# k2 1,2,3-1.doc

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Maklumat berikut mungkin berfaedah (simbol-simbol mempunyai makna yang biasa)1.a =

16.

2.v2 = u2 + 2as17.

3.s = ut + at2

4.Momentum = mv18.

+

5.F = ma19.Linear magnification /

Pembesaran linear,

6.Kinetic energy / Tenaga Kinetik

=

20.v = f

7.Gravitational potential energy /

Tenaga Keupayaan graviti = mgh

21. =

8.Elastic potential energy /

Tenaga keupayaan kenyal = Fx

22.Q = It

9.Power,

23.E = VQ

Kuasa,

24.V = IR

10. =

25.Power / Kuasa, P = IV

11.Pressure / Tekanan, P =

26.g = 10 ms-2

12.Pressure / Tekanan, P = hg27.

13.Heat / Haba, Q = mc(28.Efficiency / Kecekapan

14.Heat / Haba, Q = ml=

15. = constant / pemalar

29.E = mc2

Section A

Bahagian AAnswer all the questions / Jawab semua soalan

1Diagram 1 shows light rays parallel with the principal axis directed to a concave mirror.

Rajah 1 menunjukkan cahaya selari dengan paksi utama di arahkan ke cermin cekung

a) Complete the sentence below by ticking () the correct box.

Sempurnakan ayat di bawah dengan membuat tandaan () pada kotak yang betul

The light rays reflected by the mirror will

Cahaya dipantulkan oleh cermin akan

Converge at a focus point (F)

[ 1 mark / 1 markah]

b) Complete the ray diagram on Diagram 1 and mark F on the principal axis

Lengkapkan rajah sinar pada Rajah 1 dan tandakan F pada paksi utamanya

[2 marks / 2 markah]

c) What is the characteristic of image formed by the mirror in Diagram 1.

Apakah ciri-ciri imej yang terhasil pada rajah 1.

[1mark / 1 markah]2. Two solid materials both with the same mass 800 g are heated up with a heater of 1000 W.

Dua bahan pepejal mempunyai jisim yang sama 800 g dipanaskan dengan pemanas 1000 W.

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

Apakah maksud takat lebur suatu bahan.

............................

[1 mark] / [ 1 markah]

b) Based on the graph above, compare

Berdasarkan graf di atas, bandingkan

i. the specific heat capacity of both materials Y and Z.

muatan haba tentu kedua- dua bahan Y dan Z.

...

[1 mark] / [ I markah]c) i. State the melting points of Y and Z

Nyatakan takat lebur bahan Y dan Z

...................

[1 mark ] / [1 markah ]

ii) Calculate the specific latent heat of Z

Hitung haba pendam tentu pelakuran Z.

[ 2 marks ] / [2 markah ]

3. Diagram 3.1 shows a pendulum bob of mass 0.6 kg is hung on the ceiling.

Diagram 3.1

Rajah 3.1

a) In the Diagram 3.1, mark the direction and label the forces acting on the thread and the pendulum bob with label P and Q.

Pada Rajah 3.1 tandakan arah dan labelkan daya-daya yang bertindak kepada benang dan ladung dengan label P dan Q.

[2 marks] / [2 markah ]

b) The thread is pulled sideway by a force F, so that the thread makes an angle of 300 with the vertical line as shown in Diagram 3.2

Benang itu di tarik ke satu sisi dengan daya F supaya benang itu membuat sudut 300 dengan garis tegak seperti dalam Rajah 3.2

Diagram 3.2

Rajah 3.2

i. In the space below, draw the triangle of forces to show the three forces P, Q and F are in equilibrium.

Pada ruang di bawah, lukis rajah segitiga daya untuk menunjukkan tiga daya P, Q dan F dalam keseimbangan.

[2 marks] / [2 markah ]ii. Calculate the force F / Hitung daya F [2 marks] / [ 2 markah]Concave mirror / Cermin cekung

Diagram 1 / Rajah 1

Principal axis

Paksi utama

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