Paper2 Final Form4

SMK KOTA KEMUNING, SHAH ALAMPANITIA FIZIK

FINAL EXAM FORM FOUR2009

4531/2

PHYSICSPaper 2

2½ HOURS Two Hours and Thirty Minutes

DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO

1. The questions are written in English.

2. The diagrams in the questions are not drawn to scale unless stated.

3. The marks allocated for each question or part question are shown in brackets.

4. If you wish to change your answer, cross out the answer that you have done. Then write down the new answer.

5. You may use a non-programmable scientific calculator.

Examiner’s Name

Section Question Mark Score

A

1 4

2 6

3 7

4 7

5 8

6 8

7 12

8 8

B9 20

10 20

C11 20

12 20

Total

This booklet consists of 18 printed pages

The following information may be useful. The symbols have their usual meaning.

1.

2. v2 = u2 + 2as

3. s = ut + at 2

4. Momentum = mv

5. F = ma

6. Kinetic energy = mv2

7. Gravitational potential energy = mgh

8. Elastic potential energy = Fx

9. Power, P =

10. =

11. Pressure, P =

12. Pressure, P = h

13. Heat, Q = mc

14. Heat, Q = ml

15. constant

16. n =

17.

18.

19. m =

20. v = f

21. =

22. Q = It

23. E = VQ

24. V= IR

25. E = V + Ir

26. Power, P = IV

27.

28. Efficiency

29. E= mc2

30. g = 10 m s-2

31. Atmospheric pressure = 1 105 Pa

2

Section A

[ 60 marks ]

Answer all questions.

You are advised to spend 90 minutes on this section.

1 Figure 1 shows a boy as he jogs from A to C and back to B.

(a) Name one physical quantity relating to the boy’s position as he jogs ?

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

(b) What is the type of the physical quantity that you state in (a) ?Tick the correct answer in the box provided.

Scalar quantity

Vector quantity [1 mark]

(c) If he took 50 s to complete the motion, calculate his average velocity.

[2 marks]

Figure 1

A BC65 m 35 m

Physics Paper 2 SMKKK 2009

2 Figure 2 shows the bubbles containing saturated vapour produced in boiling water.

(a) Based on figure 2, compare

(i) the depth the bubbles at P and Q

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

(ii) the pressure of water at P and Q

………………………………………………………………………………………………. [1

mark](iii) the volume of the bubbles at P and Q

…………………………………………………………………………………………………... [1

mark]

(b) Based on your answer in 2(a),

(i) relate the depth of the bubbles with the pressure exerted by the water

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

(ii) relate the pressure exerted by water with the volume of the bubbles

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

(c) State the gas law involved.

4

Figure 2

Water

Bubble

P

Q


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

3 Figure 3.1 shows an object hanging from a spring balance. The reading of the spring balance is 5.5 N. The object is then immersed in water and the reading is now 5.0 N as shown in figure 3.2.

Figure 3.1 Figure 3.2

(a) What is the weight of the object ?

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

(b) Another force ,F is acting on the object in Figure 3.2,

(i) Mark and label the force, F in Figure 3.2

(ii) Name the force, F

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

(c) (i) Determine the magnitude of the force, F.

[1 mark]

(ii) Calculate the volume of the object.

[2 marks]

5

5.0 N4.5 N

Object


(d) State the physics principle involved in Figure 3.2.

…………………………………………………………………………………………………...

[1 mark]

4 Diagram 4 shows the heating curve of a solid substance Y which has a mass of 250 g and is heated by a heater rated as 80 W.

Diagram 4

(a) Based on the graph above, name the state of substance Y at ST,TU and UV.

ST: …………………………………..

TU: …………………………………..

UV : ………………………………….. [3 marks]

(b) Explain why the temperature of substance Y remains constant at TU although heat is supplied.

…………………………………………………………………………………………………...

…………………………………………………………………………………………………...

6

Temperature/ oC

Time/minute

40

100

T U

V

S

02

9 12


[2 marks]

(c) Based on the graph, determine the specific heat of fusion of substance Y.

[2 marks]5 Figure 5 shows a model of a hydraulic jack. A force of 20 N was applied on the small piston

W to support two same material loads which placed on piston X and Y . Both of the loads are stationary.

(a) Name the principle used in the hydraulic jack.

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

(b) Calculate the pressure exerted on piston W in S.I .

