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FizikKertas 1
MEI/JUN 2010
1 ¼ Jam
UNIT KURIKULUMPEJABAT PELAJARAN DAERAH HULU SELANGOR
PEPERIKSAAN PERTENGAHAN TAHUN TINGKATAN 4 2010
FIZIK
KERTAS 1
Satu jam lima belas minit
JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU
1. Kertas soalan ini mengandungi 50 soalan.2. Jawab semua soalan.3. Jawab dengan menghitamkan ruangan yang betul pada kertas jawapan.
4. Bagi setiap soalan hitamkan satu ruangan sahaja. 5. Sekiranya anda hendak menukarkan jawapan , padamkan tanda yang telah dibuat.
6. Kemudian hitamkan jawapan yang baru
7. Satu senarai rumus disediakan di halaman 2
8. Penggunaan kalkulator saintifik yang tidak boleh diprogramkan adalah dibenarkan
Kertas soalan ini mengandungi 22 halaman bercetak
NAMA : ««««««««««««««««««««««« «« KELAS : «««««««.
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The followi g i fo m io m y e ef l. The ym ol have hei al meaning .
Mak l ¤
¥ at ¦
§
̈ i kut ¥ ungk i n ¦
§
̈ f aedah. Si ¥ ¦
© l - i ¥ ¦
© l ¥ enpunyai ¥ akna yang ¦
i asa.
1. t
sv !
. a = t
uv
. v 2 = u2 + 2as
. s = ut +2
1at 2
5. t vus )(2
1!
6. Moment m = mv
. F =ma
.t
mumvF
!
9. W =mg
. g = 10 ms
-2
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Answer all q estions. Each q estion is followed y either three or fo r options.Choose the est option for each q estion then lacken the correct space on the answer sheet. J awab semua soal an.Ti ap ± ti ap soal an d ii kuti ol eh sama ada ti ga at au, empat pili han j awapan. Pili h sat u j awapan yang t erbai k bag i seti ap soal an dan hit amkan ruangan yang sepadan pada ker t as j awapan obj ek tif anda
1. B se q ntities e q ntities t t
K uantiti asas adal ah kuantiti yang A. e scalar only
skal ar sahaj a
B. se SI nits onlymenggunakan SI unit sahaj a
C. are in t e simplest f orm
dal am bent uk yang t er mudah
D. cannot e er ived f rom ot er q antities ti dak bol eh d it erbit kan dar i pada kuantiti l ai n
2. W ich is a der ived nit?
Y ang manakah yang merupakan unit t erbit an?
A. Joule B. Kelvin C. Kilogram D. Kilometre
3. The equator ial of ear th is 12 760 000 m. Which is wr itten with the correct prefix?Di amet er khat uli sti wa bumi adal ah ! " # $ $ $ $ m. Manakah yang ber i kut d it uli s dengan i mbuhan yang bet ul ? A. 1.276 Mm B. 0.01276 Gm C. 0.1276 Gm D. 12.76 µm
4. Which of the f ollowing values is equal to 5.0 µA?
Yang manakah antara nilai er ikut ersamaan dengan 5.0 µA? A. 5.0 x 10
-9 A
B. 5.0 x 10-6 AC. 5.0 x 10-3 AD. 5.0 x 106 A
5. Density of the mercur y is 13600 kgm
-3which is equivalent to
K et umpat an merkur i adal ah
%
# $ $ kg m -&
adal ah set ara dengan A. 0.136 gcm-3 B. 1.36x10
-2 gcm
-3
C. 1.36x10-3 gcm
-3
D. 13.6 gcm-3
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6. Which of the f ollowing unit is correct?
Manakah ant ara unit ber i kut bet ul ?
Quantity
Kuantiti SI unit
U nit SI
A.
Force Daya
kg ms-2
B.
DensityK et umpat an
kg m-2
C.
Area Luas
m3
D.
Acceleration P ecut an
ms-1
7. Which of the f ollowing quantities is the scalar quantity?
Ant ara kuantiti yang ber i kut, yang manakah kuantiti skal ar?
