02138020/Cr8rytB 2017
CARIBBEAN
EXAUTNATTONS
COT'NCrL
CARIBBEAI.I N)VANCED PROFICIENCY EXAI,IINATIONS.
PHTSICS
T'NIT1-PAPER02
I,IARK SCHEI,IE
HAY/.,I,NE 2017
-2-
o28eo2o/cuEls 20L7
PEYSICS
T'NTT1-PAPER02
}IARK SCITEME
Question I
a
.,
s.o [3.2, 3.3, 3.5, 3.12t
6a
III!I
IIIII
tlflrtlmtalrtlalar
rratl
lrtrr tatat rltat tttta larra
lrrrt rtlrl trlta lltla rrrlltrlrt
Itatr tllll
lrltt taltl llrlr rrlll
I'IIT
lltrr llttl llaar tartr rlarl aarlt
!tall
II"I
tllrl lla!r ttlaa rlart artrr
ltrtt trtll
rlrl I ltltr
trlll ltlrl tlatl trlrl
lltll
lrLl rrlll rlrrr rrttl
ratll ItIta ttrrl
ltlll
rrlrr
trtaa rrlrl
.\atll
trrtt
lrllt rrttl
llllr rrrll
rlllr lrlal
lall! tratt
I tala llltl
lrtlt
IIIII
IIIII
IIIII
IIIII
ITIII
l\ tll
IITII
rlarr
rlaal
Illar
trral tarll 'IITI
lltll
at,rrl
IIITI
lattt Itttt trltt
rrl
tt
tltrr rttat tEtt
rarta
rIIIT rtl\ r! rltra ttlra rutt trrlr trrtl rrltl
tttt!
ttral tfaaa ttlr! llrlr laala
raarr rTTII llra. rlrrl
rrtrr rtrrl IIT'I
IIIII
rI!II
ltlrl rIITI Ittrr rl[t
fttll rttlt tlttl
ltrtt rtrlr r'ItIl tltrr rltll
lttlr
.IIII
l \rIl llrlr rtlat llalr ,!III IIIII
ITIIT
rlart tt!!l
tL tar lrrar tllla lrllr
III'I
lrtrr
IIIII
lEIl
rrrlr lrrrl
lr'-.rl
lllll
rrrl!
IIIII
TTIII
IIIII
tlllr
rftra
rr\. irr rttrl ttttt rrttr lrttt
ETIIITIII
IIIII
II'II
EIT'
talat lttrl
ltrt
aarat
trtlt
tarlt
trtll
arlar
IITII
ITI'I
Ittlr rtlaa
Yl
lhE:
IIIIT ItrI.'rltrt
rflal ttrtl rtrlr rtttr
ltttr
ltrtr rtlat
lltat rllll
raral rlalr
rrlal IIITI !!III
ITIII lttla ttftlftalltllrt
ltltl
taltl|
tarat
aara
trrra IITII trlrr \ trtl ltart rllta rrarl tilta
trlll ralll taatt
lxgr lrrtl
ara
Oa
tattr tlart rlart rrttr
IIIII
III'I
allrt r.rlrt
IIIII
TIIII
lrtlt rraal ITI'I
a
ara
O
rrrlr
rarll
rllll
ratll rtlla
rttlr
Itaaa
Ittlt
rltll rtrtl ltttt
tllrr rarrl
I O Ora
lratt tr\ rt ttall tLat llrll rttlr
tfatr
ltrlt
lfllrlllal
falat farrr
aaA.l
atrtl lttlt ttalr
tlttl
IIIII lrttr tta.tl
lttrt
llatt rttrt
artal ttaal
ltral trttt rttl: atllta ltrrl lrlrr rltlr
Irltt lrllt IIITI
trttl ltrrr
rrlrl llrar
2ltalrrarl
trttr tLtll,ra\
!Iaar rntl fttrl trtlrr[ll rlrat taltr
ttEanrII
\rtlltrttt
rtrrr
rtril
ralta
tlatttltrr
lalrt
lllal ttttr lalrl lailt ttttr
lrlt!
