Fizik k2 f4 Akhir 06

Nama:……………………………... Tingkatan:……………….

SEKTOR SEKOLAH BERASRAMA PENUHBAHAGIAN SEKOLAH

KEMENTERIAN PELAJARAN MALAYSIA

PEPERIKSAAN AKHIR TAHUN 2006TINGKATAN 4

FIZIKKERTAS 2

Dua jam tiga puluh minit

(Anda dinasihatkan untuk memperuntukkan masa 90 minit untuk Bahagian A,30 minit untuk Bahagian B dan 30 minit untuk Bahagian C)

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU.

Untuk Kegunaan Pemeriksa

Bahagian Soalan Markah

1

2

3

4

5

6

7

A

8

1B

2

1C

2

Jumlah Besar

1.

2.

3.

4.

5.

6.

7.

8.

4531/2FizikKertas 2Nov 20062 ½ jam

Kertas soalan ini mengandungi tiga bahagian :Bahagian A, Bahagian B dan Bahagian CJawab semua soalan dalam bahagian A, satu soalandaripada Bahagian B dan satu soalan daripadaBahagian C.Jawapan kepada ketiga-tiga bahagian ini hendaklahdiserahkan bersama-sama.Jawapan kepada bahagian A hendaklah ditulisdalam ruang yang disediakan dalam kertas soalan.Jawapan kepada Bahagian B dan Bahagian Chendaklah dituliskan pada ruang jawapan yangdisediakan dalam kertas soalan ini. Walaubagaimanapun kertas tulis tambahan sekiranyadigunakan, perlulah diikat bersama dengan bukusoalan ini. Dalam jawapan anda, persamaan,gambar rajah, jadual, graf dan cara lain yang sesuaiuntuk menjelaskan jawapan anda boleh digunakan.Rajah tidak dilukis mengikut skala kecualidinyatakan.

Markah maksimum yang diperuntukkan ditunjukkandalam kurungan pada hujung tiap-tiap soalan ataubahagian soalan.Penggunaan kalkulator saintifik yang tidak bolehdiprogramkan

Kertas ini mengandungi 17 halaman bercetak

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[Lihat sebelah]SULIT

2

= Pemalar

Maklumat berikut mungkin berfaedah (simbol-simbol mempunyai makna yangbiasa)

1. Momentum = mv

2. F = ma

3. Tenaga kinetik = ½ mv2

4. Tenaga keupayaan = mgh

5. ρ =V

m

6. Kuasa =Masa

Tenaga

7. P = F / A

8. Haba, Q = mc

Haba Pendam, Q2 = mL

9. PVT

10. g = 10 ms-2

11. I = Ft = mv - mu

12. P = ρgh

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Section A(60 marks)

Answer all questions in this secton. .The suggested time allocated for you to answer this section is 90 minutes.

1. The figures below show a vernier caliper used to measure the diameter of ametal ball.

Figure 1.1 Figure 1.2

Figure 1.1 shows the position of the vernier scale when the jaws are closed.Figure 1.2 shows the position of the vernier scale when a metal ball is putbetween the jaws of the vernier calipers.

a) What is the zero error of the vernier calipers?

…………………………………………………………………………[ 1 mark]

b) What is the reading of the vernier calipers as shown in Figure 2.2?

…………………………………………………………………………[ 1 mark]

c) Calculate the diameter of the metal ball.

…………………………………………………………………………[ 1 mark]

d) If the device used is replaced by a micrometer screw gauge, whichdevice is more sensitive?

…………………………………………………………………………

[ 1 mark]

2. The diagram below shows the volume of water in a measuring cylinder beforeand after an object, Q of mass 50 g is placed inside it.( Volume of water before putting in the object is 150 cm3

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Volume of water after putting in the object is 230 cm3 )

Figure 2

a). Why does the object Q sink to the bottom of the measuring cylinder?

………………………………………………………………………………..

[1 mark]

b). What is the volume of the object Q.

………………………………………………………………………………..

[1 mark]

c). Calculate the density of block Q

[2 marks]

d). State one application of density in everyday life.

…………………………………………………………………………………

[1 mark]

3.

