ULANGKAJI DENGAN SKEMA JAWAPAN PBD FIZIK TINGKATAN 4 2021

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Section A
Bahagian A
[20 marks]
[20 markah]
Answer all questions.
Jawab semua soalan.

1. Which of the following physical quantities does not matched the correct S.I. unit?
Antara kuantiti fizik berikut, yang manakah tidak dipadankan dengan unit S.I. yang betul?

Physical quantity Symbol of S.I. unit
Kuantiti fizik Simbol unit S.I.
cd
A Luminous intensity
Keamatan berluminositi mol

B Amount of substance C
Kuantiti bahan
second
C Temperature saat
Suhu

D Time
Masa

2. The physical quantity that cannot be defined in terms of other physical quantities is called
Kuantiti fizik yang tidak boleh ditakrifkan oleh mana – mana kuantiti fizik lain dipanggil
sebagai
A non – physical quantity
kuantiti bukan fizik
B dimensionless quantity
kuantiti tanpa dimensi
C derived quantity
kuantiti terbitan
D base quantity
kuantiti asas

3. “A trolley of mass 0.80 kg moves at a velocity of 15 ms-1 towards the North”
“Sebuah troli berjisim 0.80 kg bergerak dengan halaju 15 ms-1 ke arah Utara”

The statement above shows there are
Pernyataan di atas menunjukkan terdapat
A two base quantities

dua kuantiti asas
B two vector quantities

dua kuantiti vektor
C two scalar quantities

dua kuantiti skalar
D one vector quantity and one scalar quantity

satu kuantiti vektor dan satu kuantiti skalar

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4. The diagram below shows a graph of y against x.
Rajah di bawah menunjukkan satu graf y melawan x.

y

6

8 x
What is the gradient of the graph?
Berapakah kecerunan graf tersebut?
A - 0.75
B - 1.33
C 0.75
D 1.33

5. The diagram below shows a graph of velocity, v against time, t.
Rajah di bawah menunjukkan satu graf halaju, v melawan masa, t.

v/ms-1

t, s

Which of the following statements is not correct?
Antara pernyataan berikut, yang manakah adalah tidak betul?

A v is inversely proportional to t
v berkadar songsang dengan t

B v increase with t
v bertambah dengan t

C The gradient of the graph is decreasing
Kecerunan graf berkurang

D The unit for the gradient is in ms-2
Unit bagi kecerunan ialah ms-2

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6. Diagram shows the route taken by a patrol car to monitor the security of a neighbourhood.
The patrol car started moving from point P at 9.00 pm.
Rajah menunjukkan jalan yang diambil oleh sebuah kereta peronda untuk memantau
keselamatan satu kawasan kejiranan. Kereta peronda mula bergerak dari titik P pada jam
9.00 pm.

What is the displacement of the patrol car at 9.30 pm?
Berapakah sesaran kereta peronda pada jam 9.30 pm?

A 0.0 km
B 5.0 km
C 7.5 km
D 16.0 km

7. Which ticker tape describes a motion with increasing velocity?
Pita detik manakah menunjukkan pergerakan dengan halaju bertambah?

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8. The diagram below shows a part of a ticker tape to show the motion of a trolley.
[1 tick = 0.02 s]
Rajah di bawah menunjukkan satu bahagian pita detik untuk menunjukkan Gerakan sebuah
troli.
[1 detik = 0.02 s]

What is the acceleration of the trolley?
Berapakah pecutan troli itu?

A 6 ms-2
B 8 ms-2
C 10 ms-2
D 12 ms-2

9. The diagram below shows a velocity-time graph for the motion of a car.
Rajah di bawah menunjukkan satu graf halaju-masa bagi gerakan sebuah kereta.

What is the distance travelled by the car in 10 s?
Berapakah jarak yang dilalui oleh kereta itu dalam masa 10 s?

A 15 m
B 20 m
C 30 m
D 45 m

10. A feather and a coin are released together in Perspex tube which is vacuumed. Which physical
quantity will remain constant for both the feather and coin?
Sehelai buu pelepah dan duit syiling dibebaskan Bersama-sama dalam sebatang tiub
perspeks yang divakumkan. Kuantiti fizik yang manakah kekal malar bagi kedua – dua bulu
pelepah dan suit syiling?
A Momentum
Momentum
B Acceleration
Pecutan
C Kinetic energy
Tenaga kinetik
D Potential energy
Tenaga keupayaan

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11. A player throws a ball upwards with a velocity of 15 ms-1. What is the maximum height

reached?

