Mid Term-paper 2

7/31/2019 Mid Term-paper 2

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Fizik Nama :... Tingkatan: .....4 SETIA.....

Kertas 2

MEI 2010

2 Jam

SMK PAI CHEE (CF)

PEPERIKSAAN PERTENGAHAN TAHUN

TINGKATAN 4

FIZIKKERTAS 2

Dua jam tiga puluh minit

(Anda dinasihatkan untuk memperuntukkan masa 90 minit untuk Bahagian A,

30 minit untuk Bahagian B dan 30 minit untuk Bahagian C)

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

Untuk Kegunaan Pemeriksa

Bahagian Soalan Markah

A

1

2

3

4

5

6

7

8

B910

C

11

12

Jumlah Besar

1

1. Tulis nama dan tingkatan anda pada ruang yang disediakan.

2. Calon dibenarkan menjawab keseluruhan atau sebahagian soalan

sama ada dalam bahasa Inggeris atau bahasa Melayu.

3. Jawapan kepada Bahagian A hendaklah ditulis dalam ruang yang

disediakan dalam kertas soalan.

4. Jawapan kepada Bahagian B hendaklah ditulis dalam kertas

jawapan yang disediakan.

5. Rajah tidak dilukis mengikut skalakecualidinyatakan.

6. Markah maksimum yang diperuntukkan ditunjukkan dalam

kurungan pada hujung tiap-tiap soalan atau

7. Penggunaan kalkulator saintifik yang tidak boleh diprogramkan

adalah dibenarkan.

Kertas ini mengandungi 16 halaman bercetak


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

2

1. a =t

uv

2. v2 = u2 + 2as

3. s = ut+

2

1at2

4. Momentum = mv

5. F = ma

6. Kinetic energy = mv2

7. Gravitational potential energy = mgh

8. Elastic potential energy =2

1Fx

9. Power,P= energytime

10. =V

m

11. Pressure, p=hg

12. Pressure,p=A

F

13. Heat, Q = mc

14. Heat, Q = m

15. P1V1 = P2V2

16. V1 = V2T1 T2

17. P1 = P2T1 T2

18.T

PV= constant

19. n =r

i

sin

sin

20. n = real depth

apparent depth

21.

vuf

111+=

22. Linear magnification, m = v

u

23. P = 1/ f

24. v = f

25. =D

ax

26. Q =It

27. E = VQ

28. V = IR

29. E = V + Ir

30. Power,P = VI

31.P

S

P

S

V

V

N

N

=

32. Efficiency =PP

SS

VI

VIx 100%

33. eV = mv2

34. E = mc2

35. g= 10 ms-2


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SECTION A

(60 marks)

Answerall questions in this section.

The time suggested to answer this section is 90 minutes.

1. Diagram 1.1 shows a liquid-in-glass thermometer.

Diagram 1.1

(a) (i) Name the liquid P used in the thermometer.

(1 mark)

(ii) State the physical change in the liquid when the temperature increases.

..(1 mark)

(b) Diagram 1.2 shows two types of thermometers.

Diagram 1.2

(i) Which thermometer is more sensitive?

.(1 mark)

(ii) State one reason for your answer in 1 (b) (i).

...........

.(1 mark)

33


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2. Diagram 2.1 shows the initial reading of a stopwatch at the beginning of an experiment. The stopwatch was

used to measure the time for 20 complete oscillations made by a simple pendulum of length, l.

Diagram 2.2 shows the reading of the stopwatch at the end of the experiment.

(a) (i) State the type of error shown in Diagram 2.1.

... (1 mark)

(ii) What is the actual time taken for the pendulum to complete 20 oscillations?

... (1 mark)

(b) (i) Find the period ofone complete oscillation, T, for this pendulum.

(1 mark)

(ii) The relationship between the length, l, and the period, T, of a simple pendulum is given by the equation,

2

24T

gl

=

.

Using the value ofTobtained in (b)(i), calculate the length, l, of the pendulum.

[Given that = 3.142 andg= 10 m s-2]

(2 marks)

3. Diagram 3 shows an object moves along a straight line. Diagram 3 is a graph which shows how the

displacement of the object varies with time.

4

DIAGRAM 2.2DIAGRAM 2.1D


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(a) What is the displacement of the object after 2 s?

... (1 mark)(b) Which section of the graph indicates that the object is not moving?

... (1 mark)

(c) How long does it take before the object started on its return journey to the starting point?

... (1 mark)

(d) What is the velocity of the object at stage P?

(2 marks)

(e) What is the velocity of the object on its return journey during stage R?

(2 marks)

(f) What is the displacement of the object at the end of its journey?

