j
Pleasejwritejclearlyjinjblockjcapitals.
Centrejnumber Candidatejnumber
j
Surname
j
Forename(s)
Candidatejsignat ure j
A-level
PHYSICS
Paper 3 j
Section B j Engineering physics
j
Thursday 14 June 2018
j j j Morning Time allowed: The total time forboth s
j j j j j j j
ections of this paper is
j j j j
Materials
Forjthisjpaperjyoujmustjhave: 2 hours. You are advised tosp
j j j j j j
ajpenciljandjajruler end approximately
j
ajscientificjcalculator
ajDatajandjFormulaejBooklet.
50minutesonthissection.
j j j j
Instructions
ForjExaminer’sjUse
Usejblackjinkjorjblackjball-pointjpen.
Filljinjthejboxesjatjthejtopjofjthisjpage. Question Mark
Answerjalljquestions. 1
Youjmustjanswerjthejquestionsjinjthejspacesjprovided.jDojnotjwritejoutsi
2
dejthejboxjaroundjeachjpagejorjonjblankjpages.
Dojalljroughjworkjinjthisjbook.j Crossjthroughjanyjworkjyoujdojnotjwant 3
tojbejmarked. 4
Showjalljyourjworking.
TOTAL
Information
Thejmarksjforjquestionsjarejshownjinjbrackets.
Thejmaximumjmarkjforjthisjpaperjisj35.
Youjarejexpectedjtojusejajscientificjcalculatorjwherejappropriate.
AjDatajandjFormulaejBookletjisjprovidedjasjajloosejinsert.
*jun1 740 3 C01* j j
IB/M/Jun18/E11 7408/3BC
, Dojnotjwritej
2 outsidejthej
box
SectionjB
Answerjalljquestionsjinjthisjsection.
0 1 . 1 Statejthejlawjofjconservationjofjangularjmomentum.
[1jmark]
*02*
IB/M/Jun18/7408/3BC
, Dojnotjwritej
3 outsidejthej
box
0 1 .j 2 Figurej1jshowsjanjorbitingjsatellitejfittedjwithjtwojsmalljinstrumentjpodsjattachedjtojthejend
sjofjtelescopicjarms.jThejarmsjcanjbejextendedjorjretractedjbyjajmotorjinjthejbodyjofjthejsate
llite.
Figurej1
Withjthejtelescopicjarmsjfullyjextended,jthejcentrejofjmassjofjeachjinstrumentjpodjisjatjajra
diusjofj4.1jmjfromjthejaxisjofjrotation.
momentjofjinertiajofjsatellitejbodyjaboutjaxisj=j71jkgjm2
massjofjeachjinstrumentjpodj=j5.0jkg
Thejmassjofjthejtelescopicjarmsjisjnegligible.
Showjthatjthejtotaljmomentjofjinertiajofjthejsatellitejwithjthejarmsjfullyjextendedjis
240jkgjm2
[2jmarks]
Questionj1jcontinuesjonjthejnextjpage
Turnjoverj►
*03*
IB/M/Jun18/7408/3BC
Pleasejwritejclearlyjinjblockjcapitals.
Centrejnumber Candidatejnumber
j
Surname
j
Forename(s)
Candidatejsignat ure j
A-level
PHYSICS
Paper 3 j
Section B j Engineering physics
j
Thursday 14 June 2018
j j j Morning Time allowed: The total time forboth s
j j j j j j j
ections of this paper is
j j j j
Materials
Forjthisjpaperjyoujmustjhave: 2 hours. You are advised tosp
j j j j j j
ajpenciljandjajruler end approximately
j
ajscientificjcalculator
ajDatajandjFormulaejBooklet.
50minutesonthissection.
j j j j
Instructions
ForjExaminer’sjUse
Usejblackjinkjorjblackjball-pointjpen.
Filljinjthejboxesjatjthejtopjofjthisjpage. Question Mark
Answerjalljquestions. 1
Youjmustjanswerjthejquestionsjinjthejspacesjprovided.jDojnotjwritejoutsi
2
dejthejboxjaroundjeachjpagejorjonjblankjpages.
Dojalljroughjworkjinjthisjbook.j Crossjthroughjanyjworkjyoujdojnotjwant 3
tojbejmarked. 4
Showjalljyourjworking.
TOTAL
Information
Thejmarksjforjquestionsjarejshownjinjbrackets.
Thejmaximumjmarkjforjthisjpaperjisj35.
Youjarejexpectedjtojusejajscientificjcalculatorjwherejappropriate.
AjDatajandjFormulaejBookletjisjprovidedjasjajloosejinsert.
*jun1 740 3 C01* j j
IB/M/Jun18/E11 7408/3BC
, Dojnotjwritej
2 outsidejthej
box
SectionjB
Answerjalljquestionsjinjthisjsection.
0 1 . 1 Statejthejlawjofjconservationjofjangularjmomentum.
[1jmark]
*02*
IB/M/Jun18/7408/3BC
, Dojnotjwritej
3 outsidejthej
box
0 1 .j 2 Figurej1jshowsjanjorbitingjsatellitejfittedjwithjtwojsmalljinstrumentjpodsjattachedjtojthejend
sjofjtelescopicjarms.jThejarmsjcanjbejextendedjorjretractedjbyjajmotorjinjthejbodyjofjthejsate
llite.
Figurej1
Withjthejtelescopicjarmsjfullyjextended,jthejcentrejofjmassjofjeachjinstrumentjpodjisjatjajra
diusjofj4.1jmjfromjthejaxisjofjrotation.
momentjofjinertiajofjsatellitejbodyjaboutjaxisj=j71jkgjm2
massjofjeachjinstrumentjpodj=j5.0jkg
Thejmassjofjthejtelescopicjarmsjisjnegligible.
Showjthatjthejtotaljmomentjofjinertiajofjthejsatellitejwithjthejarmsjfullyjextendedjis
240jkgjm2
[2jmarks]
Questionj1jcontinuesjonjthejnextjpage
Turnjoverj►
*03*
IB/M/Jun18/7408/3BC