[PDF] Collegeboard SAT Physics Form 4IAC.pdf | Plain Text

- ---- -------------------------------------------------- PHYSICSTEST Note: Tosimplify calculations, youmay use g = 10 m/s2 forthe acceleration duetogravity atEarth's surface. Part A Directions: Eachsetoflettered choicesbelowreferstothe numbered questionsimmediately followingit.Select the one lettered choicethatbest answers eachquestion, andthen fillinthe corresponding circleonthe answer sheet.A choice maybeused once, morethanonce, ornot atall ineach set. Questions 1-2 E B The figure aboverepresents atrack onwhich an object slideswithout friction. Theobject isreleased from thetop ofthe track inthe position shown. (A) Point A (B) Point B (C) Point C (D) Point D (E) Point E 1. At which ofthe labeled pointsisthe object's potential energygreatest? 2. Atwhich ofthe labeled pointsisthe object's kinetic energygreatest? 4IAC Unauthorized copyingorreuse of any part ofthis page IsIllegal. i GO ONTOTHE NEXT PAGE> -138-

e PHYSICS TEST-Continued Questions 3-6 H A B c D A person t ows aball with aninitial speed Vo from thedeck ofahouse, inanyone ofthe four initial directions shown inthe diagrams above.Ineach casetheball isreleased ataheight H above theground. Airresistance is negligible. ' (A) Aonly (B) Bonly (C) Conly (D) Donly (E) Itis the same forallfour cases. 3. In which casedoes theball travel thegreatest horizontal distancebeforehitting theground? 4, In which casedoes theball have thegreatest speedwhenithits theground? 5. In which casedoes theball have thegreatest acceleration justbefore ithits theground? 6. In which caseisthe ball inthe airfor the longest time? Unauthorized copyingorreuse of any part ofthis page isIllegal. I GO ONTOTHE NEXT PAGE> -139-

---- ------- --~- ~ " . . :'!;,. ~ PHYSICS TEST-Continued Questions 7-8refer tothe following properties of light waves. Questions 9-10 I. Frequency II. Wavelength III. Speed (A) Ionly (B) IIIonly (C) Iand IIonly (D) IIand IIIonly (E) I,II, and III ~ L A block onafrictionless tabletopisattached toa horizontal springthatisfixed toawall, asshown above. Theblock ispulled tothe right. Choose answers tothe following questionsfromthesetof graphs below. 7. In vacuum, allcolors lighthave thesame value fowhich ofth roperties? (A) (B) 8. When lightpasses fromairinto glass, which of the properties changes? (C) (E) 9. Which graphrepresents themagnitude ofthe linear restoring forceasafunction ofthe block's displacement fromitsequilibrium position? 10. Which graphrepresents theelastic potential energy storedinthe spring asafunction ofthe block's displacement fromequilibrium? Unauthorized copyingorreuse of any part ofthis page isillegal. I GO ONTOTHE NEXT PAGE> -140-

PHYSICS TEST-Continued Questions 11-12 A particle movesalongthexaxis andisacted on by anet force directed alongtheline ofmotion. Possible graphsofvelocity Vx asafunction oftime t are shown below. Allgraphs aredrawn tothe same scale. O l------'--ttl I---yt.'---'--_ t O l------'--t tl 11. Which graphisNOT possible foraforce thatis constant inmagnitude anddirection? 12. Which graphdescribes asituation inwhich the velocity ofthe particle changes direction between t = 0 and t = t 1 ? Unauthorized copyingorreuse of any part ofthis page isillegal. I GO ONTOTHE NEXT PAGE> -141-

PHYSICS TEST-Continued Questions 13-15 The following diagramseachrepresent anisolated charge+Qatthe center ofthe circle shown. Ineach case, a test charge +qismoved fromrestatXtorest atYby anexternal forcealong thepath shown. ,-----, " "- " "- / , / , I , I , I \ : •Y••• 4"--"~ X I +Q '+q \ I , I \ I , / , / , / •....... ...." ------ X,+q I I I I / " .," -----", • +Q I II ill (A) Ionly (B) ill only (C) Iand IIonly (D) IIand ill only (E) I,II, and ill 13. The network donebythe external forceismaxinium inwhich ofthese cases? 14. No net work isdone bythe external forceinwhich ofthese cases? 15. The electric potential at Y is higher thanatXinwhich ofthese cases? I GO ONTOTHE NEXT PAGE> Unauthorized copyingorreuse of any part ofthis page isIllegal. -142-

