Fiz K1 T4 Smart09

Fizik Kertas 1 MEI 2009 1 Jam 15 minit

PEPERIKSAAN PERTENGAHAN TAHUN TINGKATAN 4 TAHUN 2009

FIZIK KERTAS 1 Satu Jam 15 minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU. 1. 2.

3. 4. 5. 6.

Kertas soalan ini mengandungi 50 soalan. Jawab semua soalan. Jawab dengan menghitamkan ruangan yang betul pada kertas jawapan. Gambar rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogram. Satu senarai rumus disediakan di halaman 2.

Kertas soalan ini mengandungi 21 halaman bercetak

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The following information may be useful. The symbols have their usual meaning.. v−u t

1.

a=

2.

v2 = u2 + 2as

3.

s = ut +

1 2 at 2

4. Momentum = mv 5. F = ma 6.

g = 10 m s-2

7. Kinetic Energy = 1 mv2 2 8. Potential energy = mgh

9. Elastic Potential Energy = 1 Fx 2 10. Power, P = energy time 11. Impuls = Ft

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3

Each question is followed by three or four options. Choose the best option for each question then blacken the correct space on the answer sheet. 1. Which of the following is not an area of Physics? A. B. C. D.

Geometry Wave Heat Mechanics

2. Which physical quantity has the correct S.I unit? Physical quantity A Mass B Length C Time D Temperature

S.I Unit Newton Kilometer Second Celcius

3. Which of the following quantities below is a base quantity? A B C D

Momentum Temperature Velocity Force

4. Which of the following prefixes are arranged in descending order? A. giga, mega, kilo, terra B. terra, giga, mega, kilo C. kilo, mega, giga, terra D. mega, giga, kilo, terra 5. Diagram 1 (a) shows the reading on a pair of vernier callipers when its jaws are closed with nothing in between them. Diagram 1(b) shows the reading when it is used to measure the thickness of a piece of wood. 1

0 cm

0

5

21

4

10

(a)

5

0

DIAGRAM 1

3

5

(b)

6

10

4

What is the actual thicknesss of the wood? A B C D

4.28 cm 4.34 cm 4.48 cm 4.54 cm

6. Which instruments are most suitable for the accurate measurement of the thickness of a wire and the external diameter of a beaker ?

A B C D

Thickness of a wire

External diameter of a beaker

Vernier callipers Micrometer screw gauge Micrometer screw gauge Vernier callipers

Metre rule Vernier callipers Metre rule Micrometer screw gauge

7. Which of the following units is equivalent to N? A B C D

ms-1 kgms-1 kgms-2 Js-1

8. Which of the following is correct? scalar quantity A. B. C. D.

vector quantity

force power momentum time

velocity speed mass displacement

9. Diagram 2(a) shows the reading of a mercury barometer. A little while later, the reading becomes as shown in Figure 2(b).

761

761

barometer

mercury

barometer 760

760

759

759

0

mercury

0

cm

cm 4

Diagram Figure 1a2(a) / Rajah 1a

Diagram 2(b) 1b Figure 1b / Rajah

5

Which of the following is true? Barometer reading in Figure 2(a)

Change of barometer reading

759.5 cm 759.6 cm 759.5 cm 759.6 cm

0.7 cm 0.7 cm 0.8 cm 0.8 cm

A. B. C. D.

10. Which of the following has the largest value? A B C D

5 pm 5 nm 5 km 5 Gm

11. Density of lead is 11.6 g cm-3. What is the density of lead in kg m-3? A B C D

1.16 x 10-6 1.16 x 10-4 1.16 x 104 1.16 x 103

12. The ability of an instrument to detect a small change in the quantity to be measured is called A B C D

accuracy precision sensitivity error

13. An experiment is carried out to find the relationship between mass and acceleration of a trolley on a wooden runway. The experiment is repeated by adding the number of trolleys. The responding variable in this experiment is A B C D

the length of the wooden runway. acceleration mass time

5

6

14. Which of the following is the best way to tabulate data? A

Voltage,V Current,I

0 0

5 1.7

10 2.5

15 3.4

20 4.2

B

Time,t /s Density,ρ / kgm-3

2 2000

4 5000

6 8000

8 11000

10 14000

C

Period,T/ s Distance,d /m

10.5 2.5

15.3 3.3

19.8 4.6

27.9 5.8

36.0 6.9

D

Object distance,u / cm Image distance,v / cm

5.1 2.3

8.7 5

11.6 6.9

16.5 9

18.6 11.6

15. Based on the result of the graph in Diagram 3, it can be concluded that. v (ms-1)

1/t (s-1) Diagram 3 A v is inversely proportional to 1/t B. v is directly proportional to 1/t C. v is increases linearly to 1/t D. v is decreases linearly to 1/t

