5. = M g sinθ 6. = M g nθ 7. = µmg 8. = µm g cosθ Grvi on Plne X shor poins Plne X hs mss 6.57 imes h of he Erh nd rdius 2.7 imes he rdius of he Erh. Wh is he rio of he ccelerion due o grvi on he surfce of Plne X o he ccelerion due o grvi on he surfce of he Erh?

8 Version 001 es-1 swinne (57010) 8

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