5

Displacement, (m)D

Times, (s)

1

3

2

-1

0

-2

64 5321

RQP

DIAGRAM 3


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(1 mark)

4. (a)

Diagram 4 (a) shows three strips of ticker tape from a 50 Hz ticker-timer.

(i) Which strip correctly shows a ten-tick strip?

_______________________________________________________________________ (1 mark)

(ii) Find the average velocity of (a) (i).

(1 mark)

(b)

Diagram 4 (b) shows a ticker chart for a trolley moving down an inclined runway.

(i) The chart shows a constant acceleration. Explain how you would come to this conclusion.

6

P

Q

R

DIAGRAM 4 (a)

0

4

6

8

2

10

0

Velocity (cm / 5ticks)

Time (s)

DIAGRAM 4 (b)


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_______________________________________________________________________ (1 mark)

(ii) Find the acceleration of the trolley from the chart.

(2 marks)

5. Diagram 5 shows a car and a lorry which has different mass approaching a zebra crossing with same velocity

15 m s-1.

When the driver in the vehicles saw Jenny walking across the zebra crossing, they applied the brake at the

same time until the vehicles came to a complete stop.

(a) What is meant by mass?

... (1 mark)

(b) (i) Between the car and the lorry in Diagram 5, which first came to a complete stop?

......... (1 mark)

(ii) Give one reason for your answer in (b) (i).

... (1 mark)

(c) If the lorry had traveled a distance of 375 m before it came to a stop, calculate the deceleration when

the brake was applied until it stops.

(2 marks)

6.

7

Jenny

DIAGRAM 5


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Diagram 6 shows that a boy (60 kg) jumps down from a wall. He lands on the floor with a velocity of 5 ms -1.

He bends his knees which takes 1.2 s to stop his motion. Take the direction downward as positive.

(a) Find the change in momentum on loading the floor.

(1 mark)

(b) (i) Find the force acting on Man Heng.

(2 marks)

(ii) Explain why the answer for b (i) is negative.

.. (1 mark)

(iii) If he forgets to bend his knees on landing, the time taken to stop his motion 0.05 s. Find the force on

Man Hengs legs.

(2 marks)

(c) Draw a conclusion from (b) on how the impulsive force can be reduced.

(1 mark)

(d) Give an example other than the situation above to justify your reasoning in (c)

8

DIAGRAM 6


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(2 marks)

8.

Diagram 8 (a) shows a worker pushing a trolley with five cartons of mineral water. The worker applies a force

of 200 N at an angle of 300 to the vertical. The total weight of the trolley and the five cartons of mineral water

is 300 N. the trolley moves forward at constant velocity.

(a) Resolve the force of 200 N into its vertical and horizontal components.

(i) Vertical component

(2 marks)

(ii) Horizontal component

(2 marks)

(b) Determine

(i) the friction against the trolley,

(1 mark)

(ii) the normal reaction on the wheel of the trolley.

10

DIAGRAM 8 (a)


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(1 mark)

(c)

The worker then lifts the cartons of mineral water up, one by one, to a stage by a staircase consisting of 10

steps, each with a height of 15 cm as shown in Diagram 8 (b). If the total work done is 420 J, calculate

(i) the weight of a carton of mineral water,

(2 marks)

(ii) the mass of the trolley. (g = 10 N kg-1)

(2 marks)

(d) if the worker places the five cartons of mineral water as shown in Diagram 8 (c), will the work done be

less, equal or more than 420 J?

Explain your answer.

...

(2 marks)

9.

11

Children A

Children B

floor

20 kg

Loaded bag

110o

60 N

80 N

DIAGRAM 8 (c)DIAGRAM 8 (b)


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Two children are pulling a loaded bag of mass 20 kg on a floor. The horizontal forces applied are 60 N and 80

N with an angle of 110o between them as shown in diagram 9.

(a) Using a suitable scale, draw an appropriate diagram to determine the resultant of these two forces.

The resultant force is _________ N in the direction ______________________________________ from

80 N. (3marks)

(b) Sketch a diagram to show how the 60 N and 80 N force combine to produce a force of 100 N.

(1 mark)

(c) If the frictional force acting o the object is 79 N, what is the acceleration of the object?

(2 marks)

SECTION B

(40 marks)

Answer any two questions from this section.

The time suggested to answer this section is 60 minutes.

12

DIAGRAM 9


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10. Diagram 10 shows two eggs of the same mass released from the same height. One egg falls on a concrete floor

and breaks while the other one falls on a thick folder towel and remains unbroken.