Q

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area 10 cm2 area 40 cm2

Figure 3 above shows the structure oto produce a bigger force. A and B a

a). A force of 20 N is applied to

i. Calculate the pressure on

ii. Calculate the force, F exe

iii. Find the ratio of the presspiston.

iv. Name the principle applie

………………………………

b). Piston P is pushed and movehas resulted in the piston Q m

i. How much has the piston

ii. What is the assumption m


5

oil

Figure 3

f a hydraulic system where a small force is usedre the cross-sectional areas of the pistons.

the smaller piston.

the smaller piston?

[1 mark]

rted on the larger piston.

[1 mark]

ure on the smaller piston to pressure on the larger

[1 mark]d in (a)ii.

…………………………………………………

[1 mark]

d to the right through a distance of 15 cm and thisoving a bit to the right.

Q moved?

[2 marks]

ade in obtaining the answer in (b)i.

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[1 mark]

iii. State one important property of the liquid used in the hydraulic brake.

[1 mark]

4.

Figure 4

Two solid materials both with the same mass 800 g are heated up with a heaterof 1000 W.

a) What is the meaning of the melting point of a material.

……………………………………………………………………………...[1 mark]

b) Based on the graph above, compare

i. the specific heat capacity of both materials.

……………………………………………………………………………[1 mark]

ii. their heat capacity

……………………………………………………………………………...[1 mark]

c) i. State the melting points of X and Y

1 2 3 4 5 6 Time/min

140

120

100

80

60

40

20

oC

Y

X

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0

0

1

1

………………………………………………………………………………[1 mark]

ii Calculate the specific latent heat of Y

[2 marks]

5. In a laboratory experiment, students investigate the relationship between theobject distance, u and the image distance, v for a convex lens. From the dataobtained, a graph is plotted as shown below.

a). i.th

ii.


7

0.2 0.4 0.6 0.8 1.0 1.2 1.4 16

.4

.8

.2

.6

State the value of the intercept at the 1/v axis when 1/u = 0 anderefore find the value of the focal length of the lens.

[2 marks]Name the quantity obtained from the reciprocal of the intercept at the 1/uaxis when 1/v = 0.

1/v (cm-1)

1/u (cm-1)

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…………………………………………………………………………………..

[1 mark]

b). Calculate the gradient of the graph.

[2 marks]

c). Obtain the characteristics of the image produced when

i. The object distance u is 0.5 cm.

……………………………………………………………………………[1 mark]

ii. The object distance u is more than 1.0 cm.

………………………………………………………………………………[1 mark]

6. Figure 6 below shows two masses 3 kg and 5 kg which are connected by alight inextensible string through a smooth pulley.

Figure 6

3 kg

5 kg

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a). In the figure above, mark and label the forces acting on the string and thetwo masses

[2 marks]b). In what direction does the 3 kg mass move?

…………………………………………………………………………………..[1 mark]

c). If T is the tension in the string,a is the acceleration of the masses,m1 = 5 kg, m2 = 3 kg,g is the acceleration due to gravity

i. Write down two equations relating T, a, m1, m2 dan g for eachmass.

[2 marks]

ii. Calculate the acceleration of both of the two masses and the tensionof the string.

[2 marks]

d). State one characteristic of the motion of the two masses.

[2 marks]

7. Figure 7.1 shows a bus moving with a velocity of 70 km/h and shows thecondition of a passenger standing in the bus when the brakes are suddenly applied.

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Figure 7.2 shows a cook trying to shake the sauce out of a bottle.

Figure 7.1 Figure 7.2

a.). Based on both of the figures above, state one characteristic experiencedby the passenger and the sauce .

….……………………………………………………………………………..[2 mark]

b). What is the velocity of the passenger.

i. before the bus driver brakes?

……………………………………………………………………………….[1 mark]

ii. after the bus driver brakes?

…………………………………………………………………………..[1 mark]

c) What is the velocity of the bottle when the sauce comes out?

……………………………………………………………………………….[1 mark]

d) i. based on the answer to b) ii, write a statement on the motion of thebus and its passenger.

……………………………………………………………………………….[2 mark]

ii. name the physics concept involved here.

…………………………………………………………………………….. …...[1 mark]

e) If you are chased by a baby elephant, how would you run away to saveyourself. Explain.