PHYSICS TEST-Continued Questions 16-17 Questions18-19refertothe following typesof images thatmay beformed whenanobject is placed infront ofalens ormirror.' The statements belowdescribe experimental observations ofprocesses involvingelectrons. I.Real image, largerthantheobject II. Real image, smaller thantheobject III. Virtual image (A) Ionly (B) IIIonly (C) Iand IIonly (D) IIand IIIonly (E) I,II, and III I. An electric currentpassest ough agas, and a characteristic spectrumisobserved. II. Electrons arescattered fromthesurface ofa metal, andadiffraction patternisobserved. III. Electrons aredislodged fromametal surface that hasbeen struck byphotons, andthe energy ofthe electrons ismeasured. (A) IIonly (B) IIIonly (C) Iand IIonly (D) Iand IIIonly (E) I,II, and III FrontsUrface~~ of mirror ~ 16. Evidence forthe particle natureoflight is provided bywhich ofthe observations? 17. Evidence thatanelectron needsaminimum energy toleave asurface isprovided bywhich of the observations? 18. Which ofthese types ofimages canbeformed by the convex mirrorshown above? 19. Which ofthese types ofimages canbeformed by the converging lensshown above? I GO ONTOTHE NEXT PAGE> Unauthorized copyingorreuse of any part ofthis page IsIllegal. -143-

---- - PHYSICS TEST-Continued Questions 20-21 Standing wavesareproduced onthe strings ofa guitar. Thefollowing representpossiblecomparisons of the fundamental frequencyandthefundamental wavelength ofthe waves whenachange ismade. Frequency (A) Lower (B) Lower (C) Stays thesame (D) Higher (E) Higher Wavelength LongerStays thesame Shorter Shorter Stays thesame For each ofthe following situations, indicatehow the second standing wavecompares tothe first standing wave. 20. The guitarist firstplucks athin string andthen a thick string, wherebothstrings arethe same length andunder thesame tension. 21. The guitarist plucksastring, thentightens itand plucks itagain. i GO ONTOTHE NEXT PAGE> Unauthorized copyingorreuse of any part ofthis page isIllegal. -144-

I):.~: .. .,., I~; PHYSICS TEST-Continued PartB Directions: Eachofthe questions orincomplete statementsbelowisfollowed byfive suggested answersor completions. Selecttheone that isbest ineach caseandthen fillinthe corresponding circleonthe answer sheet. 22. Which ofthe following isacorrect unitforthe coefficient offriction f.1 ? (A) Newton (B) Kilogram (C) Newtonlkilogram (D) Kilogram/newton (E) Nounit; f.1 isadimensionless quantity. 23. A rocket-powered sledisaccelerating alonga straight, leveltrack withaconstant acceleration of magnitude 20meters persecond squared. By how much willthespeed ofthe sled change in 3.00 seconds? (A) 7 m/s (B) 10 m/s (C) 20m/s (D) 60m/s (E) 90m/s JL.....- __ -.:::.T-..~-- 24. The block shown aboveispulled overarough horizontal surfacebythe tension forceTinthe string. Thevelocity ofthe block doesnotchange and therefore itmay becorrectly inferredthat (A) theinertial massofthe block isinfinite (B) theinertial massofthe block iszero (C) theforce duetofriction andthetension are equal inmagnitude (D) theblock willcontinue tomove ataconstant velocity ifT isreduced tozero (E) thisconstant velocitycondition canbe maintained byatension ofany desired value - Unauthorized copyingorreuse of any part ofthis page isIllegal. -145-25. A2-kilogram boxisplaced onascale inan elevator. Whentheelevator isnot moving, the reading onthe scale is20 newtons. Whenthe elevator isaccelerating upwardat2m/s2, the reading onthe scale willbemost nearly (A) 40N (B) 24N (C) 18N (D) 17N (E) 4N 26. The observation ofdiffraction patternsproduced when monoc omatic lightisincident onnarrow slits provides evidence forwhich ofthe following? (A) The particle natureoflight (B) The wave nature oflight (C) Polarization (D) Thelawofreflection (E) Thelawofrefraction 27. The phenomenon responsibleforthe separation of colors inthe formation ofarainbow isalso the cause ofwhich ofthe following? (A) Colors inathin soap film (B) Colors onaprinted page (C) The colors seenonacompact disc(CD) (D) Spectra observed withdiffraction gratings (E) The spectrum formedbyaglass prism I GO ONTOTHE NEXT PAGE>