ttttt
II'II ltttt rlllt lrtrl tlltt rrlll
lttr! llrtr trarr llrlt rllrr !rrt! ttlrl rrltt lhE!
rrlll
lI'ttl latla tllll
rarat
:llrl llrtrr ltltt
tartrrrltt
!rllr
tttaltalrl
rrtar aartt tltlt
attlt lrrrl aa \lr larrl rrrl! rllrt
lr!ar aaaat Errt lratt latar Ittlt tltt r .TII' ITIII IIIIT
Ittlr tull aar rt altrl !tlrlrrul
arltt
tt!ar IIIII
III!'
trttr Illlr lalrl IIIII
tallaErtt
llfl!
artla
tltrr
rrIll
rfltt
ltllL
!al\'l
rtttt
ltlrr
trtt! latlt ltllt tttla lllll
rrrllrlltl
rrarl llrl \ latll tltla lraar
IIIII lllll
!I!II
lr atrlr lraalllrrl
tlttr tlrtl tatar atr
rtllr lltlt
ltltr !!tlI lrrtl llrt\ talal
rttal ratlarlrrl lrttr
rrtat tttrr lrrtt
tttrt
-.farr
rlrtl rrtrr
IITII rtltr tttl! aatlr
trttt llrll taart latrt lltrl tttal ttltl trrlr
IIII'
TI'TT
trrar rftat rtarr !!laa fl\ atrl
rr!al !Mr
ttttt lrtrl lttta raalr rllal trltr
tlt r!!ra l!aal
lrrla lrtrl
traMllll
artat ffG! IITII trtra
ttatr rtrta aratltaaaarllrt
lraal rlttt latlr !r,\rr rltll ltltl
rartr
lttlr rrrll tltr! trrat
rtttl rltaa attla
lltlt
rrtlt
llltr
ltltlatrtl
lrlrr ltata
rT.II rlrrr
II'II
rltlttllll
TIIIi IIITI ltrtl ltrll rtlat
lral I ltltr
lllr! ttlll
ITITI tarra rrlrl ,tltr
tllr! llrr! lrrrl ltrrt lrlal tltr! r!all rtatt
trall lrrt.' lttlt
!lllt
IIIIT lrnl:nrl
IIIII
IIIII
rtrta lrrll lrru rltal
TIII'
rIITT
III'I
rrlrl
tttat
tarrl
IIITI
tlall
llrrl
rtrrr
lrtat
rllTI
llfrr
laall
tlarl
lrtlt tttta lllal llrtr
, Jaatlalal
lalrr
rtlrt
IIrII
llall
alall
trtrt
rlatr
rtrrr
lrrlt tt!aI lallt rlltlltatt
ltdr
s2rIllllll
-:::-:---ITTIT ITITI lrall tatla rrlta lralrllrrr
-il..
----rIrI- rrrrr rlrrl rlrtr lnll ttrtl lttlr
rllalE--IITI'
-rrll
-r-r.
rrtta
tlrrt
rttar
rrlta lrrlt !flrl !]tar lttat taar!
.rttl ,lrlr
tlrlr rrrrl Irrtl ltlrr
rrarl tlttt
rltl! lrtlr rarrl tlall lrlll rrlrt
aatll rlalt
\taat arata alat! traat attal Itttt
lhE!
IIII' trtal rt[t lrltl ltrla llLt tltlr
llral rttt! atatr trrlt tttrt lrtlt lttll
!altl
I\'tll
talaa laall
ttlat
talra ttttt rLal
Itrtr
trlrr
la rtl alall alltalatta
IIIII IIIII ITIII ITTII TIIIT
rltrt I!iIr lrlal
rltrl llttr
a!!al lrtrr IITTI rrttt IIIII
ttltr
ltrlt
,!ttr
IUI'
III'I
ttral ltrrt
IITII IITI'
IITII
TIIII
lrllr
lalal rarlt rafrl ITIII IIIII
Ilar r Ia.It
lltlt lltar
ltrlt
tlllt
lt-lrl rllar ratrl lrtrl rrltl
lrrtl
rarlr
rtrttttlMlatl
tartl
TII'.I IIIII
tlltr ltfal ttltt taltr rtlll llltr
talat lartl rrttl IITII :TE! ITIIT
tlall
taat! rrral lrttt
ltttr ttrrl rttaa lalrl rflri rttll
Irttt
lraat rtlrl rtall raral IIIII
lallr
\'lall lttrl
rrtrl
rrilt rtfrl titla rttlr
rtrtl
fltll rlrrl lrrrr rlrt! IIIII
lttll
I :a!!l rlllt
raltt
tltat ltrrr ntta aErr Iarrl rrlrl
llrrr
l\ '/lI rralt tlral ralar IIITI
IIIII
IIIrI
IIIIT TIIII III'I ITIII ttltl rrtt!
