A2 Physics 物理 出国英语IAL_AS_Physics_SN_6.pdfVIP

EdexcelASPhysicsRevisionNote

for,

PearsonEdexcelInternationalAdvancedSubsidiaryinPhysics

Firstexamination2014

PearsonEdexcelGCEAdvancedSubsidiaryinPhysics

Firstexamination2009

ShawonIbnKamal

IALASPhysicsNote

Unit1:PhysicsontheGo

Chapter:Mechanics

1usetheequationsforuniformlyacceleratedmotioninonedimension,v=u+at,

222

s=ut+½at,v=u+2as

1.v=u+at

2

2.s=ut+½at

22

3.v=u+2as

2demonstrateanunderstandingofhowICTcanbeusedtocollectdatafor,anddisplay,

displacement/timeandvelocity/timegraphsforuniformlyacceleratedmotionand

comparethiswithtraditionalmethodsintermsofreliabilityandvalidityofdata

Motioncanberepresentedusinggraphs.Traditionally,datamighthavebeencollectedusing

rulersandstopwatches.ICTmethodsarenowreadilyavailable,forexampleusingamotion

sensor.

Thissetuprecordsdisplacementatregularintervalsandcanbeusedtocreategraphsof

displacementagainsttimeorvelocityagainsttime.Lightgatescanalsobeusedtomeasure

motion.Bothofthesemethodswilleliminatehumanerror,sotimeordisplacementwillbe

measuredmoreaccurately.Theyalsoallowgreaterprecisionthanstopwatches.Thedatawill

haveimprovedvalidityandreliability.Withlightgates,thelengthoftheobjectinterruptingthe

beam,orthedistancebetweenthegates,muststillbemeasuredmanually.

Experiment:Determinespeedandacceleration,forexampleuselightgates

Measuringspeedusinglightgatemethod

1.Attachacartofmeasuredlengthcentrallytothetopofthetoycar.

ShawonNotes|