2021 FCS 4E Physics Prelim P2

FUCHUNSECONDARYSCHOOLPRELIMINARYEXAMINATION2021SECONDARY4EXPRESS Candidatename Centrenumber S Indexnumber Class: PHYSICSPaper2Theory 6091/02 31August 20211hour 45minutesCandidatesanswerontheQuestionPaper. NoAdditionalMaterialsarerequired. READTHESEINSTRUCTIONSFIRST Writeyourname,centrenumber,classandindexnumberonthisQuestionPaper.Writeindarkblueorblackpen.YoumayuseanHBpencilforanydiagramsorgraphs.Donotusestaples,paperclips,glueorcorrectionfluid. SectionAAnswer allquestions. SectionBAnswer allquestions. Question11hasachoiceofpartstoanswer. Candidatesareremindedthat allquantitativeanswersshouldincludeappropriateunits.Theuseofanapprovedscientificcalculatorisexpected,whereappropriate.Candidatesareadvisedtoshowalltheirworkinginaclearandorderlymanner,asmoremarksareawardedforsounduseinPhysicsthanforcorrectanswers. Thenumberofmarksisgiveninbrackets[ ]attheendofeachquestionorpartquestion. For Examiner’sUseSectionASectionB Total /80

Nameofsetter:MdmRohizanTalib Thisdocumentconsistsof 18pagesand0blankpage. SectionA[50marks] Answer allthequestionsinthissection. 1 Fig.1.1showsalargemetalwasher. Thewasheris0.15cmthinkandtheinternalandexternaldiameterareshownonFig.1.1. Fig. 1.1(nottoscale) (a) Astudentusesarulertomeasuretheinternaldiameterofthewasher. (i) Describeonepracticalproblemintakingthismeasurement. ……………………………………………………………………………………………. …………………………………………………………………………………………[1] (ii) State the name of a measuring instrument that is used to take thismeasurementmoreaccurately. …………………………………………………………………………………………[1] (b) Themassofthemetalwasheris5.4g. (i) Calculatethevolumeofmetalinthewasher. volume=……………………………….[2] (ii) Calculatethedensityofthemetal. 2

density=……………………………….[2] 2 Fig. 2.1showsavelocity-timegraphforacarinitiallytravellingforwardinahorizontalstraightline. Fig. 2.1 (a) Describethemotionofthecar (i) betweenAandB, ……………………………………………………………………………………………. …………………………………………………………………………………………[1] (ii) betweenBandC, ……………………………………………………………………………………………. ………………………………………………………………………………………....[1] (iii) betweenEandF. ……………………………………………………………………………………………. …………………………………………………………………………………………[1] (b) Thecartravels133mwhenitreachespointC. Calculatehowfaristhecarfromthestartingpointattheendof50s. 3

distancefromstartingpoint=…………………………………….[2] 3 Fig.3.1showsahelicopterstationaryintheair. Verticalliftforcesareproducedbythefrontrotorandbythebackrotor. Fig. 3.1(nottoscale) Theweightofthehelicopteris150kN. HorizontaldistancesaremarkedonFig.3.1. (a) (i) Statewhatismeantbycentreof gravity. ……………………………………………………………………………………………. …………………………………………………………………………………………[1] (ii) Describethedifferencebetweenmassandweight. ……………………………………………………………………………………………. …………………………………………………………………………………………[1] 4

(iii) Determinethemassofthehelicopter. Thegravitationalfieldstrengthgis10N/kg. mass=………………………………….[1] 5

(b) (i) BytakingmomentsaboutpointX,calculatetheliftforcefromthefrontrotor. liftforce=……………………………………[2] (ii) Calculatetheliftforcefromthebackrotor. liftforce=……………………………………[1] (c) Thehelicopter