rrlrr larrl taaal lrall rlllr ITIII :hE: IIIIT
Ilara IIr'll
tfttt
lttrl
lllraa
rltfl
lrlti
ttrtl
rllrt
rtllt ttalt lalll rrrrt tratt
ltt.\t
lllll
lttta
lllll
lllrr ltltl
lItIr lttlt lrtrt
rratt lrtll trllr talal lrttt trart !rrrl IIIII
rlttt
tlrlr
lrlt! rtrrr rrlrr lrrll latra ,tttt
trtlt
fIrr\
trltr ttltl lrtrl ttatt ttrrr talrt II!II IIITI
trltr lrlrI rulr rralr utrt ttrll
\IIlt
IN!T
IIIII
arttr ttrtr
IItIt
!attl
IITII
llala rtIlI
trltl Ettr llltt ttrll tllaa
lrlll tttlt !rtrr trltt IITIT ttlrr ltila
!rtl,
ttrll
I ttlr rltlr
trltt
llrar lattl
IIITI ltlar ttlta Lll!
ttlrr Itrlt
arrtl
ar lrl lalrl lrlal ltttr
tartt
rIIII III'I
rllrllrl
lllll
IIITI ttltl
rlttl rllrl tlrlr
I'III
tl.ttt trtlt
IIIII
trrtl
trlla
rnrr
rartl
lratl
lrlll
Itttl
lftll
alLr
IIITI
IITIT
lartr
larrr
ITTII
III!I
fIL
IIfI!
lltta aaraa rfarr lrarr rITTI
IIITT
IIIIr
I'III
lf!. =f llllI
II!II
rrrlt ttrar laara artrt tartr
rrtlt trltl
lrttr
'TIII
trttl rtlat lttt ':! rtra! tratr
!tlII
lllll
rllrl
lllra
ttttl
IIITT
llrar
III'I
IIIT' !T!'I rrlrr rrrll lttll
rltll TIIII
rfLa llltr
llltt
tlllr
IIrlI
IITIT tttal tlltr
rrlrl r'aala
ftllr
tltll
frlal
ITIII
IT'II
TlIII
IIIII
TIIII
IIIII
laarr EIII
lrrrr lrall tatttl \!lrtrttr
rrttt rlrtl
lgrl
EEr
rlrtl
ITTII
II]II
rtltt
tttlt
ItIrr tlfla rtrrr !l rrr nrrt
ltltr
ttttl
,arll rafll
attlr
tlftl
IttlI
tfatlltatr
ltral trltt llarl lr\'la allll
IIIII
TIIII
ltrrt
lrtaa
ltalr
aatal
!llft
lrlar
ITIIT
ITIII IIII' trart ttt.rlattlr
,FIrrrr.r ltrrr
rlttl rErt rarrl rtrrl t.Ial
tartl
! llll!
ttttt trtrr lrrl
Itrt!