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Q

…………………………………………………………………………………..

…………………………………………………………………………………..[2 marks]

8.P

10 m

Figure 8 shows a woma

a) i. State the eneslope.

…………………………

ii. If the skater’energy when the skater

b) If 70% of the eposition Q, calculate

i. the kinetic en

ii. the velocity a

n

rg

sm

ne

e

t

4


11

Figure 8

skater descending a hill slope.

y changes occurring when the skater descends the hill

……………………………………………………[1 mark]

mass is 70 kg, calculate the change in potentialoves from P to Q

[2 mark]

rgy in a) ii. is changed into kinetic energy at

rgy at Q.

[2 mark]

Q

m

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[2 mark]

iii. what happens to 30% of the energy that is lost?

[1 mark]

(c) i. Assuming that the hill slope is frictionless, explain the motion of theskater as she skates down the hill.

…………………………………………………………………………………..

…………………………………………………………………………………..

[2 marks]

ii. State the principle of conservation of energy.

…………………………………………………………………………………..

[1 mark]

Bahagian B[20 marks]

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Answer any one question in this section.You are advised to spend 30 minutes on this section

1.

1. a). Diagram 1 shows pipe water being heated until it is boiling and itstemperature is recorded. Diagram 2 shows sea water being heated at the same rateuntil it is boiling and its temperature is recorded.

i). Define what is boiling point. [2 marks]

ii). Compare the difference between the boiling point of pipe water and theboiling point of sea water. Explain the relationship between boiling point andthe presence of impurities in water.

[4 marks]

iii. State other factors that influences the boiling point of water. [2 mark]

b). Explain why water is not used as a thermometric liquid. [2 marks]

c). If you are required by a factory that manufactures thermometers commonlyfound in laboratories to measure the temperature of a substance, explain how you canmake an efficient thermometer. In your explanation, emphasize the following aspects::

i. Strength of the thermometerii. Choice of the thermometric liquid

Pipe water sea water

100oC

110oC

Diagram 1 Diagram 2

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iii. Sensitivity of the thermometeriv. Design of the thermometer so that the scale can easily be readv. Calibration of the thermometer

[10 marks]

2.

Force

A student carries out an investigation to determine the strength of a spring byarranging the spring and the wooden block on an inclined plane as seen in the abovediagram. He compresses the spring by exerting a force on the spring. When the forceis removed, the distance traveled by the block up the slope is measured with ameasuring tape.

a. Explain what is meant by elastic potential energy. [1 mark]

b. Explain why the spring needs to be compressed with a large force to produce alarge displacement of the block.

[3 marks]

c. If a stone of mass 20 g is placed at the end of the spring and a force of 30 N isapplied to compress the spring a distance of 5 cm, calculate,

i. the elastic potential energy of the spring [2.marks]

ii. the kinetic energy of the stone when the spring is released. [2 marks]

iii. the velocity of the stone ejected. [2 marks]

d. Using an appropriate concept in physics, explain the modification required in thisexperiment so that it is more efficient and the block is ejected a longer distance away.

[10 marks]

Bahagian C[20 marks]

Answer any one question in this section.

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You are advised to spend 30 minutes on this section

3. The figure above shows the arrangement of apparatus to determine theexternal diameter of a metal pipe.

(a) i. What is meant by diameter? [1 mark]ii Explain the function of the wedges used in the set up of the apparatus

shown in the figure above [2 marks]

(b) The table below shows the characteristics of some instruments ofmeasurement K, L, M, and N that are used for measuring a quantity of length.

Characteristic

Instrument

Smallestdivision on thescale

Range of measurement Ability to measurediameter

Level of sensitivity

K 0.1 cm a few metres Able, with thehelp of set squares

Low

L 0.01 mm less than 2 cm Able High

M 0.1 cm up to 1 m Able, with thehelp of set squares

Low

N 0.01 cm up to 10 cm Able Average

Based on the table, explain the suitability of the characteristics of theinstruments for measuring the internal diameter of a beaker. Determine whichinstrument is most suitable for measuring the internal diameter of a beaker. Justifyyour choice.