PHYSICS TEST-Continued 0.2 ,-., 0.1 S '-' Q) "e a 0 .•..• - ~ -0.1 -0.2 0 5 10 1520 Distance (m) 25 28. Asmall corkmoves undertheinfluence ofawater wave, whose shapeataparticular timeisshown in the graph above. Ifthe wave hasaspeed of 2.0 meters persecond, howlong does ittake for the cork tomake onecomplete oscillation? (A) 12.5 s (B) 10 s (C) 5.0 s (D) 2.5 s (E) 0.40s 29. Anastronaut ison aplanet whose massistwice the mass ofEarth andwhose diameter isthe same as Earth's diameter. Theastronaut's weighton this planet is (A) four times whatitis on Earth (B) twice whatitis on Earth (C) thesame asitis on Earth (D) one-half whatitis on Earth (E) one-quarter whatitis on Earth Unauthorized copyingorreuse of any part ofthis page isillegal. v (m/s) 3 1 2+--- . o l-..J..-...l....J..-L....J.5--'- •...•.•....•.•1••.. 0...J.-L--'--'-1-'-=5...l....J.....J.-L-:'2':-0 t(s) 30. Atoy train undergoes t eeperiods ofconstant speed, asshown inthe graph above: 6seconds moving at2meters persecond, 4seconds standing still,and 10 seconds movingat 3 meters per second. Theaverage speedofthe train for these 20 seconds ismost nearly (A) 2.1 m/s (B) 2.4 m/s (C) 2.5 m/s (D) 2.6 m/s (E) 3.2 m/s I GO ONTOTHE NEXT PAGE> -146-

PHYSICS TEST-Continued Questions 31-33 v C D 34. Anobject ofmass misinitially attemperature To. Anamount ofheat Qisabsorbed bythe object, raising itstemperature to T f. What is the specific heatofthe object? 2v 5f6t (A) -.lL mTo -v (B) .z mT f (C) Q m(T f - To) (D) mQ T f - To (E) mQ T f -z» Velocity Vx versus timetfor anobject moving along thexaxis isgraphed above. 31. The object isinstantaneously atrest forwhich of the points? (A) None (B) Bonly (C) Conly (D) Band E (E) CandD 32. The magnitude ofthe object's acceleration is a minimum inthe region between whichtwo points? (A) Aand Bonly (B) Band Conly (C) Aand C (D) CandD (E) Dand E 33. At which pointisthe object thegreatest distance from itsposition att = 0 ? (A) A (B) B (C) C (D) D (E) E Unauthorized copyingorreuse of any part ofthis page isillegal. I GO ONTOTHE NEXT PAGE> -147-

Questions38-39 PHYSICS TEST-Continued Questions 35-37 A heat engine isrepresented inthe figure below. During eachcycle theengine absorbs 600joules of thermal energyfromtheheat source andexhausts 500 joules ofthermal energytothe heat sink. ¢ Heat Sink 270K Heat ¢ Source 360K Work 35. How much workisdone bythe engine during each cycle? (A) 100J (B) 500J (C) 550J (D) 600J (E) 1,100J 36. Ifthe engine operates at20 cycles persecond and does Xjoules ofwork during eachcycle, which of the following isan expression forthe power generated bythe engine? X 20 20 X (C) (20)(X) watts 60 (A) watts (B) watts (D) (20)(X) watts (E) (20)(60)(X) watts 37. Ifthe temperatures ofthe heat source andheat sink are360 Kand 270 K,respectively, whatis the theoretical (ideal)maximum efficiencyof the engine? (A) 17% (B) 25% (C) 36% (D) 75% (E) 100% Unauthorized copyingorreuse of any part ofthis page IsIllegal. I': , " " , " , " , " , i l I I I f I I ,,' I I ~- __--"'_L_ ... J ---------- The figure above depicts athick glassmuginitially at room temperature inwhich asensitive liquid-in- glass thermometer hasbeen placed. Astudent pours very hotwater intothemug. 38. The student carefully observesthereading onthe thermometer andsees thatitinitially dropsand then gradually rises.Thestudent's observations can beexplained bywhich ofthe following? (A) The liquid inthe thermometer contractsand then expands. (B) The glass ofthe thermometer contractsand then expands. (C) The thermometer glassexpands afterthe liquid inside itexpands. (D) The thermometer glassexpands beforethe liquid inside itexpands. (E) None ofthe above 39. Soon afterthehot water ispoured intotheglass mug, themug cracks open.Thisismost likely due to which ofthe following? (A) The outer wallofthe mug expands beforethe inner walldoes. (B) The inner wallofthe mug expands beforethe outer walldoes. (C) The outer wallofthe mug contracts before the inner walldoes. (D) The inner wallofthe mug contracts before the outer walldoes. (E) The hotwater putspressure onthe mug. I GO ONTOTHE NEXT PAGV -148-