lrllr
trrlt rrrrr rtlrt ltrrr ,I!II
lrtrt
llll\
lllll
ltlrl llrlr IIIIi
-i-rrtrll
!lllr
ttlla aarat rftlr ltrra IITIT II'II
rrrrr ILrnrrr
lllll
Ittla
fTI'T TITI' laara talll
I'III
rlllt rlilrrtrrr
trlrl rttrt lttrt ltatr trttl
ralaa larll attta tatal llaar lattt ratll Itttt
ttltr
trarr
rfllrtrrrr
tltrt
raral
laatl
ttttt
ttatt
h'rtr
lltrlrlrtl
tlttt attll lrrtt
ratrr rrarr TI'II
lalar
trftl
rllrl ITITI
tttat
ltrrt
laarl
ltttt
rtalr
tlllr
aarrl ll.\ll
tttrl
rrrrr rltra larrt tttrr TIITI ITIII
Erll
rIIIT TIIII rtarr IITII IIIII
Elrrltrrl
llrlr
llrll
[lr!
rlart
IIIII
IITII
IIIIr rlllMllt
IIIII
rlall
lf IIl
IIIIT
III\
I II!TT
I[TT
lrlll
TIfII
ltttr ltttl atlrt ,ltar llllt
ttaat rrlll III'I
lltra ratal lrtll rtraa rlla I llllt
IIIII
tltar ltraa ltaat alrtt I'TII
larrt TI'II
raarr rattt aaatr lrrrrraaar !!rltlalrr
tlrtlrr
rtlll
lt!!l ttttt
ttrtr
tlrtl
ltttt ttttttaltl
\'ltll ltlal
trtrl
IIIIT
IIIII
rtllr
ITIII
TITII
rlrtl attll
lllll
ttlta attlr
rtrlt lttll nrrl rlrll I '.:ll
--rr.ilr
TIIII
:TIII
lrrtr IT!IT
ILrrrrrr
IIT!I
rlrll
IIIIr
[ '.Il llIlI
lalll
IITII
tIIII
rlllr
aflrltrr!
tattr 'I'T!
rtttr arrlI rtrll rttlt tlltl
ll\'la
lllll
lrall
allrl
aallMlIl
tttar lllll
rtfrrrrrtr
rtttl
rrrll
tiltr talll ttttl tl:at tlltl
lla ll tllll
ttrla
lrllr
tI.TI lltra tlttt
talll
laatt
rrttr
larla
aaaal
ttaar
larra ararl laral
trttt
lrlrl
Itlta tlrat rtart
aralt lttlt
rrtll
ITIII
rttrt rtrlr lrtrr rtrrr llltl
llatl
IIITI
IrlIr
Iltll
ttll\
IllIl
altlr IIItI lllll
lllll
rtttr
lratl
rrrtt
aaat
rllrl
rtrrt
ltll!
ttraa ltttl
rlrlr
rtrtr
llll
lStla rlrtr talll ,tall
lfrla
lllll
I t.rtl tltal
allla rralr rarll
Ittt
raaar tatlr lllla tltrr
llrrl
lltlt
lllta
laalt r\'lll
trtar tlatl
tttr
lftal lalrt
lrall lrlll
rl.\ra lrarl
lraar lllrl
atrtr taatr trlla
ttttr rlalr ltrrt arral ltrl
rlt ll llarr
rtrll
lltlr
rrrt!
rtlar llrll
trtrt
rrrtt tatrl a[tr rarrl
allll
IIIII
lllr It IIIII
aIIa! ta!!l
llrat
trttl
rrltr ttttr tlttMtat
rlra
lrrrl
rrlt!
lrlll
rltll
rrtal tlrrr
IIIII
rlrrr llarl
lrtllrllll
rrlll
!lrll
rrrrl
rttll
rtttl
lllrarltl!
ttlal
laaat
trtlt
rlarr
tllll
lalll
lr!al
Ilalr
lrlrlr'tIIl
IlIal
lllll
ltlt
uarl
rrrtr
ttrll
ltatt
lltlr
rllal
l.\arl
Itrtr
rltlr
lalrl
rrllt
lltll
IITIT
rrllt
tflrtrrtrl
trlrr !:r:r
rrrrr
rrltl
lrllr
rL !rl anltlrlrl
rtlra rrtrt
,rrtr
ttlrr
tlltt tartl laatl traal
Itlll
l ltlll
ltr'al lllrttrarr
trrlt
rllla
tliII
lrll
f altMlll
ttttt
talll ltllr
rlrlt
!lr.\a rltrt lrlal trltlltrtt
tl!!l rltrl lta!a tatta taatt llrll
rrttt
rtttt
rttrt
tarrl
t
rrrtrrtrat
trtrl
lalll
llll
rrrrr
frall
llrtr
ttlta
rrrrl
lllrt
llarl
rtttt
trlIIItIIt
tllll
rlr!