A. Work / K er j a
B. Force / Daya C. Weight / Berat D. Momentum / Moment um
8. A ove is a set of reading obtained in an exper iment to study resistance in a wire
conductor . Which of the f ollowing is true about the data?Di at as adal ah sat u set bacaan bag i sat u eksper i men unt uk mengkaji ker i nt angan dawai.Ant ara yang ber i kut, yang manakah yang benar t ent ang dat a it u?
Diagram 1
A. Wire diameter is measured using vernier calliper .
Di amet er dawai d i ukur menggunakan angkup v erni er .
B. Wire diameter is measured using micrometer screw gauge. Di amet er dawai d i ukur menggunakan t ol ok skru mi kromet er .
C. The smallest division of the ammeter is 0.02 A. S kal a t erkec il pada ammet er i al ah ' .
' ( A.
D. The smallest division of the voltmeter is 1 V.
S kal a t erkec il pada v olt met er i al ah ) V.
Wire diameter Diameter dawai
= 1.40mm
Electr ic currentArus
= 0.6 A
Potential diff erence Beza keupayaan
= 4.7 VConductor
Konduktor
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9. Which of the f ollowing is a vector quantity?Y ang manakah ant ara yang ber i kut i ni merupakan kuantiti v ek t or? A. Mass of the ball / J i si m sebiji bol a B. Age of the ear th / U si a bumi C. Number of students in a class / Bil angan pel aj ar d i dal am kel as D. Ear th¶s gravitational pull on our body / T ar i kan graviti ke at as badan k it a
10. Diagram 2 shows the reading of a vernier caliper .
R aj ah 0
menunj ukkan bacaan angkup v erni er .
Diagram 2
What is the reading?
Berapakah bacaan t ersebut ?
A. 0.80 cm
B. 0.82 cm
C. 0.85 cm
D. 1.00 cm
11. The diagram shows par t of the micrometer screw gauge bef ore 3(a) and 3(b) after taken
reading f or to determine the thickness of a iron plate.
R aj ah menunj ukkan sebahag i an st ruk t ur t ol ok skru mi kromet er sebel um 3(a) dan sel epas 3(b) mengambil bacaan unt uk menent ukan ket ebal an sekepi ng kepi ngan besi.
Diagram 3(a) Diagram 3(b)
The actual thickness of the iron plate is ... T ebal sebenar kepi ngan besi t ersebut adal ah ...
A. 9.02 mm B. 8.99 mm C. 8.96 mm D. 8.52 mm
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12. In a r ifle competition, Suresh was eliminated f rom the competition because his shots
were not accurate eventhough they were consistent. Which target board below shows
the shots made by Suresh?
Dal am sebuah per t and i ngan menembak , S uresh d i si ngk i rkan dar i pada per t and i ngan
kerana t embakannya ti dak jit u wal aupun i anya persi s. P apan sasaran yang manakah
menunj ukkan t embakan yang d il akukan ol eh S uresh?
A.
B.
C.
D.
13. Which of the f ollowing is a correct explaination of sensitivity of an instrument?
Y ang manakah ant ara yang ber i kut adal ah penj el asaan yang bet ul bag i kepekaan sasuat u al at ?
A. Sensitivity of an instrument is its ability to detect a small change in the quantity to be
measured. K epekaan suat u i nst rument adal ah kebol ehan unt uk mengenal pasti perubahan kec il pada kuantiti yang d i ukur .
B. Sensitivity of an instrument is its ability to measure a quantity with little or no deviation among measurements. K epekaan suat u i nst rument adal ah kebol ehan unt uk mengukur kuantiti dengan ti ada at au ti ada si si han ant ara ukuran-ukuran.
C. Sensitivity of an instrument is its ability to determine the diff erence between the measured value and actual value. K epekaan suat u i nst rument adal ah kebol ehan unt uk menent ukan perbezaan ant ara kuantiti d i ukur dengan nil ai sebenar .
