manusia... manusia... manusia...

2009-10-17T20:08:00.000-07:00

Bila kita dalam kesusahan, kawan kita yang betol2 kita percaya belum tentu akan menolong kita. Dan mungkin orang yang kita x sangka2 yang akan menjadi teman yang mendengar semua cerita kita, juga akan menolong kita menyelesaikan masalah kita. Dunia x pernah adil. Terkadang orang yang kita sangat percaya mungkin akan tikam kita dari belakang n ambil kesempatan terhadap diri kita sekarang nie. Dan tak mustahil sekiranya ada kawan yang kita cerita semua dan segalanya tentang diri kita akan mencceritakan segala masalah kita kepada orang lain dengan alasan ingin berjenaka. Zaman sekarang ini, tiada siapa yang boleh kita percaya sepenuhnya. Jangan pernah berharap bahawa akan ada orang yang sentiasa bersama kita bila2 masa sebab kita tak boleh nak jangka apa yang berlaku. Orang lain tak akan faham apa yang kita rasa. Mungkin mereka akan mempersendakan perkara yang kita cuba sampaikan. Mereka juga mungkin akan mempersendakan perkara yang kita paling sayang. Mungkinkah ketawa mereka itu tidak akan membuat sesiapa terasa. Mereka tidak merasainya. Mereka tidak pernah merasakan apabila mereka dihina, diherdik. Yang hanya mereka tahu, keseronokan dunia yang membawa makna yang tak seberapa. Perasaan ingin dihargai mulalah timbul dalam diri mangsa keadaan tersebut. Mengapakah dunia ini tidak adil?? Tidak adakah orang yang ingin memihak kepadanya?? Hanya kerana dia perenah melakukan satu kesilapan yang sangat kecil, dia dibenci ssemua orang. Setiap manusia melakukan kesilapan. Setiap manusia berhak menerima peluang kedua. Dimanakah peluang keduanya?? Atau mungkin dia tidak berhak mendapat tempat di dalam dunia yang kian ke penghujungnya. Hanya Allah saja yang tahu apa yang dirasainya. Alhamdulillah kerana telah diperkenalkan dunia kepada seseorang yang dipandang hina seterusnya berjuang untuk meneruskan kehidupan yang mungkin tidak memihak kepadanya.

MNG267QAK

22:09=16/10/09

kem prs fom 2

2009-10-12T01:24:00.000-07:00

1st tyme being a photographer

ni la keje aku mse kem prs fom 2...

keje nie orang kate senang...

tp keje nie la yg paling meletihkn...

my best partner..

mke2 yg condct kem prs fom 2 dri mule smpe abis..

sume yg tlibat ngn kem nie...

keletihan lepas 3 hari wt keje non-stop

wlupn kem 2 dh abis..

tp keje utk dsiapkn ad blambak lg....

xm slaras 2...

2009-08-27T10:32:00.000-07:00

xm nie rsenye ok la...
tp 1 paper yg aku fail n rmai gler dak laen yg fail....

FIZIK...
nie killer subject kowt..
dlm kelas aku 3orang je yang llus..
zaki.. bips... mus'ab...
yang laen semue hancur...
aku lak dpt 36 je..

NAH KORANG SOALAN FIZIK XM SLARAS 2 2009

Answer all the questions
1. Diagram 1 shows a metal sphere of 2 kg moving along a
smooth horizontal surface, PQ at a speed of 4 m s-1. The
sphere then moves up a rough surface QR, where R is 0.4 m
above the level of PQ.

R

Metal sphere rough surface 0.4 m

P Q
Smooth surface
Diagram 1

(a) What type of energy does the metal sphere have at the
initial stage of its motion?
[ 1 mark ]
...............................................................................................................................................

(b) Calculate the magnitude of energy in (a) [ 2 marks ]

(c) If the velocity of the sphere at R is 1 ms-1, calculate the change in energy from Q to R.
[ 2 marks ]

(d) What is the change in the gravitational potential energy when the sphere moves fromQ to R? [ 2 marks ]

(e) Calculate the loss in energy when the sphere moves from Q
to R.
[ 2 marks ]

2. Diagram 2.1 shows a water container filled with hot tea when taps X and Y are turned off.
Diagram 2.2 shows the condition of the flow of hot tea when both taps are turned on.
Hot tea
Diagram 2.1

Hot tea
Diagram 2.2

(a) What is meant by pressure? [ 1 mark ]
...............................................................................................................................................
..............................................................................................................................................
(b) The water container with height of 50 cm is fully filled with hot tea. Given that taps X and Y are turned off.
Calculate the pressure of hot tea in the water container.
( Density of hot tea is 1350 kg m-3, gravitational acceleration is 10 ms-2 ) [ 2 marks ]

(c) (i) Based on Diagram 2.1 and Diagram 2.2, compare the pressure of hot tea at the level
of tap X and tap Y. [ 1 mark ]