,raarr
trrrt
lllll
lrlrt
rltll
IIIII
trllt
rra:l lrlrl
rllla
rllrr
raatr !alrl ,atat:!rrr
rllrr tarrl llalt
ttral trtrr
tltlt talla
llllr ltllr
rrrr!
lalrr ltttl llraa ltlra ltrrt
rlrta trltl tlrt!
llrll lllll
tlttr trrrl
IITTT ITIIT It!at ltlrr rrrrr rt!at rtrrr
!!aaMttr
ttral Ettt Eaal ttart !lllr
artrr rlrtl lrtat Iarrl lllta lttla ttrtl
ltart tllla ralll
ltlat tlral rtrltrrlla
ratta rlrta talll ttlrr
rttaa
attrl
IIIII
!rrtl rltla arrrr
ar!!r rrllt llllt IIII!
IITII
llrtt trrrt IITII
tr!at rn!a trtrt
!aar! lrrtl
trlll lrala rratr trttt lrltr
rrtaa altlt rlllr rIIII I'III
rlttrLtra
arll! .TIIT ITITI
atrtl llrla
arrrr
tatll
IITII
IITIT
tralr rlrla lrarl I]T'T T'I!T
IIIII
IIITI
tatrl lralr
tllll
ltatt
trttr ttrl!
latrl
Itlat
taarl lrrtr
rrrtr
ttrrl
IT!II !III!
IIIII
I.lIII
llni
rrart
rrtal
tatlt
n
tartr
lll \ I
!IfII
III\'r
tmlr
trIr!
IIIII
ttttt
ill!l
ilG!
-:
!ll!!
=:
#:
=!
llE!
-:
!E!
tt:
IE:
llts!
#:
=:
o
!t
o
tt
0
G'
9q9
rlOcl
ll
(r-r rlr lttoolr^
C'
o
o
G'
arl
!t
a
a
I
-3-
02138020/CrPrlB 20L7
PEYSICS
I,IIITl.PAPER02
I.IARK SCHEME
Orestion 1 (continued)
rc gr
(a)
Graph:
Labelled Axes correct orientationGood Scale (i.e. no multiples of
etc.) more than 50t of grid area -
correctly Plotted Points - . (2) r3
(-1 for orctr tacorarct plotl
Three straight Lines -
(b)
(c)
(d)
(1, I3
(u r8
13
1
3 or odd nuubers
I
(1) rs
2
[5 urfr,
(1) Uf
Block accelerates dorn the plane.
Block collides uith uall and rebounds. (U l[[
(U ttrt
Block decelerates up the plane.
(tC or zturr dva fa {rcr;J.lttlo - rc nrtr)
[3 rrlr,
I
ISI
I
1
I
tllt
(i) Acceleration = Gradient of initial slope (first
(1, l[
segroent of graph) (SOI)
(U u
= S=3.4ms-2
Ll{r15
(ii1 tength of incline - Area under the graph (U G
(Ullf
=0.5xL.20x4
- 2.1O m Correct ansuer (U fll
G
I€ngth of incline - Eguation of notion
lilust use acceleration as
calculated in Part c(i)
e.c.t. tril
ansuer from calculation
Correct
,
catcutatton above
(F.
A.)
S.
.
._)
veloclt.les are dlfferent (in both rnagmLtude and
(l E,
Block loses energy during collision (1 rc,
direction) (sol)
lotrl' 15 hr}t
1
I
1
1
1
I
1
2
8
5
-{-
o2138020/CUAnG 2017
PETSTCS
T'NTTl-PAPER02
I,IARK SCHEME
Ouestion 2
g.o [2.15, 2.16, 2.181
rc t[[ I8
(a)
tct5
allc
Laaa Lilatar
(acctc,
r.}--
-c====----=--
O.