Seorang pemain melemparkan bole ke atas dengan kelajuan 15 ms-1. Berapakah ketinggian

maksimum yang dicapai? Given /Diberi g = 9.81 ms-2

A 10.8 m
B 11.5 m
C 15.5 m
D 19.8 m

12. Which of the following has the greatest inertia?
Manakah antara berikut mempunyai inersia terbesar?

A Mass / Jisim: 5kg
B Mass / Jisim: 3000kg
C Mass / Jisim: 10 g
D Mass / Jisim: 1 kg

13. Which of the following situations can explained by principle of inertia?
Manakah antara situasi yang berikut boleh diterangkan dengan menggunakan konsep
inersia?
A A moving ball stop after travelled for 10 m.
Sebiji bola yang bergerak berhenti selepas melalui jarak sebanyak 10 m.
B The velocity of a car increase, when the car accelerate.
Halaju sebuah kereta meningkat apabila ia memecut.
C An apple falls from an apple tree with constant acceleration.
Sebiji buah epal jatuh dari sebatang pokok epal dengan pecutan malar.
D Passengers in a bus lurch backwards when the bus start to move forward from
stationary.
Penumpang di dalam sebuah bas menghala ke belakang apabila bas tersebut mula
bergerak ke hadapan dari keadaan pegun.

14. Diagram shows a man jumps onto a jetty from a boat
Rajah menunjukkan seorang lelaki melompat ke atas jeti daripada sebuah perahu.

Which direction A, B, C or D shows the motion of the boat?
Antara arah A, B, C dan D yang manakah menunjukkan gerakan perahu itu?

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15. Diagram shows a water rocket as it was launched.

Rajah menunjukkan sebuah roket air Ketika dilancarkan.

This situation can be explained by
Situasi ini boleh dijelaskan oleh
A concept of inertia

konsep inersia
B principle of conservation of energy

prinsip keabadian tenaga
C equilibrium of forces

keseimbangan daya
D principle of conservation of momentum

prinsip keabadian momentum

16. Diagram shows a boy landing with his knees bent in long jump category.
Rajah menunjukkan seorang budak lelaki mendarat dengan kakinya bengkok dalam
kategori lompat jauh.

Why did the boy bend his knees? [Lihat halaman sebelah
Kenapa budak membengkokkan kakinya? SULIT
A To decrease momentum

Untuk mengurangkan momentum
B To increase friction

Untuk menambahkan
C To increase impact time

Untuk menambahkan masa hentakan
D To decrease impulse

Untuk mengurangkan impuls

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17. The gravitational field strength on the Moon is 6 of the gravitational field strength on the

Earth. What is the weight of an object of mass 42 kg on the Moon?

1

Kekuatan medan graviti di Bulan adalah 6 daripada kekuatan medan graviti di Bumi.
Berapakah berta objek yang berjisim 42 kg di Bulan? Given /Diberi g = 9.81 ms-2

A 60 N
B 69 N
C 120 N
D 412 N

18. Diagram shows an astronaut with mass 60 kg that has travelled from Earth to the Moon.
Rajah menunjukkan seorang angkasawan dengan jisim 60 kg yang telah melakukan
perjalanan dari Bumi ke Bulan.

Which comparison is correct?
Perbandingan manakah adalah betul?

Mass/ Jisim Weight/ Berat
A Less/ Kurang Same/ Sama
B Same/ Sama Less/ Kurang
C More/ Lebih Same/ Sama
D Same/ Sama More/ Lebih

19. What shape is the path of a planet that surround the Sun?
Apakah bentuk laluan bagi sebuah planet yang mengelilingi Matahari?

A Focus
Fokus

B Ellipse
Elips

C Circle
Bulatan

D Perihelion
Perihelion

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20. Diagram below shows a communication satellites orbits around the Earth at the height of
35 000 km.
Rajah di bawah menunjukkan sebuah satelit komunikasi mengorbit mengelilingi Bumi pada
ketinggian 35 000 km.

If G = 6.67 x 10-11 N m2 kg-2, radius of Earth, R = 6.37 x 106 m and mass of Earth,
M = 5.97x1024 kg, calculate the gravitational acceleration at the position of the satellites.
Jika diberi G = 6.67x10-11 N m2 kg-2, jejari Bumi, R = 6.37 x 106 m dan jisim Bumi,
M = 5.97 x 1024 kg, hitung pecutan graviti pada kedudukan satelit itu.
Given /Diberi g = GM

r2

A 0.233 m s-2
B 2.327 m s-2
C 0.223 m s-2
D 23.27 m s-2

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Section B
Bahagian B
[30 marks]
[30 markah]
Answer all questions.
Jawab semua soalan.

