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SULIT 1 4531

4531 © 2016 Hak Cipta PPDJB SULIT

Section B

[20 marks]

Answer all questions in this section.

5 (a) Diagram A and Diagram B show the light rays from two identical objects passing through

the convex lenses, J and K. Both the lenses produce virtual images. F is the focal point for

each lens.

Rajah A dan B menunjukkan sinaran cahaya daripada dua objek yang serupa melalui kantacembung, J dan K. Kedua-dua kanta menghasilkan imej maya. F adalah tempat tumpuan

bagi setiap kanta.

Diagram 5.1/ Rajah 5.1


(i) What is meant by virtual image? Apakah yang dimaskudkan imej maya?

[1 mark/1 markah]

(ii) With reference to Diagram A and Diagram B, Dengan merujuk kepada Rajah 5.1 dan Rajah 5.2

compare the thickness of the lenses,bandingkan ketebalan kanta

compare the focal lengthbandingkan panjang fokus

compare the size of image produced by the lenses J and K.bandingkan saiz imej yang dihasilkan oleh kanta J dan K

State the relationship between the size of the image and the focal length Nyatakan hubungan antara saiz imej dan panjang focus



SULIT 2 4531


State the relationship between the power of the lens and the focal length.

Nyatakan hubungan antara kuasa kanta dan panjang fokus

[5 marks/5 markah]

(b) Explain why a piece of paper burns when placed under a convex lens aimed towards hot

sun rays.Terangkan mengapa sekeping kertas terbakar apabila diletakkan di bawah kanta cembung

yang ditujukan kea rah sinaran matahari yang panas.

[4 marks/4 markah]

(c)


Using an appropriate physics concept, suggest and explain suitable modifications or ways

to enable the microscope in Diagram 5.3 to increase its efficient and to form a brighter and

clear image. Your modification can be emphasized on the following aspects: Menggunakan fizik konsep yang sesuai, cadangkan dan terangkan pengubahsuaian yang

sesuai untuk membolehkan miksoskop dalam Rajah 5.3 meningkatkan kecekapan dan untuk

menghasilkan imej yang cerah dan jelas. Pengubahsuaian anda boleh hendaklah

menekankan kepada aspek-aspek berikut:

(i) The selection of lens as objective lens and as an eyepiece

Pemilihan kanta objektif dank anta mata

(ii) The position of the object

Kedudukan objek

(iii) The position of the eyepiece lensKedudukan kanta mata

(iv) The distance between the objective lens and eyepiece

Jarak anta kanta objek dank anta mata

(v) Condition of the place to store the microscope

Keadaan penyimpanan mikroskop itu

[10 mark/10 markah]



SULIT 3 4531


Section C

[20 marks]

Answer all questions in this section.

6. (a) Diagram 6.1 shows spring Q is used to hang a 100 g of slotted weight. Diagram 6.2 shows

conditions of spring Q after 500 g of slotted weight hung to it is removed.

Rajah 6.1 menunjukkan spring Q digunakan untuk menggantung 100 g jisim berslot. Rajah 6.2 menunjukkan keadaan spring Q selepas 500 g jisim berslot yang digantung

kepadanya dialihkan.

Diagram 6.1/ Rajah 6.1 Diagram 6.2/ Rajah 6.2

(i) What is the meaning of elastic limit? Apakah maksud had kenyal?

[1 mark/1 markah]

(ii) Based on Diagram 6.2, explain how the spring Q loses its elasticity.

Berdasarkan Rajah 6.2, jelaskan bagaimana spring Q hilang kekenyalannya.

[1 mark/1 markah]

(b) Original length of a spring is 10 cm. The spring extends to 15 cm when 100 g slotted

weight is hung to the spring.

Panjang asal spring ialah 10 cm. Spring itu memanjang menjadi 15 cm apabila 100 g jisimberslot digantung kepadanya.

(i) Calculate the magnitude of the spring constant.

Hitungkan nilai pemalar spring.

[3 marks/3 markah]



SULIT 4 4531


(ii) Calculate the work done by the spring.

