Bahagian BSection B

[12 markah]

Jawab mana-mana satu soalan daripada bahagian ini.Answer any one question from this section

3. Rajah 3.1 menunjukkan seorang budak lelaki mengangkat seketul batu di dalam air laut. Rajah 3.2 menunjukkan budak lelaki tersebut mengangkat batu itu di permukaan air laut. Ia merasa jauh lebih berat dari sebelumnya.

Diagram 3.1 shows a boy lifted up a rock in the water.Diagram 3.2 shows the boy lifted up the rock at the surface of the water. He feel much heavier than before.

Berdasarkan Rajah 3.1 dan 3.2 dan pengetahuan anda mengenai daya keapungan:Base the Diagram 3.1 and 3.2 and your knowledge of buoyant force:

(a) Buat satu inferens yang sesuaiState one suitable inference

[ 1 Markah ]

(b) Nyatakan satu hipotesis yang sesuai dan boleh disiasatState one suitable hypothesis.

[ 1 Markah ]

(c) Dengan menggunakan radas seperti bongkah logam/selinder logam, bikar, neraca dan lain-lain radas, terangkan satu rangka kerja eksperimen untuk menyiasat hipotesis yang anda nyatakan dalam 3 (b)

With the use of apparatus such as metal block/iron cylinder, beaker, spring balance and others, describe an experiment framework to investigate the hypothesis stated in 3(b).

Dalam penerangan anda jelaskan perkara berikut:In your description, state clearly the following :

i) Tujuan eksperimenAim of the experiment

ii) Pembolehubah yang terlibat.Variables in the experiment.

iii) Senarai radas dan bahanList of apparatus and materials.

iv) Susunan RadasArrangement of the apparatus

v) Prosedur eksperimen.Terangkan bagaimana mengawal dan mengukur pembolehubah dimanipulasikan dan bagaimana mengukur pembolehubah bergerak balas.The procedure of the experiment.Describe how to control and measure the manipulated variable and how to measure the responding variables.

vi) Cara untuk menjadualkan dataThe way to tabulate the data

vii) Cara untuk menganalisis dataThe way to analyse the data

[ 10 Markah ]Jawapan Bahagian B soalan 3 (kertas 3) Daya dan Tekanan (smkdas)

SECTION BQuestion 3Mark Sectio

nAnswer

1 3 (a) State a suitable inferenceThe Volume of water displaced affects the buoyant force berat cecair yang disesarkan oleh objek adalah sama dengan daya tujahan

1 (b) State relevant hypothesis (with direction)The greater the water displaced the greater the buoyant forceSemakin besar berat air tersesar semakin besar daya apungan

1 (c) Dercribe a complete and suitable experimental framework1 State the aim of the experiment

To investigate the relationship bertween the volume of water displaced and the buoyant force.Mengkaji hubungan diantara isipadu air tersesar dengan daya apungan

1 State the manipulated variable and the responding variablesmv – the volume of water displaced Isipadu air tersesarrv- buoyant force daya apungan

1 State the constant variableCv – the density of water Ketumpatan air

1 List out the important apparatus and materialsUreka can, triple beam balance, 100 ml beaker water, iron rod

1 State the method of controlling the manipulated variable- Immerse the iron rod into water and measure the immerse distance

eg. 1.0 cm1 State the method of measuring the responding variable

Measure the mass of the water collected from ureka can and find the weight.Where

Weight = mass x acceleration due to gravity.1 Repeat the experiment at least 4 times with different values

Repeat the different immerse distance.