1. (a) What is the meaning of

Apakah maksud bagi

(i) scalar quantity?

kuantiti scalar?
……………….……………………………………………………………………………………….

[ 1 mark/markah]
(ii) vector quantity?

kuantiti vektor?
……………….……………………………………………………………………………………….

[ 1 mark/markah]

(b) The list below consists of scalar and vector quantities.
Senarai di bawah terdiri daripada kuantiti skalar dan kuantiti vektor.

Acceleration, distance, speed, momentum, weight, displacement, velocity, energy,
work, force, temperature, density
Pecutan, jarak, laju, momentum, berat, sesaran, halaju, tenaga, kerja, daya,
suhu, ketumpatan

Classify the quantities above into two groups.
Kelaskan kuantiti di atas kepada dua kumpulan.

Scalar quantity Vector quantity
Kuantiti skalar Kuantiti vektor

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2. Diagram 2.1 shows a boy of mass 45 kg stands at stationary and a skateboard of 5 kg moves with
velocity 0.9 ms-1. Diagram 2.2 shows the boy jumps on the skateboard and moves with it.

Rajah 2.1 menunjukkan seorang budak berjisim 45 kg berdiri pegun dan sebuah papan luncur
berjisim 5 kg bergerak dengan halaju 0.9 ms-1. Rajah 2.2 menunjukkan budak itu melompat ke

atas papan luncur dan bergerak bersama-sama.

Diagram 2.1 Diagram 2.2
Rajah 2.1 Rajah 2.2

a) What is meant by momentum?

Apakah yang dimaksudkan dengan momentum?
……………………………………………………………………………………………………………..

[ 1 mark/markah]

b) Compare the total of momentum of the boy and the skate board before the boy jumped on

the skate board with the total momentum after the jumping.

Bandingkan jumlah momentum budak dan papan luncur sebelum budak itu melompat ke

atas papan luncur dengan jumlah momentum selepas lompatan.
……………………………………………………………………………………………………………..

[ 1 mark/markah]

c) (i) What happen to the velocity of the skateboard after the boy jumped on it?

Apakah yang berlaku kepada halaju papan luncur selepas budak itu melompat di

atasnya?
……………………………………………………………………………………………………

[ 1 mark/markah]

(ii) Calculate the velocity of the skateboard after the boy jumped on it.
Hitungkan halaju papan luncur selepas selepas budak itu melompat di atasnya

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d) Name the physics principle involved.

Namakan prinsip fizik yang terlibat.
……………………………………………………………………………………………………………..

[ 1 mark/markah]

3 Diagram 3.1 shows a boy kicking a ball.
Diagram 3.2 shows the same boy kicking another ball which is identical but is deflated.
Rajah 3.1 menunjukkan seorang budak lelaki menendang sebiji bola.
Rajah 3.2 menunjukkan budak yang sama menendang sebiji bola lain yang serupa
tetapi kempis.

Diagram 3.1
Rajah 3.1

Diagram 3.2
Rajah 3.2

The ball swerved due to impulsive force.
Bola itu melencong disebabkan oleh daya impuls.

(a) What is the meaning of impulsive force?
Apakah yang dimaksudkan dengan daya impuls?
…………………………………………………………………………………..
[1 mark/markah]

(b) Using Diagram 3.1 and Diagram 3.2, compare:
Menggunakan Rajah 3.1 dan Rajah 3.2, bandingkan:

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(c) (i) The displacement of the ball, AB
(d)
Sesaran bola itu, AB

………………………………………………………………………….
…………………………………………………………………………

[1 mark/markah]

(ii) The time of contact between the foot of the boy and the ball.

Masa tindak balas antara kaki budak lelaki itu dan bola.