[2 marks](c) Based on the diagram above, compare

(i) the fluid pressure at X and Y

7

20 N

W

X Y

S

AW = 4 cm2

Figure 5


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

(ii) weight of the load on X and Y

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

(iii) surface area of piston X and Y

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

(d) Based on the answer in (c) , state the relationship between the surface area and the weight that can be supported by the piston.

…………………………………………………………………………………………………..

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

(e) Give one reason why it is more suitable to use a liquid instead of air as the hydraulic fluid.

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

6 Figure 6.1 shows a boy cycling along the road. Figure 6.2 shows a ping- pong ball coated with metal paint oscillating in an electric field.


Based on figure 6.1 and figure 6.2,(a) State the transformation of energy in

(i) Figure 6.1 : ……………………………………………………………………….

(ii) Figure 6.2 : ………………………………………………………………………..

[2 marks]

8


(b) Explain your answer in 6(a).

………………………………………………………………………………………………

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

(c) Name the law of physic’s involved in 6(a) and 6(b)

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

(d) Figure 6.3 shows an object of mass 200 kg pushed from rest at A by a force, F of 1600 N,along an incline plane AB which is at 30 o angle to the horizontal. The vertical height of B from A is 5 m.

Figure 6.3

(i) Calculate the distance AB.

[2 marks](ii) Calculate the work done by the force, F.

9

F= 1600 N

200 kg

5 m

30 o


[2 marks]

7 Figures 7.1 and 7.2 show two identical ships which being towed into harbour by two boats J and J . Both boats exert the same force of 3.5 kN .

Figure 7.1

Figure 7.2

Figure 7.1 shows that both boats exert the force at an angle of 15 to the path of the ship while Figure 7.2 is at an angle of 30 .

(a) What is the meaning of resultant force?

……..……………………………………………………………………………………………

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

(b) Sketch a vector diagram in the space below, to show how the formation of resultant force in Figure 7.1 and Figure 7.2. [2 marks]

10

Ship

Boat J

Boat K

30

60

Boat J

Boat K

Ship


Diagram of resultant force for Diagram 7.1 Diagram of resultant force for Diagram 7.2(c) (i) In the space below, draw the scale drawings of the triangles of forces to determine the

magnitude of resultant force for both Figures 7.1 and 7.2 .

[ Use the scale 1 cm : 1 kN ]

[4 marks]

Resultant force for Figure 7.1 = ………………… N

Resultant force for Figure 7.2 = ………………….. N

(ii) Based on your answer in (c) (i) , which is the most suitable method to tow the ship? Give one reason for your answer.

………………..…………………………………………………………………………...

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

11


(d) If the mass of the ship is 1000 kg , the air and water resistance are 2000 N , find the acceleration of the ship in Figure 8.2 .

[2 marks]

(e) What is the relationship between the angle between the two boats and the resultant force exerted by the boat?

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

8 Figure 8.1 shows a tanker with a mass of 4900 kg. The trailer is carrying petrol in one big tank.

Figure 8.1

(a) If the tanker starts from rest and achieves a velocity of 40 ms-1 in 20 s, calculate

(i) its acceleration.

[2 marks](ii) The force acting on the tanker.

[2 marks]

(b) The tanker in Figure 8.1 is used for transporting large amounts of petrol. Suggest modifications that can be made based on the following aspects.(i) number of tyres

……………………………………………………………………………………….

12


[1 mark](ii) Reason

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

(iii) number and size of tanks

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

(iv) Reason

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

Section B

[ 20 marks ]

Answer any one question.


9 Figure 9.1 shows the coolling curve of 10 g of naphthalene.Figure 9.2 shows the cooling curve of 80 g of naphthalene.

13

Figure 9.1


(a) What is meant by latent heat?[1 mark]

(b) Using Figures 9.1 and 9.2 , compare the mass of naphthalene, time taken for the naphthalene to solidify and the latent heat released.

Relate the mass of naphthalene with the heat released to deduce a relevant physics concept. Name the physics concept involved.

[5 marks]

(c) Referring to the graph in Figure 9.1 , explain the changes which occur in the liquidnaphthalene when it is cooled until it changes from liquid to the solid state.

[4 marks]

(d) A chef has to cook for a banquet and has to be able to prepare his food quickly, with the minimum cost yet without compromising on the quality of the food served. Using suitable physics concepts, suggest and explain the suitable designs and ways to have a pot with the following features :

(i) Safe and long lasting

(ii) portable

(iii) Consume little fuel / cooking gas

(iv) Versatile ( adaptable for various purpose : cooking, steaming and etc)

[10 marks]

10 Figure 10.1 and 10.2 show two different positions of an object in front of a concave mirror. CP is the radius of curvature of the mirror and F is its focal point.