[10 marks]

(c) You are given a piece of copper wire, glass rod and a meter rule.

i. Explain how the diameter of the copper wire can be determined.[4 marks]

ii A few turns of the copper wire produced a displacement of water ofvolume 0.5 cm3 when the wire is placed in water. Calculate the length of copper wireused if the diameter of wire is 0.1 mm

[3 marks]

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4. A researcher is studying four materials P, Q, R and S that have been shaped inthe form of a wing. The shape of their cross-sections are shown in the table below.

*assume that the shape is fixed and cannot be inverted.

(a) i. Explain the meaning of fluid. [1 mark]ii State Bernoulli’s principle. [2 marks]

(b) Study the material and their characteristics in relation to their suitability to bemade into a wing of a light-weight plane. Determine the most suitable material forthis purpose and give the reasons for your answer.

[10 marks]

(c) i Explain the advantages of having a light-weight racing car with a powerfulengine. [3 marks]

ii A light-weight racing car with a powerful engine may have a risk ofskidding unless a big downward force presses it on the road. Which of the fourmaterials in the above table is most suitable to be fitted in a racing car? Explain youranswer. [4 marks]

1

DIAGNOSTIC TEST FORM 4 - 2006

MARKING SCHEME : PHYSICSPAPER 2

Section A

Sec Mrk Answer Remarks

Question 1

(a) 1 0.02 cm

(b) 1 1.73 cm

(c) 1 1.73 – 0.02 = 1.71 cm

(d) 1 Micrometer screw gauge

Total 4

Queston 2

(a) 1 Density of object > density of water

(b) 1 230 – 150 = 80 cm3

(c) 11

50/80= 0.625 g cm-3

(d) 1 to test the purity of materials/buoyancy/hydrometer Other relevant answers

Total 5

Queston 3

(a) (i)(ii)(iii)(iv)

1111

P = 20/10 = 2.0 N cm-2

F = 40(20/10) = 80 NRatio = 2.0/2.0 = 1Pascal’s Principle

(b) (i)

(ii)

(iii)

111

1

15(10) = 40 xx = 3.75 cmThe pressure of the smaller piston is fully transmittedto the larger pistonNot compressible / does not evaporate easily/ is notcorrosive

Total 8

Question 4

(a) 1 The temperature at which the solid changes into liquid

(b) (i)(ii)

11

cX > cY

Heat capacity of Y > X(c) (i)

(ii)

1

1

1

X = 80 0C, Y = 100 0C

pt = ml

1000(4 – 1.5)60 = 0.8 l

l = 18750 J/kgCorrect substitutionans & unit

Total 6

2

Queston 5

(a) (i)

(ii)

11

1

1.4

f = 1/1.4 = 0.714 cm

focal length

(b) 1

1

- 1.4/1.4

- 1.0

or other correct valuesread from graphno units

(c) (i)(ii)

11

Virtual, upright, magnified

Real, inverted, magnified

any twoany two

Total 7

Question 6

(a) 1

1

Label for both masses

(b) 1 Upwards

(c) (i)

(ii)

11

11

m1g - T = m1aT – m2 g = m2 a

20 = 8 a

a = 2.5 m s-2

(d) 11

move with the same accelerationin opposite directions

Total 9

Question 7

(a) 11

The passenger moves forward and

the chilli sauce comes out from the bottle

(b) (i)(ii)

11

70 km/h

the same velocity that is 70 km/h

(c) 1 zero velocity

(d) (i)

(ii)

1

1

1

when the bus brakes, the velocity of the bus decreases

suddenly

the passenger continues to move with its initial velocity

inertia

(e) 1

1

I must run in a zig zag manner

The baby elephant continues to move in a straight line when

I change my direction suddenly

Total 10

T, tension

W, weight

3

Question 8

(a) (i)(ii)

1

1

1

Potential energy changes to kinetic energy

E = mg(h2 – h1)

= 70(10)(10 – 4)

= 4200 J

(b) (i)

(ii)

(iii)

1

1

1

11

EQ = (70/100)(4200)

= 2940 J

½ m v2 = EQ

½ (70) v2 = 2940

v = 9.165 m s1

the energy has been changed to heat

(c) (i)

(ii)

11

1

her velocity is higher than the situation before because

there is no loss of energy converted to heat

The total energy in a closed system is constant/ energy is

neither created nor destroyed.