Hitungkan kerja yang dilakukan oleh spring itu.

[2 marks/2 markah]

(c) Diagram 6.3 shows tennis player hits the ball using a racquet.

Rajah 6.3 menunjukkan pemain tenis memukul bola menggunakan raket.


You are required to investigate the characteristics of a tennis racquet as shown in Table 6. Anda diminta untuk menyiasat ciri-ciri raket tenis seperti yang ditunjukkan dalam Jadual 6.

Racquet Brand

Jenama raket

Strength of the

stringKekuatan tali

Material of

the racquet Bahan raket

Size of handle

Saiz pemegang

Mass of the

racquet (g) Jisim raket (g)

A Low/ Rendah Titanium

Fully grip

Genggam

penuh

800.0

B Low/ Rendah

Laminated

woodKayu

berlamina

Partially grip

Separa

genggam

730.0

C High/ Tinggi Titanium

Fully gripGenggam

penuh

340.0

D High/ Tinggi

Laminatedwood

Kayu

berlamina

Partially grip

Separa

genggam

110.0



SULIT 5 4531


Explain the suitability of each characteristic of the tennis racquet. Determine the most

suitable tennis racquet that can be used to improve his performance. Give reason for your

choice.

Terangkan kesesuaian ciri-ciri raket tenis itu. Tentukan raket tenis yang paling sesuai

digunakan untuk meningkatkan prestasi pemain itu. Berikan sebab pilihan anda.

[10 marks/10 markah]



SULIT 6 4531


MARKING SHCEME

Section B

5. (a) (i) Cannot be projected on the screen

Tidak boleh dipancarkan pada skren

1

(ii) - Lens J is ticker or vice versa

Kanta J lebih tebal atau sebaliknya

- Focal length of lens J is shorter

Panjang focus kanta J lebih pendek

- Size of image of lens J is bigger

Saiz imej kanta J lebih besar

- The bigger the size of image the shorter the local length

Lebih besar saiz imej lagi pendek panjang focus

- The shorter the focal length the higher the power of lens

- Semakin pendek panjang focus semakin tinggi kuasa kanta

1

1

1

1

1

(b)

parallel light ray from the sunsinar cahaya yang selari dari matahari

light rays is convergesinar cahaya ditumpukan

at focal point

di titik fokus

light energy change to the heat energytenaga cahaya ditukar kepada tenaga haba

1

1

1

1

(c) Aspect Reason

Shorter focal of objective lens

Panjang focus pendek untuk kantaobjektif

High power

Kuasa tinggi

Longer focal length of eyepiece lensPanjang focus panjang untuk kanta

mata

To magnified the imageUntuk membesarkan imej

Object between F and 2FObjek diantara F dan 2F

To produce a real, inverted and

magnified image

Untuk menghasilkan imej nyata,

terbalik dan dibesarkan

Bigger than objective lens

Lebih besar daripada kanta objektif

Image produce always less than

focal Imej yang terhasil sentiasa kurang

dari fokus

More than f o + f e Lebih daripada f o + f e

Produce image at normal adjustment

Menghasilkan imej pada pelarasan

normal

Dry condition

Keadaan kering

Prevent fungus

Mengelakkan kulat

10

TOTAL 20



SULIT 7 4531


Section C

6. (a) (i) Maximum force that applied to the elastic material before it lost its

elasticity.

1

(ii) -The spring will extend when 100 g slotted weight is applied

-Extension is directly proportional to the force applied (Hooke’s law)

- the force is increases until exceed the elastic limit

-The spring cannot return to its original shape.

1

1

1

1

(b) (i) Extension, x= 15-10= 5 cm

F = kx

k= 0.1/5

= 0.02Ncm-1

1

1

1

(ii) Work done =Ep

=1/2kx2

= 0.25 J

1

1

(c)

Characteristics Explaination

High strength of string -Not easily break//last longer

made of titanium Lighter

Fully grip Increase the force

Low mass//340.0g Easy to move//increase accelerations

Brand CHigh strength of string, made of titanium,

fully grip and low mass

2

2

2

2

2

TOTAL 20

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