D. Sensitivity of an instrument is its ability to be def ective when not handled with proper care. K epekaan suat u i nst rument adal ah kebol ehan unt uk ti dak ber f ungsi ji ka ti dak d i gunakan dengan bet ul.
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5 6 7 8 / 8 9 @ akciA
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. Error in reading measurement due to rong ositioning of the e e at P and R is kno n
as ... C alat semasa mengambil bacaan kerana salah kedudukan mata pada P danC dikenali
sebagai ...
iagram
A. Zero error / C alat sifar
B. Random error /C
alat rawak D . Paralla error /C alat paralaks
E . onsistenc error /C alat konsisten
. iagram sho s a com ression balance ith zero error
C ajah 5 menunjukkan pen imbang dengan ralat sifar.
iagram
hich of the follo ing statement is not true to correct the error
Yang manakah antara penyataan ini yang tidak tepat untuk membetulkan ralat tersebut?
A. Use different com ression balanceMenggunakan penimbang yang lain
B. educt zero error from the readings
Menolak ralat sifar dari bacaanF bacaan
. alibrate the zero error Membetulkan ralat sifar dari penimbang
. Take man readings of the same uantit and find the mean reading
Mengambil beberapa bacaan dan mendapatkan nilai purata bacaan
R Q P
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16. Which of the f ollowing graph obeys the equation F = kx, where k is a constant.
Y ang manakah ant ara graf ber i kut memat uhi persamaan F = kx , d i mana k adal ah
pemal ar .
A.
B.
C.
D.
17. State the relationship between f orce, F, and acceleration, a, shown in Diagram 6. N yat akan hubungan ant ara hal aj u dan masa, t dal am ajah 6.
Diagram 6
A. F directly propor tion to a / F berkadar l angsung dengan a B. F linear ly propor tion to a / F berkadar li near dengan a C. F inversely propor tion to a / berkadar sonsang dengan a
F/N
a/m s-2
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. hat is the relationshi bet een V and t for the gra h in iagram
Apakah hubungan antara V dan t bagi graf dalamRajah ?
iagram
A. V t
B. V t
. V 2t
. V -2t
9. iagram sho s the ath tra elled b a car .from P to S.
T ajah 8 menunjukkan lintasan sebuah kereta dari P ke S.
iagram
hat is the total distance of the car
Berapakah jumlah jarak kereta tersebut bergerak?
A. km
B. km. 9 km
t/s
V/m s-1
50
10
5 km
1kmS
3km
R
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W X Y U / U ̀ Hakcia
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2 . A student alked km due east, and then km due north. hich of the follo ingdiagram can be use to stud his dis lacementSeorang pelajar berjalan 3 km ke arah timur, danseterusnya 4 km ke arah utara. Antara
rajah berikut, yang manakah boleh digunakan untuk menentukan sesarannya?
A.
B.
.
.
2 . The gra h sho s ho the s eed of a car changes ith time. Graf menunjukkan bagaiman laju sebuah kereta berubah dengan mas
iagram 9
hich of the follo ing gi es the distance tra elled in the time inter al OR
Manakah antara yang berikut menghasilkan jarak yang dilalui dalam sela masa Oc ?
A. the area OPQR / luas OPQc
B. the length PQ / panjang PQd
. the length QR-PO) / panjang (Qc e
PO)f . the ratio QR/PO / nisbah Qc /PO
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22. Diagram 10 shows the pattern of oil dr ipping at a constant rate f rom a moving car .
R aj ah menunj ukkan coral mi nyak meniti k pada kadar seragam dar i sebuah keret a yang sedang bergerak .
Diagram 10
Which of the fillowing descr ibes the motion of the car ?Ant ara yang ber i kut, manakah yang menghurai kan gerakan keret a t ersebut ? A. Acceleration f ollowed by constant velocity
P ecut an d ii kuti dengan hal aj u seragam
B. Deceleration f ollowed by constant velocityN yahpecut an d ii kuti dengan hal aj u seragam
C. Constant velocity f ollowed by acceleration H al aj u seragam d ii kuti dengan pecut an
D. Constant velocity f ollowed by deceleration H al aj u seragam d ii kuti dengan nyahpe cut an
23. Which of the f ollowing is true about the movement of an object with zero acceleration?Ant ara yang ber i kut, yang manakah benar berkenaan pergerakan suat u obj ek dengan
pecut an sif ar?