Total 11

Bahagian B

SOALAN 1Bhgn Markah Skema catatan(a) i

ii.

iii

2

1

11111

the boiling point is the temperature at which a liquidproduces saturated vapor pressure equals to the atmosphericpressure.sea water contains salt /impurities causing boiling point tobe higherbecause sea water is difficult to vaporizemore energy is required to change sea water to vaportherefore a higher temperature is required to boilatmospheric pressuretype of liquid

(b) 11

water evaporates easily causing reading to be inaccurate/water sticks to the walls of the tube/higher specific heat capacity

Any two of three

(c) 111111111

thermometer is made from transparent glass that is strongso that it is not easily brokenthe thermometric liquid chosen is mercurybecause it easily expands uniformlythe capillary tube is made narrow and thinso that it is more sensitivethe shape of the thermometer is roundso that it has a magnifying effectthe thermometer is placed in melting ice to obtain the lower

4

1pointthe thermometer is placed in steam from boiling water toobtain the upper point

Jum 20SOALAN 2(a). 1 is the energy stored in a spring when it is extended or

compressed(b) 1

11

Larger compression produces bigger elastic potentialenergyElastic potential energy is changed to kinetic energyLarger kinetic energy produces higher velocity

(c) i

ii..

iii.

1111

11

Elastic P E = ½ Fx= ½ 30(0.05)= 0.75 J

K E = elastic P E= 0.75 J

½ (0.02)v2 = 0.75v = 8.66 m/s

(d) 1111

111111

use a spring with a bigger diameterso that k is biggerthe spring is made from steelbecause the type of material influences ka larger k produces a bigger elastic P E elastic P Echanges to K Espring is greatly compressedso that elastic PE is biggerslope of inclined plane is 45 degreesso that distance is maximum

Jum 20

Bahagian C

Bhg Mrk Jawapan Catatan

Soalan 3(a) i

ii

1

11

The distance between two sides of a sphere through thecentre of the sphereTo bring the sides of the pipe closer to one anotherTo show that the reading of the side of the pipe is verticallystraight to the scale of the ruler

(b) 11

11

11111

The small reading of scale 0.01 cm is chosenBecause it is suitable for the internal diameter of the beakerto be measuredThe range of measurement from 0 to 10 cmis the suitable range for the use to measure diameter of thebeakerable to measure the diameter directlywithout the help of set squaresthe level of sensitivity is averagetherefore suitable to measure the diametertherefore the choice of the measuring instrument that is

5

1suitable is N.This is because its range of measuement is 0 – 10 cm, it isable to measure the diameter without the help of set squares,the level of sensitivity is average and the smallest divisionon the scale is 0.01 cm which is not too big.

(c) i

ii

1

1

1

1

111

A piece of wire round closely to the glass rod until its lengthis big enoughUsing a meter rule measure the length of wire wound at theglass rod, say x cmThen calculate the number of wire wound around the glassrod, say y circumferenceThe diameter of the wire can be determined , x/y cm

Using the formula V = (d/2)2lV = 0.5 cm3

(0.01/2)2l = 0.5l = 6.37 X 103 cm

Jum 20

Bhg Mrk Jawapan Catatan

Soalan 4(a) i

ii111

Fluid is either liquid or gasWhen the speed of a fluid increases its pressure decreasesWhen the speed of a fluid decreases its pressure increases

(b) 1111

11

1

1

11

The density of the material should be lowSo that its weight is lowThe melting point should be highTo be able to withstand high temperature achieved duringflightThe material must be very strongTo be able to withstand very strong force exerted on thewing during flightShaped with a curved surface at the top and a flat surface atthe bottomTo achieve an upward lifting force when moving at highspeedThe most suitable is QBecause of its relatively low density, high melting point,high strength and correct shape of aerofoil

(c) i

ii

1

11

1111

Acceleration of the car is directly proportional to the forceacting on the carInversely proportional to its massHence a light weight racing car with a powerful engine willachieve a higher accelerationMaterial RIts shape will result in a downward forceThat prevents the car from being lifted upIts high melting point allows it to withstand hightemperature when the car is moving at high speed

Jum 20

Fizik k2 f4 Akhir 06

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