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TEKNIK SKOR A FIZIK PAPER 2 (SECT ION B&C)

6 A U G U S T 2 0 1 6

S M K C O N V E N T J A L A N P E E L C H E R A S K L

AWESOME PHYSICS…A+ -MRSM TGB +SMK CONVENT CHERAS _2

SECTION B

SECTION C


UNDERSTANDING QUESTION (4marks) EXAMPLE:

1. Explain why the safety belt worn by the driver has a wide surface area and it can expand when the driver is surged forward.

ANSWER MARK

Explain for wide surface area

Reduce the pressure acting on the body

F

PA

the bigger the area, the smaller the pressure

1

1

Explain for the expansion

Increase the time of impact

Reduce the impulsive force mv mu

Ft

bigger t, smaller F

1

1

TOTAL 4

2. Using the concepts of momentum and inertia, explain why the speed limit and the load limit must be imposed on heavy vehicles.

ANSWER MARK

Momentum depends on mass and velocity // p=mv

High momentum causes a high (impulsive) force to act on the lorry when an accident occurs // mass increase, momentum increase

Inertia depends on mass

Difficult to stop the lorry (when the mass is big // the speed is high) // Difficult to control the lorry // Difficult to control the direction of the lorry

1 1

1 1

TOTAL 4

3. Explain how the forces between molecules cause the elasticity.


COMPARISON (5 marks) EXAMPLE:

1. Diagram 10.1 and Diagram 10.2 show how water spurts out from its container when

the valve is opened.

Diagram 10.1 Diagram 10.2

When a liquid is held in a container, it exerts pressure on the container.

With reference to Diagram 10.1 and Diagram 10.2, compare the depth of water in both

containers, the rate at which water spurts out and the distance travelled by the water

spurts out.

Relate the distance travelled by the water that spurts out to the depth of the water.

Hence make a conclusion regarding the relationship between the pressure and the depth

of the water.

ANSWER:

Characteristics Diagram 10.1 Diagram 10.2 MARK

The depth of the water higher lower 1

The rate at which water spurts out

higher lower 1

Distance travelled by the water spurts out

Higher lower 1

Depth increase, distance travelled by the water spurts out increase 1

Depth increase, pressure of water increase 1

Or

- The depth of the water in Diagram 10.1 is higher than in Diagram 10.2 - The water spurts out in Diagram 10.1 is at a higher rate than in Diagram 10.2 - The water spurts out further in Diagram 10.1 than in Diagram 10.2 - The deeper the water, the further the distance of water spurt - The deeper the water, the higher the pressure of the water


MODIFICATION (10 marks) EXAMPLE:

1. Diagram 10.3 shows a submarine.

Diagram 10.3

Using appropriate physics concept, explain the suitable characteristics of the submarine that can work efficiently and safe. Your explanation should include the following characteristics:

i. Shape of submarine ii. Strength of material for the body of submarine iii. Rusting rate of the material used iv. Component for submarine to submerge or float v. Type of power source used

ANSWER:

Characteristics Reason

Shape of submarine is streamline Reduce water friction while moving

High strength material Withstand high water pressure while submerging

Low rusting rate material Long lasting without rust

Installed with ballast tank Can be filled with water if submerge and water can be pressure out if float

Use nuclear power The power is efficient and save cost

2. Diagram 9.3 shows a spring of the suspension system in an ordinary motorcycle.

Diagram 9.3

Using the suitable physics concepts, you are required to give some suggestions on designing a racing motorcycle of 500cc. Explain your suggestions based on the following aspects;

i. density of motorcycle parts ii. engine power iii. spring in suspension system iv. size of tyre v. the designs of the spring

ANSWER:

Characteristics Reason

Low density of motorcycle parts So that it is lighter

High engine power To produce high acceleration// high resultant force

High spring constant // Stiffer spring

So that the spring is stiffer // Motorcycle bounce less // less vibration

Wide tyre // smooth tyre To increase stability // To reduce friction

High strength Spring is not easily broken


EXTRA QUESTION: TRIAL KELANTAN 2014

1. Diagram 1 shows a cross section of a damn.

Diagram 1

Compare the thickness of the wall of the damn at lower part and at upper part. Explain your answer.

[4 marks]

2. Diagram 2 shows a scuba diver suit.

Diagram 2

Using the appropriate physics concepts, explain the suggestions on the characteristics and the design of the diver suit so that it is suitable to be worn by a deep sea scuba diver. Your answer should include on the following aspects:

(i) Type and characteristic of the material (ii) Density of material. (iii) Thickness (iv) Size of the suit.