A. The object is moving at minimum velocityg bj ek bergerak dengan hal aj u mi ni ma
B. The object is moving at maximum velocityg bj ek bergerak dengan hal aj u maksi mum
C. The object did not move g bj ek pegun
D. The object moves at constant velocityg bj ek bergerak dengan hal aj u mal ar
24. A car travels with a constant velocity of 12 m s
-1f or 10 s. What is the acceleration of the
car ?S ebuah keret a bergerak dengan hal aj u seragam h i m s - p sel ama h q s. Berapakah pecut an keret a t ersebut ?
A. 0 m s-2
B. 1.2 m s-2
C. 12.0 m s-2
D. 120.0 m s-2
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25. An object star ts f rom rest and move with unif orm acceleration. The object reaches a
speed of 16 m s-1 after 4s. How f ar would the object had travelled bef ore its speed
reaches 16 m s-1
? S at u obj ek ber mul a dar i pegun dan bergerak dengan pecut an mal ar . r bj ek t ersebut mencapai kel aj uan
s t m s -
u sel epas v s. Berapa j auhkah obj ek t el ah bergerak sebel um
kel aj uannya mencapai s t m s - u ?
A. 4 m B. 32 m C. 64 m D. 128 m
26. Diagram 11 shows f our motion graphs P, , and S.
R aj ah s s
menunj ukkan empat graf gerakan P, w , R dan S.
Diagram 11
Which of the graphs are f or motion with constant velocity? x raf yang manakah adal ah unt uk gerakan dengan hal aj u mal ar? A. P and / P dan R B. P and S / P dan S C. and / w dan R D. and S / w dan S
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27. Diagram 12 shows a velocity-time graph of a moving bicycle. R aj ah y
�
menunj ukkan graf hal aj u -masa bag i sebuah basi kal yang sedang bergerak .
Diagram 12
Which statement descr ibes the motion of the bicycle in the region WX and XY?P ernyat aan yang manakah menerangkan pergerakan basi kal t ersebut dal am bahag i an WX dan XY ?
WX XY
A. Increasing acceleration P ecut an ber t ambah
Decreasing acceleration P ecut an berkurang
B. Increasing acceleration P ecut an ber t ambah
Unif orm acceleration P ecut an seragam
C. Zero acceleration P ecut an sif ar
Unif orm acceleration P ecut an seragam
D. Unif orm acceleration P ecut an seragam
Zero acceleration P ecut an sif ar
28. The diagram 13 shows a velocity-time graph f or the motion of a bus.
R aj ah �
�
menunj ukkan graf hal aj u mel awan masa bag i sat u gerakan sebuah bas.
Diagram 13
What is the displacement of the bus after 20 seconds?Berapakah sesaran bas t ersebut sel epas �
�
saat ?
A. 135.0 m B. 129.0 m C. 128.5 m D. 127.5 m
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29. If we pull the cupboard in a quick jerk, the coin will drop into the glass. It happens because of the ....... J i ka kadboard d it ar i k dengan l aj u, sy illi ng akan j at uh ke dal am gel as. I ni t er j ad i kerana ...
Diagram 14
A. Momentum / Moment um B. Force / Daya C. Iner tia / I nersi a D. Pressure / T ekanan
� � . Diagram 15 shows an astronaut walking on the moon.
R aj ah �
�
menunj ukkan seorang angkasawan ber j al an d i per mukaan bul an.
Diagram 15
What can you say about his iner tia? Apakah yang dapat anda kat akan mengenai i ner ti anya. A. Increases / Meni ngkat B. Decreases / Menurun C. Unchanged / Ti dak berubah D. Zero /Sif ar
31. To br ing a super tanker to a stop its engine are typically cut off about 25km f rom por t.
Why is it so difficult to stop a super tanker . U nt uk menghenti kan sebuah kapal besar , enji nnya per l u d i henti kan k i ra -k i ra �
�
k m dar i pel abuhan. K enapakah sukar unt uk menghenti kan kapal besar t ersebut ?