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

(ii) Draw the jet of liquid flowing out of taps Y in Diagram 2.2. [ 1 mark ]
3. A hydraulic jack system is used to raise a van at a service centre for motor vehicles as shown in Diagram 3. The piston is moved by an electric motor to raise the van.
Diagram 3
(a) What is the physics principle applied in the hydraulic system? [ 1 mark ]
......................................................................................................................................................
(b) (i) Explain how the vans [ 2 marks ]
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
(ii) What can you observe if the release valve of the tube is left open? [ 1 mark ]

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(c) State two advantages if an oil is used as a hydraulic fluid instead of water. [ 2 marks ]
....................................................................................................................................................
....................................................................................................................................................
(d) The diameters of the piston R and S are 3 cm and 30 cm respectively. Piston R gives
a force of 200 N. What is the maximum force acting on piston S? [ 2 marks ]

4. Diagram 4.1 shows an empty fishing boat of volume 100 m3 in the sea. Diagram 4.2 shows when the boat is seated with a fisherman and filled with some fishes, the boat floats with one fifth of its volume above the water level. Density of sea water is 1100 kg m-3.

Diagram 4.1
Diagram 4.2
(a) State and lable the direction of the forces acting on the boat and its load on Diagram 4.1
[ 2 marks ]

(b) Explain why the boat is floating at rest in the water.
[ 1 mark ]
...............................................................................................................................................

(c) Calculate the weight of the boat when it is seated with
fisherman and filled with some fishes. [ 3 marks ]

(d) What happends to the boat if all the fishes are thrown into the sea?
Explain your answer. [ 3 marks ]

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

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

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

5. Diagram 5.1 shows a manometer attached to a non uniform horizontal tube. The manometer is filled with water.

Diagram 5.1
(a) Explain why the two water levels in the two arms of the manometer are at the same height. [ 1 marks ]
................................................................................................................................................
................................................................................................................................................
(b) Air is passed through the horizontal tube as shown in Diagram 5.2

Diagram 5.2

(i) Compare the speed at P and Q. [ 1 marks ]

...................................................................................................................................
(ii) Compare the pressure at P and Q. [ 1 marks ]

..................................................................................................................................
(iii) On Diagram 5.2, mark the water levels in the two arms of the manometer as the air is flowing in the horizontal tube. [ 1 marks ]
(iv) Name the principle involved in this observation. [ 1 mark ]
...................................................................................................................................
(v) The cross of the wings of and aeroplane is shaped like an aerofoil. Draw an aerofoil and explain how if produce lifting force on the aeroplane. [ 4 marks ]

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

For Question 6, write your answer on a seperate blank paper.
6. Table 6 shows the specifications of four water storage tanks, P, Q, R and S, that can be used to store water.

Water storage tank
P
Q
R
S
Material used
metal

concrete

concrete

metal

Density
low

high

low

low

Shape

Height from the ground
low

high

high

low

Table 6
Explain the suitability of each specifications of water storage tanks in table 6.
Determine the most suitable water storage to be used.
[10 marks]
(copied directly from our physics teacher's blog)
(cikgukayphysics.blogspot.com)

NIE JAWAPAN DIE

soalan1
(a) Kinetic Energy
(b) ½ (2) (4)2 = 16 J
(c) ½ (2) (4)2 - ½ (2)(1)2 = 15 J
(d) 2(10)(0.4) = 8J
(e) 15 J – 8 J = 7 J

soalan2
(a) Pressure is normal force per unit area
(b) 50/100 (1350)(10)=6750J
(c) (i) Py > Px
(ii) Refer to diagram

soalan3
(a) Pascal’s Principle
(b) (i)Piston R is pressed, pressure is transmitted trough
the liquid, Valve Y is open and valve X is closed.
(ii) Liquid is released and the van is move downward
(c) Incompressible
Not easy to evaporate
(d) FS = AS X FR = X15X15 X 200 = 20000N
AR X1.5 X1.5

soalan4
Buoyant Force

Gravitational Force

(a) Buoyant force and Weight
(b) Buoyant force = weight
(c) W = 1100 ( 4/5 X 100 ) (10)
= 880000 N
(d) Level of the boat will be higher because
the weight of the boat and load is decrease,
it will displaced less water.

soalan5
(a) Only atmospheric pressure exected on both end.
(b) (i) VQ > VP
(ii) PQ < PP
(c) On diagram
(d) Bernoulli’s Principle
(e) An aerofoil

The upper part of the wing is more curve than the lower part.
The velocity of air rushing past the upper part larger than the lower part
This create a lower pressure area at upper part of wing compare to lower part
The different in pressure wil create a lift force

soalan6

Characteristic and Explanation

Material used is concreate
To avoid rusted
Low density
Not heavy
Shape

Like diagram R
Can withstand high pressure at greater depth
Height from ground is high
Can exert higher pressure
R becouse it is made of concreate, has low density, can withstand high pressure at greater depth and located at high position from ground.

baru nk join....

2009-05-16T23:59:00.000-07:00

salam...
name aku nazrin ghazali...
aku bru nk join buat blog nie...
so kalo xbes 2 tgur la ek....

life is like a brutal labyrinth

manusia... manusia... manusia...

kem prs fom 2

xm slaras 2...

baru nk join....