D
(1 rrrk for rreagnat of -rl pior of qrpntnr) lld
(1 rart for nlrtlrr dtrtru D f.sgt er cqlrd
to
rt,t t)
a
t{ith the apparatus setup as shoun above, ensure that
the laser bean passes un-deviated through the narror
xazor slit to strike the screen (U.
a
A spreading pattern of bright and dark fringes wiII
be observed on the screen (1) which indlcates that
the light waves bend around the edges of the slit (1)
and hence disproves the partlculate aature of light
(or supports the uave nature of light). (1,
16
rrrtr, El
6
-5-
o2L38020lcI,E!/S 20L7
PEYSICS
T'NTT1-PAPER02
I,IARX SCEEI|E
Orestion 2 (continqgQ
rc
(b)
ott
P
(1)
I
8@ro
I
D
3ctu
[1 D* rcl
[1 srl
From diagram: tan g = ylD and sin 0 = A/a
tltren D >> a
1
lrfl
1
For sruall O; sin 0 - tan e (U
I
ThereforeY=AD/a (11
1
[2 rrrLr, El
(c) (i)
y-
3.6
4
[1 nrl,
= 0.9 mt - 0.9 x 10-qm
^va
-'.4--
tEl
0.9x10-3x0.55x10-3
0.8
d
IBI - robotihtton
[1 urt, Bl - .Drrr8
fringes: l.e. 3 tEw
f - 3.6 m /3 - 1.2 m or 1.2 r10-r u.
.... I = yalD - 8.1 rl0-? r
to the 4e dlaL tringe [a - 0 to 41: f .". * qr.N
I = valD - ?.0 rtO-? r
1
1
[1 rst,
- 6.3 x !Q-? I
1
x8
-6-
02138020/CrDrlS 20L7
PEYSICS
T'NTT1-PAPER02
I,iARK SCHEME
Question 2 (continued)
(c) (ii)
1 rrrl.qurl
1 rert dor
tat E ttl,
of poetr
[2 rerlr, Ilf,l
rc tf, I8
2
lotd 15 rertr
3
6
6
02138020/CrDt/:E 201?
PETSICS
UNTTl-PAPER02
I,IARK SCHEME
Question 3
8.O [5.t, 5.5, 5.6t
rc
(a)
69.= I + tl
OR AO
- AU + An (in this case An Ls work
done br)
(1 rc)
1
(1 rc)
I
(AU = changeiniruoalcoetp
I Q = t catruppllcdtosystem
I W=worhdoneonslrstm
lll
3 cor:*t
12
rrstr, El
T'f,
18
-8-
02138020/Cu!lB 20Lt
PEYSICS
T'NIT1-PAPER02
T,IARK SCHEME
Ouestion 3 (continued)
(b) (i)
a.
at
o
o
lllll
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o2138020/CrElB 20L7
PEYSICS
UNTTl-PT.PER02
I,TARK SCHEHE
Orestion 3 (continued)
rc
(b)
(i)
Labelled tures (1 fS1
Good Scale (no ruultiples of 3 etc. >50t of grid)
(1 rc)
(1
Points !l8, lll 6 Potat conrct
Best smooth cunre (1 18)
[l rrlc,
(ii) ' Irork done -
675 t
(iii)
30 i,
50 J
(2 lfr)
(1 tll oofYl
[3 rrrtr,
1
I
1
I8l
1
2
Gl
W - nRT
n--
18
1
[ff."]ff:'::T] .tlrTn"' suitabre 'nethod
= 6?5 t
T'f,
1
Ptt
RT
(1 Ur,
= 0.16 moles (1 u0 (can use any point
from table or graPh)
#
1
[Using {.00 x 10s Pa and 0.001 n3 from Table 2l
[2 rrrtr,
(iv)
OBI
AU=e+If
1
Since expansion is isothermal, (1 rcl
T : constant =) AU - 0
1
i. No change in internal energy (1 Uf)
[2rrrLl, 1rc+tUtrl
(v)
au-o+w
0 -AU-n
1
(1 url
-Q-(-675J)
- +675 J (1 t[r)
[2 rertr,.tnrl
f .E....If b(tl) or (tv) taorarct th.a .cf
lotel 15 trrlr
I
3
8
I
-10-
o2t3ao2olcLP!,ls 20t7
PHYSICS
I'NTT1-PAPER02
I,IARK SCHEI.IE
Ouestion I
g.o. 11.3, 2.L, 2.2, 3.5, 5.U