A. Super tanker has heavy weightK apal besar mempunyai berat yang besar
B. The f orce f rom sea is big Daya dar i l aut yang besar
C. The iner tia of the super tanker is high I nersi a kapal besar it u ti ngg i
D. The momentum of the super tanker is high Moment um kapal besar it u adal ah ti ngg i
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32. Why is a petrol truck filled with petrol as in Diagram 16 (b) is better than the one in Diagram 16(a)? K enapakah t rak ber i si pet rol dal am R aj ah
� � � b) adal ah l ebi h bai k berband i ng t rak dal am
R aj ah � �
� a)?
Diagram 16(a) Diagram 16(b)
A. Mass of petrol is devided into smaller container and is easy to carr y. J i si m pet rol d i bahag i kepada bekas kec il supaya senang d i angkut .
B. Mass of petrol is devided into smaller containers and its iner tia is less. J i si m pet rol d i bahag i kan kepada bekas kec il supaya i ner ti a kurang .
C. Petrol truck with smaller containers can move f aster . T rak dengan bekas kec il bol eh bergerak l ebi h cepat.
D. If one container leak, only that container will be eff ected. J i ka sat u bekas bocor , hanya bekar t ersebut yang t er j ej as.
33. Momentum can be defined as ......
Moment um bol eh d it akr if kan sebagai .......
A. a product of mass and displacement / hasil darab ji si m dan sesaran B. a product of mass and velocity / hasil darab ji si m dan hal aj u C. a product of mass and acceleration / hasil darab ji si m dan pecut an
D. a product of mass and volume / hasil darab ji si m dan i si padu
34. Diagram 17 descr ibes the motion of two bodies bef ore and after collision.
R aj ah � �
menunj ukkan pergerakan dua j asad sebel um dan sel epas per l anggaran.
Bef ore collision After collision
Diagram 17What is the value of v ?Berapakah nil ai ? A. 1.3 m s-1
B. 2.6 m s-1
C. 4.0 m s-1
D. 5.0 m s-1
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35. The diagram shows two trolley of the same mass bef ore and after collision.
R aj ah menunj ukkan dua t roli sama ji si m sebel um dan sel epas per l anggaran.
Diagram 18
Which of the f ollowing statements is correct about momentum after collision?P enyat aan manakah yang benar t ent ang moment um sel epas per l anggaran?
Tr olley A Trol i A
Tr olleyTrol i B
A. Increases
Meni ngkat
Increases
Meni ngkat B. Increases
Meni ngkat Decreases Menurun
C. Decreases Menurun
Increases Meni ngkat
D. No change Ti ada perubahan
No change Ti ada perubahan
36. Diagram 19 shows the movement of a balloon when the air in its is being released.
R aj ah � 9 menunj ukkan pergerakan sebuah bel on apabil a udara d i kel uarkan.
Diagram 19
The movement of the balloon can be explained byP ergerakan bel on bol eh d it erangkan dengan A. the concept of inersia / konsep i ner ti a B. the concept of equilibr ium of f orces / konsep kesei mbangan daya / C. pr inciple of conser vation of energy / pr i nsi p keabad i an t enaga D. pr inciple of conser vation of momentum / pr i nsi p keabad i an moment um
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37. The diagram below shows firemen holding a hose spraying out water . R aj ah d i bawah menunj ukkan ahli bomba memegang hos yang sedang memancut kan ai r .
