TRIAL SPM Section B AND C Paper 2

7/29/2019 TRIAL SPM Section B AND C Paper 2

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Section B

[20 marks]

Answerany one in section B

9. Diagram 9.1 shows the effect of pressure on a sandy beach when a man sits on a chair.

Diagram 9.2 shows the same man sitting on the same chair after a piece of plank is placedunder the chair. Rajah 9.1 menunjukkan kesan tekanan ke atas pasir di tepi pantai apabila seorang lelaki

sedang duduk di atas kerusi. Rajah 9.2 menunjukkan lelaki yang sama duduk di atas kerusi

yang sama selepas diletakkan sekeping papan di bawah kerusi itu.

(a) (i) What is the meaning of pressure?

Apakah maksud tekanan? (1 mark)

(ii) Observe diagram 9.1 and 9.2. compare the depth of sinking, the load and the area of

contact with the sandy beach.

Relate the depth of sinking with the pressure exerted by the chair to make a deduction

on the relationship between the pressure and the area of contact in this situation.

Perhatikan rajah 9.1 dan rajah 9.2. bandingkan kedalaman bahagian yang tenggelam,

beban dan luas kawasan yang bersentuhan dengan pasir di pantai itu.

Hubungkaitkan kedalaman bahagian yang tenggelam dengan tekanan yang dikenakan

oleh kerusi untuk membuat kesimpulan tentang hubungan antara tekanan dengan luas

kawasan yang bersentuhan dalam situasi ini. (5 marks)


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(b) Diagram 9.4 shows a vacuum cleaner

Rajah 9.4 menunjukkan sebuah pembersih vacuum.

Explain how the vacuum cleaner is able to remove dust from the floor

Terangkan bagaimana pembersih vakum itu dapat membersihkan lantai daripada habuk.

(4 marks)

(c) A car needs an efficient hydraulic brake system for safety purposes. Suggest and explain

how to build a hydraulic brake system which can function effectively, based on the

following aspect:

Sebuah kereta memerlukan satu sistem brek hidraulik yang cekap untuk tujuan keselamatan.

Cadang dan terangkan bagaimana untuk membina satu sistem brek hidraulik yang dapat

berfungsi secara berkesan berdasarkan aspek-aspek berikut.


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(i) The type of the brake fluid

Jenis bendalir brek

(ii) The characteristic of the brake fluid

Sifat bendalir brek

(iii) The size of the master

Saiz omboh utama

(iv) The size of the slave piston

Saiz omboh kedua

(v) The material used for the fluid transmision pipe

Bahan yang digunakan untuk paip penghantaran cecair

(10 marks)

18

10 (a) Diagram 10.1 and Diagram 10.2 shows two identical electromagnet, X and Y .Rajah 10.1 dan Rajah 10.2 menunjukkan dua elektromagnet yang serupa, X dan Y.

Diagram 10.1 Diagram 10.2

(i) What is meant by electromagnet?Apakah yang dimaksudkan dengan elektromagnet?


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[ 1 mark]

(ii) Using Diagram 10.1 and Diagram 10.2 compare the current flow, the amount ofiron filing and the magnetic field strength of the two electrodes. Relate the current

flow and amount of iron filing attracted by the electromagnet and the magnetic fieldstrength.Menggunakan Rajah 10.1 dan Rajah 10.2 bandingkan pengaliran arus, kuantiti

serbuk besi dan kekuatan medan magnet kedua-dua elektrod. Hubungkait

pengaliran arus dengan kuantiti serbuk besi yang tertarik kepada elektromagnet

dan kekuatan medan magnet.

[ 5 marks ]

(b) Diagram 10.3 shows a circuit breaker.

Rajah 10.3 menunjukkan sebuah pemutus litar.

Diagram 10.3 19

Explain how the circuit breaker works.

Terangkan bagaimana pemutus litar berfungsi.

[ 4marks]


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(c) Diagram 10.4 shows an a.c generator

Rajah 10.4 menunjukkan sebuah penjana a.u

Diagram10.4

(i) Explain how the generator works to produce alternating current.