y PHYSICS TEST-Continued 40. Two samples ofan element areprepared, each containing adifferent isotopeofthat element. Which ofthe following properties ofindividual neutral atomsisNOT thesame forboth samples? (A) Atomic mass (B) Atomic number (C) Number ofprotons (D) Number ofvalence electrons (E) Total number ofelectrons 41. Aspaceship istraveling towardtheEarth at a speed of2x 10 8 meters persecond whenit fires alaser pulse directly atthe Earth. Whatwill observers onEarth measure thespeed ofthe laser pulse tobe? (A) 1.0 x 10 8 mls (B) 2.0x 10 8 mls (C) 2.5 x 10 8 mls (D) 3.0 x 108 mls (E) 5.0 x 10 8 mls 42. According topresent experimental evidence, which ofthe following istrue ofprotons and electrons? (A) Their charges areofthe same sign. (B) They havethesame mass. (C) They arenot known todecay. (D) They areboth made ofquarks. (E) They areabout thesame size. 43. Correct statements aboutatomic nucleiinclude which ofthe following? I. Two nuclei withthesame charge contain the same number ofprotons. II. Nuclei arepositively charged. III. The nucleus contains asmall fraction ofthe mass ofan atom. (A) Ionly (B) IIIonly (C) Iand IIonly (D) IIand IIIonly (E) I,II, and III Unauthorized copyingorreuse of any part ofthis page IsIllegal. 44. Equal charges areplaced ontwo identical conducting ballsthataresuspended froma common pointbyvery longstrings, asshown above. Whentheyreach equilibrium, theballs are atan angle ()from thevertical. Athird identical, butuncharged ballistouched tothe charged ballonthe left and then removed. Which of the following showsapossible positionforthe balls when theyagain reach equilibrium? (A) (B) 1\ I I (C) A\ I I (D) ! (E) I GO ONTOTHE NEXT PAGE> -149-

PHYSICS TEST-Continued + 45. Two charged particles inauniform electric field between twolarge parallel platesareatthe positions shownabovewhentheyaresimultane- ously released fromrest.Ifthe two particles reach the negative plateatthe same time, onecan definitely concludethatthey have thesame (A) charge only (B) mass only (C) charge andmass (D) product ofcharge andmass (E) ratio ofcharge tomass 46. The force onastraight current-carrying wireina magnetic fieldthatisperpendicular tothe wire depends onwhich ofthe following? I. Strength ofthe magnetic field II. Current inthe wire III. Length ofthe wire inthe field (A) Ionly (B) IIIonly (C) Iand n only (D) n and IIIonly (E) I,n, and III Unauthorized copyingorreuse of any part ofthis page IsIllegal. e 0 o 6) 0 0 .p Tabletop G)G) e 00 e 47. Anumber ofsmall magnetic compasses ona wood tabletop areoriented asshown above. These compasses aremost likely situated (A) around acurrent-carrying wirepassing perpendicularly t oughahole inthe table atpoint P (B) between twomagnetic poles,anorth pole directly abovethetable frompoint P and a south poledirectly beneath point P (C) between twomagnetic poles,asouth pole directly abovethetable frompoint P and a north poledirectly beneath point P (D) inauniform magnetic fieldparallel tothe tabletop anddirected tothe right (E) inauniform magnetic fieldparallel tothe tabletop anddirected tothe left I GO ONTOTHE NEXT PAGe) -150-