Diagram 20
Several firemen are needed to hold the hose Beberapa ahli bomba d i per l ukan bag i memegan g hos t ersebut
A. to suppor t the weight of the hose.
unt uk menyokong berat hos t ersebut B. to increase the mass of water coming out
unt uk menambahkan ji si m ai r yang kel uar C. to increase the speed of the water in the f oward direction.
unt uk menambahkan kel aj uan ai r memancut ke hadapan D. to reduce the large recoil eff ect
unt uk mengurangkan kesan anj akan ke bel akang yang besar 38. The diagram shows f orces P, , and S acting on an aeroplane flying at a constant
velocity and altitude. R aj ah menunj ukkan daya -daya P, � , R dan S yang ber ti ndak ke at as kapal t erbang
yang sedang t erbang dengan hal aj u dan altit ud mal ar .
Diagram 21Which of the f ollowing is correct about the magnitude of P, , and S?Y ang manakah bet ul t ent ang magnit ud P, � , R dan S ?
Hor i ontal Vertical
A. P = = S B. P > > S C. P < < S D. P > =S
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39. Diagram below shows the hor izontal f orces acting on the motorcycle when it is accelerating. R aj ah d i bawah menunj ukkan daya -daya mendat ar yang ber ti ndak ke at as mot osi kal yang sedang memecut.
Diagram 22
Which of the f ollowing statement is true?Ant ara yang ber i kut, yang manakah benar?
A. A resultant f orce is equal to zero Daya paduan sam a dengan sif ar
B. A resultant f orce is not equal to zero Daya paduan ti dak sama dengan sif ar
C. For ward thrust is equal to resistant f orces Daya t uj ah ke hadapan sama dengan daya r i nt angan
D. For ward thrust is less than resistant f orces Daya t uj ah ke hadapan l ebi h kec il dar i pada daya r i nt angan
40. Diagram 23 shows a car is accelerating with a f r ictional f orce of 6000N acting on it. R aj ah
� �
menunj ukkan sebuah keret a memecut dengan daya r i nt angan sebanyak � N ber ti ndak t erhadap keret a it u.
Diagram 23
What is the f orce exer ted by the engine of the car ?Berapakah daya yang d i kenakan ol eh enji n keret a it u? A. equal to 6000N / bersamaan dengan � N B. greater than 6000N / l ebi h besar dar i pada � N C. smaller than 6000N / l ebi h kec il dar i pada � N D. 0 N
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41. A softball player moves his hand backwards while catching a f ast moving ball. This
movement of the hand is to S eorang pemai n bol a li sut menggerakkan t angannya ke bel akang semasa menangkap bol a yang sedang l aj u bergerak . P ergerakan t ersebut d il akukan unt uk
Diagram 24
A. increase the impulsive f orce menambahkan daya i mpul s
B. increase the stopping time of the ball
menambahkan masa unt uk menghenti kan bol a
C. control the ball to stop it f alling mengawal bol a supaya i a berhenti
42. Diagram 25 shows polystyrene casing used in packing the computer .
R aj ah
menunj ukkan bekas poli st er i n d i gunakan dal am pembungkusan komput er .
Diagram 25
What is f unction of the polystyrene casing? Apakah f ungsi bekas poli st er i n?
A. To reduce the impulse if accidentally dropMengurangkan i mpul s ji ka komput er j at uh dengan ti ba -ti ba
B. To reduce the collision time if accidentally dropMengurangkan masa per l anggaran ji ka komput er j at uh dengan ti ba -ti ba
C. To reduce the impulsive f orce if accidentally dropMengurangkan daya i mpul s ji ka komput er j at uh dengan ti ba -ti ba
D. To reduce the change of momentum if accidentally dropMengurangkan kadar perubahan moment um ji ka komput er j at uh dengan ti ba -ti ba
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43. A car with a mass 1000kg moves at 20 m s -1. What braking f orce is needed to br ing the
car to a halt in 10s?S ebuah keret a dengan ji si m kg bergerak dengan kel aj uan
m s - . Berapakah daya membrek yang d i per l ukan unt uk menghenti kan keret a t ersebut dal am masa
s?
A. 200 NB. 2000 N
C. 20 000ND. 200 000N
44. A 800g ball resting on the ground is kicked so that it moves off with a velocity of 120m s-1
Calculate the impulsed supplied to the ball. S ebiji bol a ber ji si m j g pegun d i at as t anah d it endang menyebabkan i a bergerak dengan hal aj u,
m s - . Ki ra i mpul s yang d i kenankan ke at as bol a t ersebut.