16. The graph shows the relationship between v and t.

6

7

v

3

t

0

3

The relationship between v and t can be represented by the equation A B C D

V= V= V= V=

t+3 t+1 -t+3 -t+1

17. Describe the motion of the trolley that produced the ticker tape recorded on Diagram 4.

▪

▪

▪

▪

▪

Direction of motion A B C D

▪

▪

▪

DIAGRAM 4

The trolley travels on constant velocity. The trolley travels on increasing velocity The trolley travels on decreasing velocity The trolley travels on deceleration

18. Diagram 5 shows a part of ticker tape for a toy car moving with constant acceleration.

▪

▪ 2.0 cm

▪

▪

▪

2.2 cm

▪ x

DIAGRAM 5

7

8

What is the length of X? A. B. C. D.

2.4 cm 2.8 cm 3.0 cm 14.0 cm

DIAGRAM 6 19. A car moving at 20 ms-1 starts to slow down at 4 ms-2 when it comes to a junction .as shown on Diagram 6. The distance the car will travel before it comes to a stop will be A B C D

2.5 m 25 m 50 m 100 m

20. Table 7 gives the information about three cars. Car K L M

Mass/kg 1000 1600 2000

Velocity/ms-1 8 7 5

Table 7 Which of the following statement is true? A B C D

K has the largest inertia L has the largest momentum M has the largest kinetic energy K has the highest weight

21. Diagram 8 shows a velocity – time graph.

8

9

Velocity / m s-1

0

Time / s DIAGRAM 8

The gradient of the graph represents A B C D

work done energy displacement acceleration

22. Table 9 gives the information about three cars. Car K L M

Mass/kg 1000 1600 2000

Velocity/ms-1 8 7 5

Table 9 Which of the following statement is true? A B C D

K has the largest inertia L has the largest momentum M has the largest kinetic energy K has the highest weight “ An object at rest tends to remain at rest . An object in motion tends to remain in motion. ”

23.

The above statements are explained by the concept of A B C D

vectors force inertia density

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10

24. This is a velocity – time graph of an object. Choose the correct statement to describe the motion of the object. v/ms-1

t/s

A. B. C. D.

The object is at rest The object is moving with uniform velocity The object is moving with increasing velocity The object is moving with decreasing velocity

25. The graph represents the relationship between the displacement, s and the time ,t of an object . Displacement, s / m

Time, t / s DIAGRAM 10 What is the displacement of the object at t = 5 s? A 2.5 m B 10.0 m C 10.5 m D 12.5 m 26. Which of the following is not the effect of the force ?

10

11

Change the size of the object B. Change the shape of the object C. Change the direction of the object motion D. Change the mass of the object A.

27. Diagram 11 shows a boy jumps down from a tree. He bends his legs while landing on the ground without injury. Which of the following explains the situation? By bending his legs while landing on the ground ,

DIAGRAM 11 A.

he decreases the magnitude of his velocity he increase the magnitude of his acceleration he decrease the magnitude of his force he increases the magnitude of his momentum

B. C.

D.

28. A stone is dropped vertically. Which of the following graphs shows the correct relationship between gravitational potential energy , E and the height, h of the stone? A.

C.

E

E

h

h

E

E

B.

D.

h

h 11

12

DIAGRAM 12 29. Diagram 12 shows two identical trolleys joined together on a smooth horizontal surface. When the pin is hammered in, the trolleys move in opposite directions. Which of the following quantities are the same for both trolleys? A B C D

Velocity Acceleration Momentum Kinetic energy

DIAGRAM 13

30. Diagram 13 shows a coconut falling from a tree. What is the physical quantity that is constant when the coconut falls? A B C D

Velocity Momentum Acceleration Kinetic Energy

12

13

31.

DIAGRAM 14

500 g football is moving at a velocity of 10 ms-1. A player dashes forward and kicks the ball so that it moves in the opposite direction at a velocity of 20 ms-1. What is the impulse experienced by the ball? A B C D

5 Ns 10 Ns 15 Ns 5000 Ns

32. Diagrams below show the same blocks of wood on a smooth table. Four different pairs of forces are acting on the block. Which pair of the forces will give the greatest acceleration towards the block ? A 70 N

80 N

B

30 N

90 N

C

50 N

90 N

80 N

30 N

D

13

14

33.