fl6I\ \fII:I PHYSICS TEST-Continued • •50. Abar ofconducting metalmoves withspeed v in auniform magnetic fieldB.Inwhich ofthe following situationswilladifference inelectrical potential existbetween end1and end 2of the bar? • • • • • • ··-v--C±) (A) x :~ x xx B (into page) x • •• • • • • • B (out ofpage) (B) :~:x xx 48. A positively chargedparticlemovestothe left t ough amagnetic fieldBthat isdirected outof the page, asshown above. Whatisthe direction of the force exerted onthe particle bythe magnetic field? (A) Toward theleft (B) Toward theright (C) Toward thetop ofthe page (D) Into thepage (E) Out ofthe page x B (into page) x (C) x x X II 2~ X Xx B (into page) x xx 49. Which ofthe following statements istrue ofa transformer? (A) Ituses aniron core toreduce themagnetic flux linkages between theprimary and secondary coils. (B) The voltage induced inthe secondary coilis due tothe changing magneticfluxsetupby a changing currentinthe primary coil. (C) Itis aDC device thatisbased onaresistor used tocontrol current. (D) Itis an AC device thatisbased onacapacitor used tocontrol voltage. (E) Itis an electric motorrunbackward. (E) I GO ONTOTHE NEXT PAGE> Unauthorized copyingorreuse of any part ofthis page isillegal. -151-

PHYSICS TEST-Continued 51. Why doesourcalendar usuallyinclude aleap year every fouryears? (A) The Moon's orbitaround Earthisan ellipse, so itcauses Earthtowobble. (B) The period ofEarth's orbitisnot aninteger multiple ofthe period ofEarth's rotation on its axis. (C) Asother planets passbyEarth, theycause a continual decreaseinEarth's orbitalspeed. (D) Theperiod ofEarth's orbitchanges because its orbit iselliptical. (E) Friction duetotides causes Earthtorotate faster onitsaxis. Period 53. The wavelength ofawave isplotted versus its period onthe graph above. Which ofthe following graphsbestrepresents thewavelength versus thefrequency? 52. Insome designs forhigh-speed, magnetically levitated trains,therearesuperconducting electromagnets inthe bottom ofeach car.This design ischosen because, whencompared to conventional electromagnets, superconducting electromagnets (A) useless electrical power (B) areless expensive tomanufacture (C) operate atcooler temperatures (D) allow thetrain torun more smoothly over the track (E) decrease themagnetic fieldrequired to levitate thetrain Frequency (B) ...s:: •... OJ) t:: Q) - Q) ~ ~ Frequency (C) .s OJ) •• t:: Q) - Q) > (I;j ~ Frequency (D) ...s:: •... OJ) t:: Q) - Q) > (I;j ~ Frequency (E) ...s:: •... 00 t:: Q) '0 > (I;j ~ Frequency I GO ONTOTHE NEXT PAGE> Unauthorized copyingorreuse of any part ofthis page IsIllegal. -152-

I PHYSICS TEST-Continued 54. The speed oflight inaglass prism varies withthe (A) frequency ofthe light (B) angle ofincidence (C) intensity ofthe light source (0) distance between thelight source andthe pnsm (E) polarization ofthe light 55. The bottom halfofaconverging lensiscovered so that light from anobject canonly passt ough the top half ofthe lens. What image willappear on ascreen onthe opposite sideofthe lens? (A) The entire object (B) The tophalf ofthe object only (C) The bottom halfofthe object only (0) Abright spot (E) Noimage; thescreen willbedark. 56. Awave hasafrequency of60 hertz. Which other property ofthe wave canbedetermined fromthis information alone? (A) Speed (B) Amplitude (C) Wavelength (0) Period (E) Intensity Unauthorized copyingorreuse of any part ofthis page IsIllegal. Questions 57-58 In an experiment, astudent hasconnected t ee initially uncharged capacitorsandabattery, asshown in the figure above. 57. What isthe equivalent capacitance ofthe circuit between pointsAand B? (A) 3.2pF (B) 4.0 pF (C) 5.8pF (0) 8.0pF (E) 20 pF 58. What arethe voltages acrossthecapacitors after equilibrium hasbeen reached? C 1 C 2 C 3 (A) 3V 6V 3V (B) 3V 6V 6V (C) 6V 3V· 3V (0) 6V 6V 6V (E) 6V 12V 12 V i GO ONTOTHE NEXT PAGE> -153-