[10 marks]


FULL FORMAT SECTION B (20 marks) TRIAL SBP 2015

1.

Diagram 9.1 and Diagram 9.2 show light ray is passing through a water prism and a glass prism. The refractive index of water is 1.33 and the refractive index of glass is 1.51.

Water prism Critical angle of water = 48.8o

Glass prism Critical angle of glass = 41.5o


(a) What is the meaning of the refractive index? [1 mark]

(b) Using Diagram 9.1 and Diagram 9.2, compare the incident angle, the refractive index

and the critical angle of the water prism and the glass prism. Relate the refractive index with the critical angle. Regarding to the comparison between the incident angle and the critical angle, deduce the light phenomena involved.

[5 marks]

(c) Diagram 9.3 shows a diamond ring and a glass ring.

Diagram 9.3 Explain why the diamond ring sparkles more than the glass ring when light passes through them.

[4 marks]


(d) Diagram 9.4 shows a simple telescope constructed in a laboratory that can be used to see distant object. However the disadvantages of using this simple telescope are it is not portable and the image formed is not clear and inverted.

Diagram 9.4

You are required to design a new optical instrument which use prisms. The instrument is portable and can produce brighter and upright image. State and explain the modifications based on the following aspects:

i. Type of prisms used ii. Arrangement of prisms iii. The focal length of the lenses used iv. Diameter of the lenses v. Additional features that is required.

[10 marks]

TOTAL 20 marks

Every day May not be

Good But there is something

Good in Every day


EXTRA QUESTION (edited)

2. Diagram 10.1 and Diagram 10.2 show the deflection of the galvanometer when a bar magnets are pushed into two identical solenoids.

Diagram 10.1

Diagram 10.2

(a) What is meant by electromagnetic induction? [1 mark]


(b) Using Diagram 10.1 and Diagram 10.2, (i) State the magnetic pole at the end P when the bar magnets are pushed into the

solenoids. [1 mark]

(ii) Compare the number of bar the magnets and the deflection of the galvanometer.

[2 marks]

(c) State the relationship between (i) The number of bar magnets and the strength of the magnetic field,

[1 mark]

(ii) The strength of the magnetic field and the deflection of the galvanometer. [1 mark]

(d) You are given two coils R and S, with 50 and 100 turns respectively, an iron core

and a 240V a.c. power supply. All the materials are used to build a simple transformer.

(i) Using all the materials supplied and with the aid of a labelled diagram(s), explain how you are going to build a simple step-up transformer.

[4 marks]

(ii) Suggest modifications that need to be done to the transformer to increase its efficiency.

[6 marks]

(iii) Explain the working principle of a transformer. [4 marks]

TOTAL 20 marks


FULL FORMAT SECTION C (20 marks) TRIAL MRSM 2007

1.

Diagram 1.1 shows a load hanging from a rope. Diagram 1.2 shows the similar rope breaking when another load is hung on it. Forces are exerted on the ropes when loads are hung on it.


(a) What is the meaning of force? [1 mark]

(b) (i) Explain why the rope does not break in Diagram 1.1 while the rope breaks in

Diagram 1.2. [2 marks]

(ii) State the energy change when the object in Diagram 1.2 falls to the ground and

sketch two graphs to represent the energy change against time. [3 marks]

(c) Diagram 1.3 shows a child playing on a swing. The mass of the child is 15 kg

and the angle of swing with the vertical is 15o.

Diagram 2.3


(i) Calculate the tension of the rope. [3 marks]

(ii) If another child of weight 250 N plays on the swing, will the rope break if its

maximum tension is 300 N? [1 mark]

(d) Diagram 1.4 shows the side view of a car.

Diagram 1.4 Table 1.5 shows four safety car seats K, L, M and N with different specifications. You are required to determine the most suitable car seat and the way it is positioned on the front passenger seat, for babies’ safe travel. Explain the suitability of each characteristic of the car seat and position. Determine the most suitable car seat and position. Give a reason for your choice.

K

Car seat fastened facing the front

L

Car seat fastened facing the rear


M

Car seat fastened facing the rear

N

Car seat fastened facing the front

Table 1.5

[10 marks]

TOTAL 20 marks


EXTRA QUESTION (edited)

2. An engineer uses radioisotope to design a system to detect the thickness of card in a factory.

(a) (i) What is meant by isotope? [1 mark]

(ii) Explain the arrangement of the apparatus used to detect the thickness of card.

