midyear form 52013

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

1.t

uva

18. Magnifying power /

2. asuv 222 Kuasa pembesaran =E

O

f

f

3.2

2

1atuts 19. fv

4. Momentum = mv 20.D

ax

5. maF 21. ItQ

6. Kinetic energy / Tenaga kinetik =2

2

1mv 22. VQE

7. Gravitational potential energy / 23. IRV

Tenaga keupayaan graviti = mgh 24. Power / Kuasa, IVP

8. Elastic potential energy / 25.P

S

P

S

N

N

V

V

Tenaga keupayaan kenyal= Fx2

126. Efficiency /

9. Power,time

energyP Kecekapan = %100

PP

SS

VI

VI

Kuasa,masa

tenagaP 27. 2mcE

10. Density / Ketumpatan,V

m 28. g = 10 m s2

11. Pressure / Tekanan, ghp 29. c = 3.0 108 m s1

12. Pressure / Tekanan,A

Fp

13. Heat / Haba, mcQ

14. Heat / Haba, mlQ

15.T

pV= constant /pemalar

16.r

in

sin

sin

17.vuf

111

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Section A

[60 marks]

Answer all question

1.

Diagram 1 shows the vernier callipers.

Diagram 1

(a) Name the physical quantity measured by the vernier callipers.......

[1 mark](b) Name the part labelled X

......

[1 mark]

(c) State the function of the X......

[1 mark]

(d) What is the accuracy for the vernier callipers.......

[1 mark]

(e) Calculate the thickness of the block in cm

[2 marks]

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2. Diagram 2 shows the displacement-time graph of a loaded spring.

Diagram 2

(a) What is meant by amplitude?..............................................................................................................................................................

[1 mark]

(b) (i) What is the amplitude of the wave?..............................................................................................................................................................

[1 mark]

(ii)if the spring is undergoing damping, what will happen to the amplitude of the oscillation?

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

[1 mark]

(c) Determine(i) The period of the wave

[1 mark]

(ii) The frequency of wave[1 mark]

(d) What is speed of the wave if its wavelength is 2 cm?[2 marks]

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3. Diagram 3 shows a water supply system.

Diagram 3

Water held in a high reservoir is fed along pipes to houses at lower levels.

(a) Why it is necessary for a water pump to be fitted to the high building...

[1 mark]

(b) (i) Calculate the pressure of the water at the point A if the height of the building is 100 m.

[2 marks]

(ii) The occupants at higher floors of a building always complain about low water pressure.Give a reason for the low water pressure.

.

[1 mark]

(c) Diagram 3 shows the pressure of water is transmitted equally in all direction.

Diagram 3

Name the physics principle in the above observation.

.

[1 mark]

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4. Diagram 4 shows a women pull a box with a force 800 N on a horizontal surface. The force acts at an

angle 37o

from horizontal. The box moves a distance 4.5 m.

[The frictional force between the box and the horizontal surface is neglected]

Diagram 4

(a) What is the meaning of force?

[1 mark]

(b) Calculate

(i) the force that caused the box moves forward.

[2 marks]

(ii) the work done by the women to move the box.

[2 marks]

(c) Explain what happens to the work done by the women when the same force is applied but the angle of

the force from horizontal is reduced?

[1 mark]

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5. Diagram 5.1 and Diagram 5.2 show two electrical circuits.

Diagram 5.1 Diagram 5.2

(a) (i) Which diagram shows a parallel circuit?.

[1 mark]

(ii) If the circuit is closed. What will happen to other bulbs in a (i) if one bulbs blows?

[1 mark]

(b) Draw electrical circuit diagram of the circuit in Diagram 5.2.

[2 marks]

(c) Diagram 5.3 shows an electrical circuit. Assume that the internal of the battery is negligible.

Diagram 5.3

(i) Calculate the effective resistance of the circuit?