14

Figure 9.2

ObjectObject

Image Image

F C F CO OP P


(a) What is meant by focal point ?[1 mark]

(b) Using Figure 10.1 and 10.2, compare the object distance OP and the effects on the images formed. State the relationship between the object distance OP and the size of the image, as the object is moved towards the mirror from its initial position in Figure 10.1 to its final position in figure 1.2.

[5 marks](c) Figure 10.3 shows a toy which consists of a curved mirror and a ball attached to the

mirror by a thin thread . F is the focal point of the mirror.

Figure 10.3

(i) What is the characteristics of the image formed by the mirror ?[2 marks]

(ii) Explain what happen to the image as the ball swings from its initial position toward the mirror.

[2 marks]

(d) You are given a plane mirror, a concave mirror and a convex mirror

15

F



Figure 10.4

(i) Using one of the mentioned mirror, explain how you can create an observation as shown in Figure 10.4. You may use a light ray diagram to illustrate your answer.

[4 marks]

(ii) Which of the three mirrors is the most suitable for an anti- theft mirror that is used to have a clear view of interior of a shop ? Explain your choice.

[3 marks ]

(iii) A television repairman wants to be able to see the back portion of a television eventhough he is facing the front up the television. This is to enable him to do some adjustments to the back of the television while watching the screen. Which of these mirrors is most suitable for this purpose ? Explain your answer .

[3 marks]

Section C

[ 20 marks ]

Answer any one question.


11 Figure 11.1 shows a submarine float still on the sea surface. The weight of the submarine is equal to the buoyant force acting on the submarine.

16

Candle

Image of candle


(a) What is meant by buoyant force?[1 mark]

(b) The submarine is able to submerge in the sea.Explain how a submarine on the sea surface submerges and float still on the sea surface.

[4 marks]

(c) Figure 11.2 shows a ship sails on the sea surface. The ship carries passengers and cargo.

Table 11.3 shows the specifications of four watercraft P , Q , R and S which can be used to carry passengers as well as cargo at high speed.

Watercraft P Q R S

Horizontal cross-sectional area

Front side -Broad and

pointed

Front side- Narrow and

pointed

Front side- Broad and flat

Front side- Narrow and flat

Hull material Wood Aluminium Steel Fibre glass

17

Figure 11.1

Figure 11.2


Hull ability Aerodynamic Hydrodynamic Hydrodynamic Aerodynamic

Engine fuel Petrol Diesel Petrol Diesel

Table 11.3

You are required to determine the most suitable watercraft. Study the specifications of all the four watercraft based on the following aspects.

- The horizontal cross-section

- Material used for the hull

- Hull ability

- Engine’s fuel[10 marks]

(d) A boat has safety limit M as shown on diagram below. The volume under the M level is 4 m3 . The mass of the boat is 200 kg .

Calculate

(i) the weight of the boat without load

(ii) the maximum additional mass on the boat[5 marks]

12 Encik Razak will be taking part in a four- wheel drive expedition to Taman Negara. In the expedition, he will have to drive through a hilly and unpaved area, and to cross streams.

Table 12 shows the characteristic of vehicles that can be used in the expedition.

Mass/ kgEngine

capacity(cc) /cm3

Types of engine

Diameter of tyre / mm

18

Vehicles

Characteristics

M

Figure 11.4


P 1500 2500 Petrol 500Q 1800 2000 Petrol 500R 2000 2500 Diesel 600S 1000 1500 Petrol 400T 3000 2000 Diesel 800

Table 12(a) What is meant by mass?

[1 mark](b) You are asked to investigate the characteristics of the vehicle that can be used in

the expedition.

Based on the table above;

(i) Explain the suitable characteristics of the vehicles that can be used for the expedition

(ii) Decide the most suitable vehicle to participate in the expedition and give your reasons.

[10 marks]

(c ) Adzmy drives a car on a straight road. He starts from rest and reaches a velocity of 10 ms-1 after 20 s. Then he maintain the speed for 30 s before he stop

his car in 15 s.

(i) Sketch the velocity- time graph to represent the motion of the car.[5 marks]

(ii) Based on the graph in (c),(i), calculate the distance travelled by the car.[2 marks]

(iii) What is the acceleration of the car ?[2 marks]

END OF QUESTION PAPER

19

Documents

Paper2 Final Form4