(a) (i) Define momentum. (1 mark)

(ii) Relate the outcome for each material to the change in momentum. Then, deduce a relevant physics

concept. (5 mark)

(b) Explain the changes in energy of the unbroken egg from the moment it is release until it touches the

towel. (4 marks)

(c) A weather satellite, after its launch, is return to the earth. During the return journey, it travels in the

earths atmosphere at high velocity. Using the appropriate physical concepts, suggest and explain

suitable designs or ways to assure its safe return. In your explanation, emphasise the following aspects:

(i) Material for the structure of the satellite

(ii) The extreme heat

(iii) The possibility of breaking up upon landing. (10 marks)

11.Diagram 11 shows two situations of a driver and the decorative accessory that are hung to the rear-view

mirror. Diagram 11 (a) shows when his car is bumped at the back by another car and Diagram 11 (b) shows

when his car stops suddenly after collision. The car in the two situation experiences great impulsive force.

(a) (i) What is meant by an impulsive force? (1 mark)

(ii) Observe the two situations in Diagram 11 carefully. Explain what happens to the driver and the

decorative accessory that are hung to the rear-view mirror when the car is bumped at the back by another

car and when the car stops suddenly after collision. Give a conclusion of the situations that are related to a

physics concept. (5 marks)

13

DIAGRAM 10

DIAGRAM 11


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(b) Explain why the seatbelt and the headrest are useful safety device in a car. (4 marks)

(c) Suppose you are an engineer working in a car industry. Explain how you could design a saloon car which

is safe to driver on the road. You should consider all the safety measures that are related to the concept of

physics. (10 marks)

12.

Diagram 12

Mr. Raju departs for Kuala Lumpur from Ipoh to attend a meeting. He starts his journey at 5.00 p.m. and stops

at Kampar to rest and refresh. He continues his journey at 9.00 p.m. He then rest in a hotel and attends the

meeting the next morning. After the meeting, he goes straight back to Ipoh.

(a) (i) What is the difference between distance and displacement? Calculate the total distance and the total

displacement. (4 marks)

(ii) Calculate the mean speed of the journey.

(2 marks)

(b) Initially, Mr. Raju drives along a level road. He then drives up the slope of the road.(i) With labeled diagrams, explain the force acting on the car on the level road and up the slope.

(ii) What is the relationship between the forces if the car is moving with constant velocity?

(iii) Why does Mr. Raju need to press the petrol pedal harder in order to maintain constant velocity?

(9 marks)

(c) Along the road. Mr. Raju overtakes many lorries which are moving slowly. Why are the lorries moving

slowly? (5 marks)

14

Time PlaceDistance

from Ipoh

5.00 -.m. Ipoh 0 km

7.30 p.m. Kampar 40 km

9.00 p.m. Kampar 40 km

1.00 a.m. Kuala Lumpur 220 km

10.00 a.m. Kuala Lumpur 220 km

1.00 p.m. Ipoh 0 km


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13.

A factory which produces photocopy paper claims that their product is 80 GSM (gram per square metre).

However, the thickness of a sheet of paper is not mentioned. You are given a new pack of the photocopy

paper. You are asked by your physics teacher to carry out two task:

(a) (i) To determine whether the paper is really 80 GSM.

(ii) To determine the thickness of a sheet of paper, using a metre rule.

Explain and show the necessary calculations. (5 marks)

(b) What is meant by

(i) the accuracy of a measurement,

(ii) the consistency of measuring instrument and

(iii) thesensitivity of a measuring instrument? (3 marks)

(c) Diagram 13 shows the results of a target shooting completion involving three competitors.

Which of the results can be described as consistent but not accurate? Explain your answer.

(2 marks)

(d)

The formula above shows the relationship between , the coefficient if viscosity of a liquid and other

quantities.

(i) Classify the quantities in the above formula (excluding ) into scalar and vector quantities.

(2 marks)

(ii) Express the unit for in derived units and base units.

15

GLORY PHOTOCOPY PAPER80 GSM

480 SHEETS

DIAGRAM 13


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(3 marks)

(e) Diagram 13 (a), 13 (b), 13 (c) and 13 (d) show the four graphs drawn by four students who use the same

set of readings to plot a graph showing the relationship between quantities p and q. the students are

required to determine the value of the gradient.

As a teacher, you are asked to select the best of the four graphs.

Justify you choice. (5 marks)

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DIAGRAM 13

~ KERTAS SOALAN TAMAT ~


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1. trial sbp 07 no 12. Trial kedah no 2

3. M

4. M

5. Trial trg no 2

6. Oxford pg 21

7. Total ref pg 121

8. Oxford pg 20 n 21

9. Oxford pg 22

10. Success pg 163

11. Focus excel pg 104

12. Total pg 123

13. Oxford pg 7 n 8

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Mid Term-paper 2

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