A. 96 N s B. 150 N s C. 96 000 N s
D. 1500 N s 45. Which of the f ollowing is a beneficial of the impulsive f orce?
Ant ara yang ber i kut, yang manakah merupakan kebai kan daya i mpul s?
A. Air bag of a car Beg udara sebuah keret a
B. Polystyrene packing Bungkusan poli st eren
C. Thick and soft matress f or a high jumper Til am t ebal dan l embut unt uk pel ompat j auh
D.Pestle and mor tar Al u dan l esung
46. Which of the f ollowing saf ety f eatures in a vehicle is not designed to protect the dr iver
dur ing collisions?Ant ara c i r i kesel amat an kenderaan yang ber i kut, yang manakah ti dak ber t uj uan unt uk meli ndung i pemandu semasa per l anggaran?
A. einf orced passenger compar tment
R uang / sangkar penumpang yang t egar
B. Side bars in vehicle doors k al ang /Bar si si dal am pi nt u kenderaan
C. Shock absorbers P enyerap hent akan
D. Air bags Beg udara
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47. Diagram 26 shows Proton Exora¶s crumple zone. What happen if there is no crump le zone f or the cars?R aj ah
l
m menunj ukkan sebuah P rot on E xora dengan zon mudah remuk . Apa yang ber l aku sek i ranya zon mudah remuk ti dak ada bag i sesebuah keret a?
C rumpl e zone
Diagram 26
A. Time of impact will increase and increase the level of injur ies Masa per l anggaran meni ngkat dan meni ngkat kan t ahap kecederaan
B. Time of impact will increase and increase the impulsive f orce to the car Masa per l anggaran meni ngkat dan meni ngkat kan daya i mpul s t erhadap keret a
C. Time of impact will decrease and increase the impulsive f orce to the car Masa per l anggaran berkurang dan meni ngkat kan daya i mpul s t erhadap keret a
D. Time of impact will decrease and avoid the dr iver f rom injur ies Masa per l anggaran berkurang dan menghal ang pemandu dar i pada cedera
48. Diagram 27 shows a coin and a f eather is being released at the same time in a vacuum
cylinder . R aj ah
l
n menunj ukkan sekepi ng sy illi ng dan sehel ai bul u burung d ij at uhkan serent ak dal am sat u sili nder .
Coin f eather
vacuum
Diagram 27Which obser vation is correct?Ant ara pernyat aan ber i kut yang manakah benar?
A. Coin will reach at the base ear lier S y illi ng akan sampai ke dasar ti ub l ebi h awal
B. Feather will reach at the base ear lier Bul u burung akan sampai ke dasar ti ub l ebi h awal
C. Coin and f eather will reach at the base at the same time S y illi ng dan bul u burung sampai ke dasar ti ub serent ak
D. Coin and f eather float in the tube S y illi ng dan bul u burung dal am ti ub
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49. Diagram 28 shows a car on tow. R aj ah
o
menunj ukkan sebuah keret a sed ang d it unda.
Diagram 28
Which of the f ollowing vector diagram represents the resultant f orce, F, which is acts on the car ?Ant ara raj ah v ek t or ber i kut, yang manakah mewak ili daya paduan, F, yang ber ti ndak ke at as keret a t ersebut ?
A. B.
C.
D.
50. Diagram 29 shows a gir l of mass 40 kg standing inside a lift which is moving upwards.
R aj ah o
9 menunj ukkan seorang budak perempuan ber ji si m
kg berd i r i d i dal am sebuah lif yang sedang bergerak ke at as.
Diagram 29
If the reading of the weighing scale reads 448 N, what is the acceleration of the lift?J i ka peni mbang menunj ukkan bacaan
N, berapakah pecut an lif t ersebut ?
A. 0.8 ms
-2 B. 1.2 ms
-2
C. 11.2 ms-2
D. 21.2 ms-2
Balance