Terangkan bagaimana penjana berfungsi untuk menghasilkan arus ulang alik.

[ 4 marks ]

(ii) Explain the modification that needs to be done on the generator and the external

circuit to enable the generator to be a d.c generator and produce more current.

Terangkan pengubahsuain yang perlu dibuat kepada penjana dan litar luar untuk

membolehkan penjana menjadi penjana a.t dan menghasilkan arus yang lebih tinggi.

[6marks]


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20

Section C

[20 marks]

Answerany one in section C

11. Diagram 11.1 shows a cargo ship is sailing in sea water.Rajah 11.1 menunjukkan sebuah kapal kargo sedang belayar di lautan.

Diagram 11.1

(a) Name the physics principle involved which makes the ship float in sea water.Namakan prinsip fizik yang terlibat yang membuatkan kapal itu terapung di lautan.

[1marks]

(b) Explain why the ship can float in sea waterTerangkan mengapa kapal boleh terapung di dalam air laut.

[2marks]

(c ) Plimsoll lines are marked at the sides of the ship.Garis-garis plimsol ditandakan pada tepi kapal itu.

(i) State the purpose of plimsoll linesNyatakan kegunaan garis plimsol itu.

(ii) Explain why plimsoll lines have many levels.Terangkan mengapa garis plimsol itu mempunyai banyak aras.

[2marks]


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(d) Table 11.2 shows the characteristics of four structures of ship P, Q, R, and S.Jadual 11.2 menunjukkan ciri-ciri bagi empat struktur kapal P, Q, R,dan S.

Structure

of shipsStruktur

kapal

ShapeBentuk

Strength Of

the metal

usedKekuatan

logamyangdigunakan

Ship Base Cross

section areaLuaskeratanrentas

dasarkapal

Volume of the air

space in the shipIsipaduruanganudara

dalamkapal

P StreamlinedLarus

HighTinggi

WideLuas

HighTinggi

Q OvalBujur

LowRendah

WideLuas

HighTinggi

R CircleBulat

HighTinggi

Smalkecil

LowRendah

S StreamlinedLarus

LowRendah

Smallkecil

LowRendah

Table 11.2

As a researcher in a ship manufacturing company, you are assigned to study thestructure used to make the ship to support heavy cargoes..

You are given four choices of the structures P, Q, R and S. The table above shows the

structures of the boat.

Sebagai seorang penyelidik dalam syarikat pembinaan kapal, anda dikehendaki mengkaji

struktur kapal yang sesuai untuk membina kapal yang dapat menampung kargo yang berat.Anda di berikan empat pilihan struktur P,Q,R dan S. Jadual di atas menunjukkan struktur-

struktur kapal itu.

Explain the suitable characteristics of the structure to be used to make the ship.Determine the most suitable structure to be used to make the ship to support heavy

cargoes.

Give reasons for your choice.

Terangkan ciri-ciri struktur yang sesuai untuk digunakan untuk membuat kapal itu.


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Tentukan struktur yang paling sesuai untuk digunakan untuk membina kapal yang dapat

menampung kargo yang berat. Beri sebab untuk pilihan anda.

[ 10marks]

22

(e)

Diagram 11.2

Diagram 11.2 shows a load X is placed on a wooden block. Both of them is then placed

in water of density 1000 kgm-3. The mass of the wooden block is 3 kg and the density is800 kgm-3.

Rajah 11.2 menunjukkan satu beban X di letakkan diatas sebuah bongkah kayu. Kedua-duanyadi masukkan ke dalam air yang menpunyai ketumpatan 1000

kgm-3. Jisim bongkah kayu itu adalah 3 kg dan ketumpatannya adalah 800 kgm-3.

(i) Calculate the volume of water displaced by the load and the wooden block.Hitungkan isipadu air yang disesarkan oleh beban dan bongkah kayu itu.

[ 2marks]

(ii) Calculate the mass of the load X .Hitungkan jisim beban X tersebut.

[3marks]


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12. Diagram 12.1 shows a patient is being fed with medicine from an intravenous injection

( IV ) bottle. The medicine from the IV bottle is able to enter the patients vein due to thedifference in pressure.

