4E Pure Phy 2021 GE2 P1

O JURONGSECONDARYSCHOOL2021GRADUATIONEXAMINATION2SECONDARY4EXPRESS CANDIDATENAME CLASS INDEXNUMBER PHYSICS 6091/01Paper1MultipleChoice 1Sep20211hourAdditional Materials: MultipleChoiceAnswer Sheet READTHESEINSTRUCTIONSFIRST Donot openthisbooklet until youaretoldtodoso. Writeinsoft pencil.Donot usestaples, paper clips, highlighters, glueor correctionfluid.Write your name, class and index number on the answer sheet in the spacesprovided. Therearefortyquestionsinthispaper. Answer all thequestions.For eachquestion, therearefour possibleanswersA, B, C, andD.Choose the one you consider correct and record your choice in soft pencil on theseparateAnswer Sheet. ReadtheinstructionsontheAnswer Sheet verycarefully. Each correct answer will score one mark. A mark will not be deducted for a wronganswer.Anyroughworkingshouldbedoneinthisbooklet. Theuseof anapprovedscientificcalculator isexpected, whereappropriate. For Examiner’sUsePAPER1[40marks] Thisdocumentconsistsof18printedpagesincludingthispage.

2 1 What isthereadingshownonthemicrometer? A 3.13mm B 3.63mm C 7.13mm D 7.63mm 2 Whichgraphrepresentsthemotionof abodyfallingvertically? 6091/1/GE2/21 [Turnover]

3 3 Thevelocity-timegraphof anobject’smotionisshown. velocity/ ms -1 time/ s15-128 12 16 What isthedistancetravelledintheoppositedirection? A 24m B 60m C 72m D 132m4 Aman pulls a cart of mass 25 kgacrosslevel groundwithahorizontal forceof 60N.Aconstant forceof frictionof 20Nactsonthecart. What istheaccelerationof thecart? A 0.63m/s 2 B 1.6m/s 2 C 2.4m/s 2 D 3.2m/s 2 5 How is the motion of a body affected by balanced and unbalanced forces acting onit? balancedforces unbalancedforces A velocitychanges velocitychangesB velocitychanges velocityconstantC velocityconstant velocitychangesD velocityconstant velocityconstant 6091/1/GE2/21 [Turnover]

4 6 Ahangingbasket isfixedtoawall byasocket. Theweight of thebasket is80N. Theweight of thebracket is20N. What isthesizeanddirectionof theforceexertedonthebracket bythewall? sizeof force directionof force A 20N downwardsB 100N upwardsC 20N upwardsD 100N downwards 7 Some students measure the masses and volumes of different sized samples of atypeof wood. Whichgraphshowstheir results? 6091/1/GE2/21 [Turnover]

5 8 Auniformmetreruleisbalancedbya4.0Nweight asshown. What istheweight of themetrerule? A 0.8N B 1.0N C 4.0N D 40 N 9 Atractor isbeingusedonroughground. Whichisthesafest point for itscentreof gravity? 6091/1/GE2/21 [Turnover]

6 10 Four identical measuringcylinderscontainliquid. Twocontainwater of density1000kg/m 3 .Twocontainparaffinof density800kg/m 3 . Whichcylinder hastheleast pressureexertedonitsbasebytheliquidit contains? 11 Amanometer isconnectedtoagassupply. Pressurecanbemeasuredincmof water. What isthepressureof thegas? A 4cmof water morethanatmosphericpressureB 8cmof water lessthanatmosphericpressureC 8cmof water morethanatmosphericpressureD 12cmof water morethanatmosphericpressure 6091/1/GE2/21 [Turnover]

7 12 Amass hangs fromafixedpoint P. It startsfromposition1andswingstoposition2which is the furthest position on the opposite side. It then oscillates several timeswithdecreasingamplitudeuntil it comestorest at position3. Wheredoesthemasshavethemost kineticenergy? A at position1B at position2C thefirst timeat position3D thelast timeat position3 13 Energy from petrol is used to operate an engine. The engine drives a generator,whichproduceselectrical energy. What istheoverall efficiencyof theprocess? A 25% B 30% C 55% D 83 14 When a microscope is used to look at smoke particles in air, Brownian motion isobserved. What causesthesmokeparticlestomoveat random? A Smokeparticlesarehit byair molecules.B Smokeparticlesaremovedbyconvectioncurrentsintheair. 6091/1/GE2/21 [Turnover]

8 C Smokeparticleshavedifferent weightsandfall at different speeds.D Smokeparticleshit thewallsof thecontainer.15 Thediagramshowsasyringewithafixedpiston.Gasistrappedinthesyringe. Thepressureinthesyringeincreases. What happens to the temperature of gas and the collision frequency of the gasmoleculesinthesyringe? temperatureof gas collisionfrequencyof gasmoleculesA decreases decreases B decreases increases C increases decreases D increases increases 16 Samples of four different substances are heated inturnbythesameheater, for thesame time duration and in the sameconditions. Thetimetakenfor thetemperaturefor eachsampletoincreaseby5°Cisrecordedinatable. sample timefor 5°Crise/ saluminium 10copper 5plastic 800wood 1200 Whichmaterialsshouldbeusedtomakethebodyandhandleof afryingpan? body handleA aluminium plastic B aluminium wood C copper plastic D copper wood 6091/1/GE2/21 [Turnover]

9 17 Whichpointsarethefixedpointsof theliquid-in-glassthermometer shown? A thebeginningandendpointsof thecolumnof liquidB thepointsmarked–10°Cand110°CC thepointsmarked0°Cand100°CD thetopandbottompointsof thethermometer bulb 18 A2 kWkettlecontainingboilingwater isplacedonabalance. It isleft thereandthewater continuestoboil. Thebalancereadingchangesby0.20kg. Thespecificlatent heat of vaporisationof water is3000000J/ kg. Howlongdidthewater boil for? A 0.0033s B 300s C 300000s D 1200000s 19 Whenaliquidevaporates, somemoleculesescape. What is the effect on the kinetic energy of the liquid molecules and fromwheredothemoleculesescape? kineticenergyof liquidmolecules moleculesescapefromA decreases everywherewithintheliquid B decreases thesurfaceonly C increases everywherewithintheliquid D increases thesurfaceonly 6091/1/GE2/21 [Turnover]

10 20 The diagram shows the temperature-time graph for hot water that is cooling in anuninsulatedbeaker. The beaker is now insulated. The same volume of hot water, at the same initialtemperature as before, is put into the insulated beaker. The beaker is in the sameroomasbefore. Whichisthenewtemperature-timegraphfor thewater asit cools? 6091/1/GE2/21 [Turnover]