[2 marks]

(ii) What is the reading of the ammeter if switch s is closed?[2 marks]

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6. Diagram 6.1 and Diagram 6.2 show a phenomenon of light occur when the light propagates between

two medium with different density. Medium B is denser than medium A.


(a) What is the name given to angle labelled r?.

[1 mark]

(b) Based on Diagram 6.1 and Diagram 6.2,(i) Compare the magnitude of angle i

[1 mark]

(ii) Compare the magnitude of angle r

[1 mark]

(iii) Relate between the angle of r and the density of an object.

[1 mark]

(iv) The refractive index, n is given as ratio of sin i to sin r, compare the refractive index, nbetween medium A and medium B.

[1 mark]

(c) Based from your answer in (b) state an appropriate relation between the refractive index, n andthe density of an object.

.

[1 mark]

(d) Name the physics law involved in the phenomenon of light as shown on the diagrams.

[1 mark]

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7. Diagram 7.1 shows a boy pushing trolley at the start of a shopping trip and Diagram 7.2 shows the

trolley at the end of the shopping trip.


(a) (i) What is the meaning of the mass?..

[1 mark]

(ii) State whether mass is scalar quantity.

[1 mark](b) Based on Diagram 7.1 and Diagram 7.2,

(i) Compare the mass of the trolley.

.....

[1 mark]

(ii) Which trolley would be more difficult to start moving?

[1 mark](iii) Which trolley would be more difficult to stop once its moving.

..

[1 mark]

(iv) Based on your answer in b(i), b(ii) and b(iii), state the relationship between mass and the

rate of change in motion.

.

[1 mark](c) Name the physics concept involved in (b).

.

[1 mark]

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

[2 marks]

(ii) the force acting on the tanker

[2 marks]

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8. Diagram 8.1 shows the heating curves for liquid M and liquid N. Both liquids have mass 200 g and

were heated with a 200 W heater for 5 minutes.

Diagram 8.1

Table gives the values of the specific heat capacity of liquid M and liquid N.

Liquid Specific heat capacity / J kg-1

oC

-1

M 1200

N 1800

Table 8

(a) What is the meaning of specific heat capacity?

..

[1 mark]

(b) Based on the heating curves in Diagram 8.1:(i) Compare the heat energy supplied to liquid M and liquid N.

[1 mark]

(ii) Compare the specific heat capacity of liquid M and liquid N.

[1 mark]

(iii)Compare the final temperature of liquid M and liquid N.

[1 mark]

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(iv)Compare the rate of increase of temperature of liquid M and liquid N

.

[1 mark]

(v) Relate the specific heat capacity of the liquid to its rate of increase in temperature.

.

[1 mark]

(c) Diagram 8.2 shows an electric kettle

Diagram 8.2

As a scientist, you are instructed to produce an ideal kettle which is suitable for the purpose of

boiling water with faster rate.

State the suitable modification and give one reason for the modification

(i) Melting point

..

Reason:

..

[2 marks]

(ii) Specific heat capacity for body

..

Reason:

..[2 marks]

(iii) Specific heat capacity for handle

..

Reason:

..

[2 marks]

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Section B

[ 20 marks]

Answer anyone question from this section.

The time suggested to answer this section is 30 minutes.

9. Diagram 9.1 and Diagram 5.2 show two identical springs supporting two babies. P and Q of mass 5 kg

and 8 kg respectively.


(a) What is the meaning of mass?

[1 mark]

(b) Observe Diagram 9.1 and Diagram 9.2,

(i) Compare the mass of the baby

(ii) Compare the extension of the spring, y.

(iii) Compare the spring constant

(iv) Relate the mass of the baby with the extension of the spring

(v) State the physics involved

[5 marks]

(c) Explain why spring on mechanical pencil use a short a thin wire of spring while the spring of

absorber on the car use thick wire and also short spring.

[4 marks]

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(d) Diagram 9.3 shows an archer getting ready to shoot an arrow towards a target board from a

far distance. When he release the arrow, he observes that the arrow falls short of the target.