Rajah 12.1 menunjukkan seorang pesakit disalurkan ubat melalui botol suntikan intravenus ( IV ).

Ubat dari botol IV boleh dialirkan kepada pesakit disebabkan oleh perbezaan tekanan.

DIAGRAM 12.1

(a) State one factor that affect the pressure in liquid.Nyatakan satu faktor yang mempengaruhi tekanan dalam cecair.

[1 mark]

(b) Explain how the medicine flows from the IV bottle into the patients vein.Terangkan bagaimana ubat mengalir dari botol IV kepada vena pesakit.

[4 marks]

(c) Diagram 12.2 shows a water supply system. Water from a water storage tank ispumped to the water tank of a house in a housing estate.Rajah 12.2 menunjukkan sistem bekalan air. Air daripada tangki penyimpan air

dipam ke tangki air sebuah rumah dalam suatu kawasan perumahan.


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Table 12 shows the specifications of four water storage tanks, P, Q, R and S, that can

be used to store water in a housing estate.Jadual 12 menunjukkan speksifikasi empat tangki penyimpan air, P, Q, R dan S, yang digunakan

untuk menyimpan air untuk sebuah rumah dalam suatu kawasan perumahan.

Water storage tankTangki penyimpan air P Q R S

Material usedBahan yang

digunakan

metallogam

concretekonkrit

concretekonkrit

metallogam

DensityKetumpatan

lowrendah

hightinggi

lowrendah

lowrendah

ShapeBentuk

Height from theground

Tinggi daripada bumi

lowrendah

hightinggi

hightinggi

lowrendah

TABLE 12

You are required to determine the most suitable water storage tank. Study the specifications of

all the four water storage tanks based on the following aspects :

Anda diminta untuk mengenal pasti tangki penyimpan air yang paling sesuai. Kaji spesifikasi keempat-

empat tangki penyimpan air itu berdasarkan aspek :

- The material used/Bahan yang digunakan

- The density of the tank/Ketumpatan tangki

- The shape of the tank/Bentuk tangki

- The height of the tank from the ground/Ketinggiantangki daripada bumi

Explain the suitability of the aspects.

DIAGRAM 12.2


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Terangkan kesesuaian aspek-aspek tersebut.

[10 marks]

25

( d ) Diagram 12.3 shows a manometer with arms of different cross section. Liquid Yof density 1 200 kg m-3 is poured into the manometer. The level of liquid Y is

found to be the same at both arms of the manometer.Rajah 12.3 menunjukkan sebuah manometer dengan lengan yang berbeza keratan

rentasnya. Cecair Y dengan ketumpatan 1 200 kgm-3 diisi ke dalam manometer. Paras

cecair Y didapati sama pada kedua-dua lengan manometer.

i. Explain why the level of liquid Y in both arms of the manometer are

equal.Terangkan mengapa paras cecair Y pada kedua-dua lengan manometer adalah

sama. [2 marks]

ii. Diagram 12.4 shows the condition of liquids when another immiscible

liquid, X, is poured into the right arm of the manometer. Calculate thedensity of liquid X.Rajah 12.4 menunjukkan keadaan cecair apabila sejenis cecair yang tak

bercampur, X, dituang ke dalam lengan kanan manometer tersebut. Hitung

ketumpatan cecair X.

[3 marks]

DIAGRAM 12.4DIAGRAM 12.3


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Number Answer Mark

9 (a) Pressureis defined as normal force per unit area//p=F/A, where

p=pressure, F = force and A=area

1

(b)

-Depth of sinking in Diagram 9.1 is deeper than in Diagram 9.2 l

-The weight of the man in Diagram 9.2 and Diagram 9.1 is equal //-Area of contact with the sand in Diagram 9.2 is larger than Diagram 9.1

- the higher the dept of sinking, the higher the pressure-th higher the area contact, the lower the pressure

1

11

1

1

(c)(i)