rc
(a)
(it The SI base unit of vo1rrc is
u I9
m3. (11
[1 Dst, El
1
(ii)
v
t
tPrr
*1
Rearrange to make C the subJect of the formula:-
C=
rPr|t
w7
1
(1 ur)
Substitution for nnits of eacb quantity:Unit of C =
.rg n-r-2
I
s ms
T
1
(1 u$
- kg m-1 s-1
(1 ur)
(drra.loo.l raellnir eccqrt$lo)
(rarrrr PSA b. iD brr uatt l
(b)
[3 nstr,
(i) tfork done by a force is the force x @
. (1'
Unit: Nm or J or kgm23-2 (1)
(il)
1
I
[2 usts, El
Corq)onent of reight ' 840 x 9.8 x sin(7.0)
(1 I8l - Go88.Gt trig
= 1003.2 N I 1003 N
(1 E, -
I[Il
1
1
lurcttoa
robott'totto t t^otr.a
1
[2 rrrtr,
Gl
-11-
o2l,3ao2olctDus 20L7
PEYSICS
IINITl-PAPER02
}RRT SCHEI,TE
Ouestion a (contlnued)
rc 0r
(c)
(i) Resultant force acting on car during deceleration (1 t[t,
({500n-1003)N=3rt97N
Fnet = ma :.
. = *=X=42ms-2
18
1
(1 E'
1
[2 rrrtr, ltrtl
(ii).rr2-u2+2as
(1 !C)
.0-202+21_4.21 s
s - 47.6 m (1 ltr3,
(iii)
1
J2 rrrls,
I
E,ttfl
F* = lrmo2
= 0.5 x 8rl0 x lQ2 - 1.7 x 103J Subatttutt6a t aaaf,at
(168000 J)
[1 lrt, IEI
(iv1 tfork done
I
1
: ffi; : f;:**
o -2.1 , 10s J SrtiEtto
t .Dtnr
rfgo)
(ao prorlQr for aot breflg rgntlrr
[1 ru*, url
(v) Ouantitles are not equal because the initial potential
energy of the car ras not taken inEo account.
[1 rrL, UlEl
totel 15 urte
1
a
11
0
a
-t2-
ozl3i,lo2olcrEI,lB 20L7
PEYSICS
UNTTl-PAPER02
I,IARK SCHEME
Ouestion 5
8.O. 12.5, 2.12, 3.2, 3.31
(al
(t) Ttrreshold of hearing refers to the intensity level
rhere a rmd 1l lurt rodtblo. (1 rc)
rhereas threshold of pain refers to the intensity
Ievel beyond at rhich rouad Dotag to pro&o
dteodort or erla. OR the maximrrm intensity that can
be heard sithout pain. (1 rc)
(ii)
a
a
[2 urtr,
The human ear responds to a ride range of
1
frequencies.' G rc)
The response of the hunan ear to sound intensity
is logarithmic. (1 rc,
r (dB) = to roe(il
1
To determine Intensity in tl m-z today
-> 115 = ,o rre(il(l tE,
=> 115
11.5=IgI-lgIo
11.5-lgI-Ig(10-12)
11.5-19I-(-12)
11.5 - 19 I + 12 (1 flll
11.5 -12 - Ig I
-0.5 - 19 I (1 Ur)
lO-0.5 - J
0.316 *D-2 = r (1 url
I
Et
(1 I[)
- 'o b.(il(l rB'
-) 11.r - b8G) (1 url
1
El
[2 trrt't,
(iii)
rc ur I8
I
-) 11.r - bsG) (1 ur)
.:.lgll.s = 3.16x 10u = (l)fr rrf
... f = (316 x t011xro) (1
1
1
1
1
url
- 3.16x 1011 xl x 10-u
i
= 3.16 x l0-tWm-2(1 1p0
1
I
[5 rrtr,
I[tl
a
-13-
o2l38U20lCrD!/B 20L7
PETSICS
UNITl-PA.PER02
I,TARK SCHEME
Ouestion 5 (continued)
rc
(b)
(i)
Ilaves going toward the uaII Lnterfere rlth waves
reflected frou the uall and nlni"n occur rhere there
is destructive interference bptreen incident and
reflected raves. (1 rc)
l{inina are not zero intensity because the reflected
waves have srnaller arylitudes than the incident ra\res.