…………………………………………………………………………
…………………………………………………………………………

[1 mark/markah]

(iii) The change of momentum of the ball

Perubahan momentum bola itu
…………………………………………………………………………

…………………………………………………………………………

[1 mark/markah]

Relate the displacement of the ball with:

Hubungkaitkan sesaran bola itu dengan:

(i) The time of contact between the foot of the boy and the ball

Masa tindakbalas antara kaki budak lelaki itu dan bola
…………………………………………………………………………
…………………………………………………………………………

[1 mark/markah]

(ii) The change of momentum of the ball

Perubahan momentum bola itu
…………………………………………………………………………

…………………………………………………………………………

[1 mark/markah]

State the relationship between the impulsive force and:
Nyatakan hubungan antara daya impuls dan:

(i) The time of contact between the foot of the boy and the ball

Masa tindakbalas antara kaki budak lelaki itu dan bola
…………………………………………………………………………
…………………………………………………………………………

[1 mark/markah]

(ii) The change of momentum of the ball

Perubahan momentum bola itu
…………………………………………………………………………
…………………………………………………………………………

[1 mark/markah]

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4. Diagram 4 shows gravitational force, F acting on a boy and a girl of mass 70 kg and 53 kg

respectively which separated at distance, r = 1.0 m.

Rajah 4 menunjukkan daya graviti, F yang bertindak pada seorang lelaki dan perempuan

berjisim masing-masing 70 kg dan 53 kg yang dipisahkan pada jarak, r = 1.0 m.

Diagram / Rajah 4

(a) State Newton’s Universal Law of Gravitation.
Nyatakan Hukum Kegravitian Semesta Newton.
…………………………………………………………………………………………….
…………………………………………………………………………………………….
…………………………………………………………………………………………….
[2 marks/markah]

(b) Gravitational force, F can be calculated by using formula:
Daya graviti boleh dihitung dengan menggunakan formula:

Where G is gravitational constant.
Dimana G adalah pemalar kegravitian.
(i) State the SI unit of G.

Nyatakan unit SI bagi G.

…………………………………………………………………………………………
[1 mark/markah]

(ii) Calculate the gravitational force, F.
Hitung daya graviti, F

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(c) Why the boy and the girl did not experience the effect of gravitational force toward

each other?

Mengapakah lelaki dan perempuan tersebut tidak merasai kesan daya graviti antara

satu sama lain?

…………………………………………………………………………………………….
[1 mark/markah]

Answer Section A:

Jawapan Bahagian A:

1 11
2 12
3 13
4 14
5 15
6 16
7 17
8 18
9 19
10 20

20

END OF QUESTION PAPER
KERTAS SOALAN TAMAT

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ANSWER SCHEME
UJIAN DIAGNOSTIK PASCA PKP

TINGKATAN 4 2020

Answer Section A:

Jawapan Bahagian A: 20 marks

1C 11 B
2D 12 B
3D 13 D
4A 14 B
5A 15 D
6B 16 C
7D 17 B
8C 18 B
9C 19 B
10 B 20 A

Section B/Bahagian B
[30 marks]/[30 markah]

QUESTION 1:
a(i) physical quantities that have magnitude only (1mark)
(ii) physical quantities that have both magnitude and direction (1 mark)

(b) (6 marks – all corrects) Vector quantity
Kuantiti vektor
Scalar quantity
Kuantiti skalar Acceleration
Momentum
Distance
Speed Weight
Energy Displacement
Work
Velocity
temperature force
density

QUESTION 2:

(a) Product of mass and velocity (1 mark)

(b) Total momentum before equal/same total momentum after the jumping (1 mark)

(c) (i) decrease

(ii) m1u1 + m2u2 = (m1 + m2) v

45(0) + 5(0.9) = (45 + 5) v (1m)

0 + 4.5 = 50 v (1m)

v = 4.5 /50 = 0.09 ms-1 (1m)

(d) Principle of conservation of momentum (1 mark)

QUESTION 3:

(a) The rate of change in momentum
(b) (i) displacement of the ball, AB in Diagram 3.1 is longer than 3.2

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(ii) the time of contact between the foot of the boy and the ball in Diagram 3.2 is longer

than 3.1

(iii) the change of the momentum of the ball in Diagram 3.1 and 3.2 are the same

(c) (i) the longer the time of contact between the foot and the ball, the shorter the displacement
of the ball
(ii) the greater the change of momentum of the ball, the greater the displacement of the ball

(d) (i) the longer the time of contact between the foot of the boy and the ball. The smaller the
impulsive force
(ii) the greater the change of momentum of the ball, the greater the impulsive force

QUESTION 4:

(a) Gravitational force between two bodies is directly proportional to the product of the masses

of both bodies and inversely proportional to the square of the distance between the centres

of the two bodies. (1 mark)

(b) (i) Nm2kg-2 (1 mark)

(c) F = 6.67 x 10-11 (70)(53) / 12 (1 mark)

F = 2.47 x 10-7 m (2 marks answer with unit)

(d) The gravitational between two bodies of small mass has a very small magnitude (1 mark)

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