State how radioactivity is used to detect the thickness of the card. [3 marks]

(b) Table 2 shows the characteristics of five different radioisotopes.

Characteristics of isotope

Radioisotope Physical

state Radiation emitted

Penetrating

power Half-life

V Gas Alpha Low 30 days

W Liquid Beta Moderate 8 months

X Liquid Gamma High 2 years

Y Solid Beta Moderate 32 years

Z Solid Gamma High 60 seconds

Table 2

Based on Table 2, explain the suitable characteristics of the radioisotopes to be used to detect the thickness of card. Select the most suitable isotope to be used and give your reasons.

[10 marks]

(c) Sketch activity against time graph to show the decay of a radioactive substance. Explain how the half-life is determined.

[4 marks]

(d) The half-life of radon-22 is 4 days. Calculate the time taken for the activity of this isotope to decay to 6.25% of its initial value.

[2 marks]

TOTAL 20 marks


PAPER 3 (TEMPLATE)

INFERENCE RV depends on MV

HYPHOTESIS MV increase, RV increase Or MV increase, RV decrease

AIM To investigate the relationship between ……….MV……….. and ……….RV…………….

VARIABLES MV : RV : FV :

LIST OF APPARATUS

ARRANGEMENT OF APPARATUS

PROCEDURE

TABULATE DATA

MV RV

ANALYSING DATA

RV

MV


PAPER 3 SECTION B

PLANNING EXPERIMENT:

EXAMPLE: Diagram 1 shows two different situations of a skier by wearing ordinary shoes and then

wearing snow shoes. The mass of ordinary shoes and the snow shoes are the same.

Diagram 1

Based on your observations on the depth of sinking of the skier in the snow by wearing

ordinary shoes and by wearing snow shoes.

Inference: depth of sinking depends on surface area

1. INFERENCE 2. HYPHOTESIS 3. AIM 4. VARIABLES 5. LIST OF APPARATUS 6. ARRANGEMENT OF APPARATUS 7. PROCEDURE 8. TABULATE DATA 9. ANALYSING DATA

CLUE CAUSE

(MV) EFFECT

(RV) EXPERIMENT

1. Same mass // same force 2. Different shoe // surface area of the

shoe 3. Ordinary shoe sink (low surface

area cause high pressure)

Surface area Pressure (depth of sinking)

Pressure (P and A)


TRIAL KEDAH 2013

1. Diagram 1 shows part of a dam. The wall at the bottom is made thicker to withstand higher pressure.

Diagram 1

With the use of apparatus such as a thistle funnel, a tall glass jar, manometer and others apparatus, describe an experiment to investigate the hypothesis stated above.

Inference:

CLUE CAUSE

(MV) EFFECT

(RV) EXPERIMENT


SPM 2015

2.

Diagram 2.1 shows an incubator connected to a power supply of 240 V by thin copper wire. Diagram 2.2 shows an identical incubator connected to power supply of 240 V by thicker copper wire. It is observed that the bulb in Diagram 2.2 is brighter.

Diagram 2.1

Diagram 2.2

With the use of apparatus such as a constantan wire, ammeter and other apparatus, describe an experiment framework to investigate the hypothesis stated above.

Inference:

CLUE CAUSE

(MV) EFFECT

(RV) EXPERIMENT


CLONE SPM

3.

Diagram 3.1 and Diagram 3.2 shows two fishermen that are rowing similar boats. The boat in Diagram 3.1 is fully loaded whereas the boat in Diagram 3.2 is not loaded. It is found that the boat in Diagram 3.2 easier to rowing than the boat in Diagram 3.1.


With the use of apparatus such as a hacksaw blade, plasticine and other apparatus, describe an experiment framework to investigate the hypothesis stated above.

Inference:

CLUE CAUSE

(MV) EFFECT

(RV) EXPERIMENT


4. Diagram 4.1 and Diagram 4.2 show an assembly in a school hall. In Diagram 4.1, a prefect discovered that a few rows of student could not hear the principal’s voice clearly.

Diagram 4.1

When the two speakers are far apart as in Diagram 4.2, the prefect found that more rows of students could hear the principal’s voice clearly.

Diagram 4.2

With the use of apparatus such as a signal generator, speakers and other apparatus, describe an experimental framework to test your hypothesis.

Inference:

Difficult roads often lead to beautiful destinations…. Good luck

…

CLUE CAUSE

(MV) EFFECT

(RV) EXPERIMENT

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