Block

Pull, 4 N Table

Diagram 15 When the block is pulled with a force of 4 N, it is found that the block moves with constant velocity. This is because the magnitude of the frictional force is A. B. C. D.

2N 4N 6N 8N

34. Diagram 16 shows the three forces P, Q and R acting on three different objects and the acceleration produced. 4 m s–2

2 m s–2 P

2 kg

3 m s–2 Q

5 kg

R

3 kg

Diagram 16 Which of the following statements shows the forces arranged in ascending order of their magnitudes? A B C D

P, Q, R P, R, Q Q, R, P R, Q, P

35. The following materials can reduce the impulsive force except 14

15

A B C D

air bag of a car polystyrene packing mattress for a high jumper pestle and mortar

36. Diagram 17 shows a cart being pulled by a force, F which makes an angle, θ with the horizontal surface. bricks

Force, F

θ

Friction force, G Diagram 17

The friction against the motion of the box is G. What is the resultant force that causes the box to move? A B C D

F sin θ + G F sin θ – G F cos θ – G F cos θ + G

37. Diagram 18 shows a method of determining the resultant of two forces, F1 and F2 by using the parallelogram of forces. A B F1

O

F2

C

Diagram 18

15

16

Which of the followings represents the resultant force? A OA B OB C OC D AC 38. Shown below are two vectors a and b. b

a

Which of the following correctly represents the vector addition of the vectors a and b which results in the resultant vector c? B. C. D. A. b b b c

a

c

a

c

a

c

39. The gravitational potential energy of an object at a height of 1 m above the surface of the Earth is 100 J. The gravitational potential energy of the same object at a height of 1 m above the surface of the Moon is A. 100 J B. Greater than 100 J C. Less than 100 J 40. The quantity having the same unit as work is A B C D

Force Energy Impulse Momentum

41. A pebble and a piece of cotton are released at the same time in a vacuum.

16

b a

17

Vacuum

Which observation is correct ? A B C D

Both objects will float Both the objects will reach the base at the same time The pebble reaches the base earlier than the piece of cotton The piece of cotton reaches the base earlier than the pebble

42. Diagram 19 shows a lady pushing on a brick wall which does not move

DIAGRAM 19

Which of the following statements is true? A B C D

No work is done by the lady. The principle of conservation of energy is not obeyed. Action and reaction force between the lady and the wall are not the same. The brick wall does not move due to the friction between the legs and the floor.

43. Diagram 20 shows a student trying to lift a load. Calculate the work done by the

17

18

student. A B C D

0.4 J 4J 40 J 400 J

2 kg 2m

Diagram 20

44. A force of 80 N pulls a load of 5 kg through a smooth pulley as shown in Diagram 21.

80 N

5 kg What is the acceleration of the load ? A B C D

5.0 6.0 10.0 16.0

ms-2 ms-2 ms-2 ms-2 Force x Displacement

45. The expression above is the definition of A B C D

momentum work power distance

18

Diagram 21

19

46. Diagram 22 shows a box sliding down a smooth inclined plane. Box

Smooth inclined plane

DIAGRAM 22 Which graph shows the relationship between the potential energy (PE) and kinetic energy (KE) of the box as it moves down the plane?

A

0

C

B

PE

KE

0

0

D

PE

PE

KE

KE

PE

0

KE

47. A boy of mass 50 kg stands in a lift. His weight reaches 500 N when ……. A B C D

the lift moves upwards with a constant velocity. the lift moves downwards with a constant acceleration. the lift moves downward with acceleration 10 ms -2 the lifts fall freely.

48. Diagram 23 shows a load hanging on a spring balance in a stationary lift. The reading

19

20

of the spring balance is 40 N.

3 ms-2

DIAGRAM 23 What is the reading of the spring balance when the lift moves up with an acceleration of 3 ms-2? A B C D

28 N 36 N 48 N 52 N

49. A student carry out an experiment to determine the relationship between the weight of the load and the extension of the spring. The graph is as shown in Diagram 24.

DIAGRAM 24

Which part of the graph obeys Hooke’s Law?

20

21

A B C D

50 .

OP PQ QR OQ

Diagram 25 shows a cradle with spring P.

Spring P

DIAGRAM 25 Spring P can hold a maximum load of 5 kg. Which of the following ways is used so that the cradle can hold a baby of more than 5 kg. A. B. C.

D.

Change spring P with a spring of smaller diameter. Increase the length of the spring. Add another spring with the same characteristics and arrange in series Add another spring with the same characteristics and arrange in parallel. END OF QUESTION PAPER

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