PHYSICS TEST-Continued Questions 59-60 To confirm Ohm'slaw,anexperiment isperformed withabattery, anammeter, avoltmeter, afixed-value resistor, andavariable resistor. 59. Which ofthe following circuitswouldallowyoutotake appropriate measurements toverify Ohm's law? (C) (D) ..-----11----. (E) ..--011-----. I GO ONTOTHE NEXT PAGE> Unauthorized copyingorreuse of any part ofthis page IsIllegal. -154-

PHYSICS TEST-Continued (B) 3.00 2.00 1.00 (E) 3.00 2.00 1.00 60. IfRisresistance, Visvoltage, andIiscurrent, whichofthe following showsarelationship betweenthe graphed quantities thatisconsistent withOhm's law?(Ineach case, assume thethird quantity isheld constant.) (A) V Unauthorized copyingorreuse of any part ofthis page Isillegal. 3.00 V (C) V 2.00 1.00 L...-_+--_+--_+-- ••.[ 1.0 2.0 3.0 (D) R 3.00 3.00 2.00 1.00 L...-_+--_+--_+-- ••.[ 1.0 2.0 3.0 2.00 1.00 L...----I---+---+_I L...-_+---+---r>-- ••.[ 1.0 2.0 3.0 1.0 2.0 3.0 R L...-_+--_+--_+-- ••.[ 1.0 2.0 3.0 I GO ONTOTHE NEXT PAGE> -155- ~-

-- ------- ----- ~~ .. ~-----------~ PHYSICS TEST-Continued 61. Todetermine thepower dissipated byaresistor, a student obtained thefollowing data. Potential difference acrossresistor: 10.0 volts ± 5% Current t ough resistor: 2.0 amperes ± 25% If the power isexpressed as20 watts ±x%, x is most nearly (A) 15% (B) 20% (C) 25% (D) 30% (E) 125% 62. Asteel spring withnonzero masshaszero elastic potential energywhennoforces areexerted onit. A mass isattached toone endofthe spring and allowed tooscillate onahorizontal, frictionless tabletop. Truestatements aboutthespring include which ofthe following? I. When thespring iscompressed, itwill have elastic potential energygreater thanzero. II. When thespring isstretched, itwill have elastic potential energygreater thanzero. III. The spring willalways havezerokinetic energy. (A) Ionly (B) IIonly (C) IIIonly (D) Iand IIonly (E) I,II, and III Unauthorized copyingorreuse of any part ofthis page isIllegal. Questions 63-64 A foam ballisdropped fromatall tower. Assume that there isno wind butthat airresistance isdirectly proportional tothe ball's speed. 63. Which ofthe following istrue about theball's motion forashort timeafter itis released? (A) Itspotential energyremains constant. (B) Itsspeed decreases. (C) Itsacceleration decreases. (D) Itsacceleration isconstant butnotzero. (E) Itsacceleration iszero. 64. When theairresistance onthe ball equals the force ofgravity onit,the ball hasaconstant (A) velocity (B) total energy (potential andkinetic) (C) nonzero netforce acting onit (D) acceleration ofmagnitude greaterthanzero but less than g (E) acceleration ofmagnitude equalto g I GO ONTOTHE NEXT PAGE> -156-