(ii)

the fan blow air out of the vent

produce a partial vacuum area in the vacuum cleaner

difference in pressure occurs/atmospheric pressure is higher thanthe pressure inside the vacuum cleander

forced is exerted in/pushed in the dirt

11

11

(d) aspect explanationUse oil Incompressible/no air buble

High boilingpoint/low density

Does not evaporate easily/lighter

Small Master piston To produce high pressure

Big slave piston To produce a big force on the disc

Aluminium/steel for

tansmision pipe

Strong/does not rust easily

2

2

2

2

2

Total 20

SET 2

10 (a) (i) Electromagnet is a device in which magnetism is produced by an

electric current // temporary magnet made by winding a coil round a

soft iron core and magnetic field produce when current flow.

1

(ii) Current flow in diagram 10.2 is more than 10.1 // vice versa.

The amount of iron filing attracted by iron core in Diagram 10.2

1

1


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is more than 10.1 // vice versa.

The magnetic strength in diagram 10.2 is more than 10.1 // vice

versa.

Amount of iron filing attracted increase when current increase

The magnetic field strength increase when current increase

1

11

(b)

When too high current flow, magnetic field strength become verystrong / wire expand

electromagnet pull the soft iron armature / pulled to the right by

spring P.

release the catch, contact separate and current does not flow

When reset button is pressed, spring Q pulls the soft iron

armature back to its original position

1

11

1

(c) (i) When the coil rotates the coil cut across the magnetic field lines

Induced current flow in the coil.

The current maximum when the coil cut the magnetic field at right

angle // current decreased (become zero) when the coil move inparallel with magnetic field lines

The direction of current flow determine by using Flemings right

hand rule

After 90o the direction of current in the external circuit reversed/

1

1

1

11

(Max :

4)

(ii) Modification Explanation

Change slip rings withcommutator

To reverse contact with brushes so that thecurrent flow in same direction in external

circuit

Use stronger magnet To increase the magnetic field strength

Use more number of turnfor the coil/ Increase the

speed of rotation

Increase the rate of change of magneticfield/increase the induced current

2

2

2

Total 20

11 (a) Archimedes Principle 1

(b

)

1. Total density of ship < density of water

2. Buoyant Force = Total weight of ship

1

1

(c) (i) To ensure the ship will not be overload // ensure the safety of ship 1(ii) To enable the ship to travel safely in different densities of sea water 1

(d

)

Characteristics Reason

Streamlined shape To reduce water resistance

High strength of metal To withstand high water pressure

Wide base cross sectionarea

So that ship can float//prevent fromoverturn // ship more stable // ship


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10

(e) (i) Volume of water displaced = Volume of wooden block

= m

=800

3

= 3.75 x 10-3 m31

1

(ii) Weight of load + Weight of wooden block = weight of water displaced

Weight of load + Weight of wooden block = V g

Weight of load + (3 x 10) = 1000 x 3.75 x 10-3

x 10Weight of load + (3 x 10) = 37.5

Weight of load = 37.5 30= 7.5 N

Mass of load = 0.75 kg

11

1

Total 20

12. (a) Depth // density //g 1

(b) -Pressure increased with height

-Pressure in IV bottle is greater than the patients vein-Medicine flowing from IV bottle because height produced difference in

pressure// Medicine flow from higher pressure to lower pressure

- gravitational pull // weight of liquid

1

11

1

(c) Choices Explanation

Made of concrete Stronger / Not easy to break

// metal can rust easily

low density lighter / the structure that hold the

tank able to withstand the weight of

tank

thicker wall at the bottom //

Diagram

able to withstand the higher pressure

at the bottomheight from ground is high to produce a greater difference in

pressure

R is chosen Made of concrete, low density,

thicker wall at the bottom, height

from ground is high

10

(d) (i) -Atmospheric pressure at both side is equal

-Pressure does not depends on size of arm

1

1


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(ii) Patm + h1y g = P atm + h2x g

( 10 x 10 -2 ) ( 1 200 ) ( 10 ) = ( 16 x10 -2 ) ( x ) ( 10 )

x = 750 kgm-3

1

1

1

Total 20

Documents

TRIAL SPM Section B AND C Paper 2