. (1 rcl
[2 rrrtc,
(ii)
I8
I
I
El
1
{ loops betueen raII and speaker -> there are 4 |
between the wall and the speaker.
v-fh
TE
1
(1 E)
1
* i=0.2S. => l=15m
f =1, =#=zztnz
Otbor Eoastbl,o SolutLos:
(1 url
(1 rB'
[3 nrlr,
t[[l
-ti
4i internodal loops - 22 xiT -3m ...4_i
m
f = v/l
f=2558r
si -3m *r.-3,
f = v/It
Eor v
= 340 ms-l
f-283E:
lotel 15 rrrtr
6
9
0
o
-1tl-
o2l,38020lgtg!lB 20L7
PEYSICS
T'NIT1-PAPER02
I,IARK SCHEME
Ouestion 6
8.O [2.3, 2.1, 2.7, 2.11t
rc ur I8
(al
(i)
is the bret
The heat capacity of a body or 6lct
rnrlq, required to produce uaf.t tqtoretun rtro (lf,
or lt) in that body or obJect. (1 rc,
Unit: iI K_r or iI oC-r (1 rc)
[2 urtr,
El
(ii) Specific heat capacity is the b..t.m!9I7 reguired to
produce unlt tqlrnton
rtro (lf or lt) in tnLt rlr
(Ug) of a substance. (1 rcl
Unit: J kg.r 6-t 08 iI kg-r og-r
(iii)
(1 rcl
[2 lllIr,
Et
pbuo/rtrtr chry. rl,tbmt r tqrrt 5-1 cn'-gr (rt
oortrat tarntonD. (1 E)
(b)
(i)
[2 rr:tr,
1
I
El
Q=lVt=mcAO or Cl= nu60 or P = CIt = nDAO/t (or any
(1 Uf,
other equivalent eguation)
For flow of 5 g s-l -) 149=(0.00S)(+X5) + L... Eg'n I
(1 ur)
oR 140 = (SX+XS)
For flow of 10 g s-r => ZSO=(OO1)(OXS) + L... Eg'n 2
(1 ul)
oR ZSO = (r0Xc.)(5)
Snbtracting Eq'n I from Eq'n 2t- (1 ltrl,
=> 110 = 0.025cr oR 110 =25t4
110
:. tb= G
OR
1
1
Specific latent heat is tbe b.lt osgy requlred to
cause ualt rlrr (tlg) of a substance to undergo a
Unit: J kg-r (1 rc)
1
1
1
1
I
2
110
c-= E
= l.(fQ I lrg-r X-l on = {.{f g-r 1-r
(1 E-uol.tl
(1 f-Goaa.cturrrr)
[6 rr:kr, Ilttl
(ii)
The heat loss to the environnent remains constant (or
any other equivalent resPonse).
[1 r.tt, Irfl
1
a,
-15-
02138020/CrPtls 20L7
PEYSICli
T'NIT1-PAPER02
t,tARK SCHEI{E
Question 5 (continued)
rc ut I8
(iii)
a
a
o
The calculation does not involve the heat
capacities of the various Parts of the apParatus
and there ls no need to knor thelr values.
the inputs can be adJusted to nininlze heat loss
1
to the environnent.
Arry other equivalent resPonse.
Any one advantage
[1 rrrt,
El
(1v) Hg in glasa thernooeter or any other equlvalent (1,
1
(accePt resistance, themocouple, Iab thermometer)
[1 rert', fl
lot l 15 rrslr
7
I
0