Diagram 9.3

Suggest and explain how he would be able to shoot the arrow to hit the centre of the target

board, based on the following aspects:

(i) The strength of the cord

(ii) The force constant of the bow

(iii) The material used for the bow

(iv) The design of the arrow

(v) The way the arrow is aimed at the target.

[10 marks]

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10. Diagram 10.1 shows two electric circuits. Each circuit contains four identical batteries marked 1.5 V, a

bulb and an ammeter. Diagram 10.2 shows the readings of the ammeters for the two circuits.

Diagram 10.1 (a) Diagram 10.1(b)

Diagram 10.2 (a) Diagram 10.2(b)

(a) State the energy transformation that takes place in the bulb. [1 mark]

(b) Observe Diagram 10.1 and Diagram 10.2. Compare the arrangement of batteries in the circuits, thevoltage supplied and the readings of the ammeters.

State the relationship between the brightness of the bulb and

(i) the voltage supplied

(ii) the current that flows in the circuit

[5 marks]

(c) Diagram 10.3 shows the wires in a three-pin plug.

An electrician forgets to connect the earth wire as shown in Diagram 10.3. Explain why it is not safe to

use this three-pin plug. [4 marks]

(d) As an engineer you are given the task of determine the type of wire that is suitable to be used for

connecting electric devices in a house.

Explain the suitability of the following aspect of the wire.

(i) resistance of wire

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(ii) melting point of wire

(iii) density of wire

(iv) rate of rusting of wire

(v) rate of expansion of wire [10 marks]

Section C

[ 20 marks]

Answer anyone question from this section.

The time suggested to answer this section is 30 minutes.

11. Diagram 11.1 shows two boats of the same weight floating on the surface of water in the sea and in

the river.

Boat in the sea Boat in the river

Diagram 11.1

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

(ii) Explain why the boat is able to float? [1 mark]

(iii) Explain why the sinking levels of the boats are different in the river and in the sea.

[3 marks]

(b) If the volume of the boat that sinks in sea water is 250 m3

and the density of sea water is 1080 kgm-3

,

Calculate

(i) upthrust which acts on the boat. [3 marks]

(ii) the volume of water displaced when the boat is in the river.

[Density of river water = 1000 kgm-3

] [2 marks]

(c) Table 11 shows four boats P, Q, R and S with different specifications. You are required to determine

the most suitable boat suitable boat that can carry many passengers, move with high speed and safe.

Study the specification of the four boats based on based on the following aspects:

- The material used to build the body of the boat

- The volume of air space in the boat

- The existence of plimsoll line

- The size of the propeller

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Explain the suitability of each aspects and then determine the most suitable boat. Give a reason for

your choice.

[10 marks]

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Table 11

12. Diagram 12.1 shows waves moving towards a harbour.

Diagram 12.1

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

(ii) Draw the wave pattern of the waves after passing through the entrance of the harbour. [1 mark]

(b) The entrance is made wider to allow more ships to enter the harbour.

What is the effect on

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(i) the waves passing through the entrance? [2 marks]

(ii) the harbour? [1 mark]

(c) In a Youngs double slit experiment, a light of wavelength 633 nm passes through two slit which are 0.5mm apart. Vertical fringes are observed on a screen placed 4 m from the slits.

(i) Calculate the distance between two adjacent bright fringes.

(ii) What will happen to the distance between two adjacent bright fringes if a light of shorter

wavelength is used.

[5 marks]

(d) Diagram 12.2 shows a displacement-time graph for sound wave P, Q, R and S.

You are assigned to investigate the suitable wave to be used in ambulance siren. Study waves P, Q, Rand S in Diagram 12.2 and consider the following aspects.

- Wave amplitude- Wavelength- Damping effect- Frequency of wave

Explain the aspects suitability the most suitable wave to be used in an ambulance siren. Justify your

answer.

[10 marks]

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Diagram 12.2

END OF QUESTION PAPER

midyear form 52013

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