PHYSICS TEST-Continued 65. Which ofthe following describestheconditions under which thetotal momentum ofasystem of particles isconserved? (A) Only whenever energyisalso conserved (B) Only whenever nonet external forceactson the system (C) Only whenever nonet internal forceactson the system (D) Only whenever theparticles collide elastically (E) Only whenever theparticles collide inelastically 66. What isthe centripetal forceonanobject ofmass 4 kilograms travelinginacircular pathwith a radius of20 meters ataspeed of2meters per second? (A) 160N (B) 40N (C) 5N (D) 0.8N (E) 0.1N 67. Inan electron microscope, thebeam ofelectrons is focused by (A) gravitational forces (B) magnetic fields (C) aglass lens (D) aparticle accelerator (E) semiconductor diodes Unauthorized copyingorreuse of any part ofthis page IsIllegal. Questions 68-69 A person standsonasled onafrozen lake.The friction between thesled andtheiceisnegligible. Initially, theperson andthesled aremotionless. The person thenwalks onthe sled toward adock, asshown above. 68. While theperson iswalking onthe sled, howdo the person andthesled each move withrespect to the dock? Sled Toward thedock A way from thedock Does notmove Toward thedock Does notmove 69. Before reaching theend ofthe sled, theperson stops walking. Whichofthe following describes the velocity ofthe person andthesled with respect tothe dock aftertheperson hasstopped walking? ZeroA way from thedock Toward thedock A way from thedock Toward thedock • I GO ONTOTHE NEXT PAGE> Person (A) Toward thedock (B) Toward thedock (C) Toward thedock (D) Does notmove (E) Does notmove Person (A) Zero (B) Zero (C) Away fromthedock (D) Toward thedock (E) Toward thedock -157-

--- -- - PHYSICS TEST-Continued 8 8m1S 0.2 kg • 8 2m1S l.0 kg • 71. Atthe instant showninthe following diagrams, an object thatismoving horizontally tothe right with velocity vis acted onby anet force F. In which ofthese cases isthe kinetic energyofthe object notchanging? 70. A0.2-kilogram disksliding at 8 meters persecond on atable withnegligible friction,asshown above, strikes al.O-kilogram disksliding at2meters per second inthe same direction. Afterthecollision, the 0.2-kilogram diskslides backward at2meters per second. Whatisthe speed ofthe 1.0-kilogram disk after thecollision? (A)~ ~F (A) 1.2 m/s (B) 2.0mls (C) 3.2 mls (D) 4.0mls (E) 8.0 mls (B) ~. F~ ~)~ F (E) F Unauthorized copyingorreuse of any part ofthis page isillegal. I GO ONTOTHE NEXT PAGE> -158-

~ . . . iibt PHYSICS TEST-Continued 1-1.---- D----1°1 Note: Figure notdrawn toscale. 72. The figure aboveshows thetrajectory ofasoccer ball kicked byaplayer. Thespeed withwhich the ball leaves theplayer's footisvo' The initial angle between atangent tothe trajectory andthe horizontal is ()o, which canbeany angle between 0 0 and 90 0• If air resistance isnegligible, which of the following iscertain toincrease boththe distance Dofthe kick andthetime theball isin the air? (A) Increasing both Vo and ()o (B) Increasing Vo and decreasing ()o (C) Increasing Vo and keeping ()ounchanged (D) Keeping Vo unchanged andincreasing ()o (E) Keeping Vo unchanged anddecreasing ()o Unauthorized copyingorreuse of any part ofthis page isillegal. Target Area Slit Beamof \ Particles ••. • 73. Particles enteraslit inarotating drumofknown diameter androtation speed,asshown above. They strike thedarkened regionofthe target inside thedrum, which isat aknown anglefrom the slit. With noadditional data,thisexperiment can beused todetermine whichofthe following properties ofthe particles? (A) Mass (B) Speed (C) Charge (D) Momentum (E) Energy I GO ONTOTHE NEXT PAGE> -159-

PHYSICS TEST-Continued ® 75. Acar isbeing pushed upahill and moves with constant velocity. Whatisthe direction ofthe net force acting onthe car? (A) Upthe hill inthe direction ofthe push (B) Down thehill inthe direction ofthe frictional force (C) Perpendicular tothe hill inthe direction of the normal force (D) Straight downinthe direction ofthe gravitational force (E) The netforce hasnodirection becauseitis zero. 74. Two planets thatarefarapart havethesame mass, butplanet Y has aradius 3times thatof planet X,asshown above.If a isthe magnitude of the acceleration duetogravity onthe surface of planet X,what isthe magnitude ofthe acceleration duetogravity onthe surface of planet Y? (A) 9a (B) 3a (C) a (D) a/3 (E) a/9 STOP IF YOU FINISH BEFORE TIMEISCALLED, YOUMAYCHECK YOURWORK ONTHIS TEST ONLY. DO NOT TURN TOANY OTHER TESTINTHIS BOOK. Unauthorized copyingorreuse of any part ofthis page isillegal. -160-