Fizik Kertas 1 MEI20071 Jam

SEKTOR SEKOLAH BERASRAMA PENUH

BAHAGIAN SEKOLAHKEMENTERIAN PELAJARAN MALAYSIA

PEPERIKSAAN PERTENGAHAN TAHUNTINGKATAN 4 TAHUN 2007

FIZIK

KERTAS 1

Satu Jam

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU.

1. Kertas soalan ini mengandungi 40 soalan.2. Jawab semua soalan.3. Jawab dengan menghitamkan ruangan yang betul pada kertas jawapan.4. Gambar rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali

dinyatakan.5. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogram. 6. Satu senarai rumus disediakan di halaman 2.

Kertas soalan ini mengandungi 19 halaman bercetak

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

1. a =

2. v2 = u2 + 2as

3. s = ut + at2

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

2

Each question is followed by three, four or five options. Choose the best option for each

question then blacken the correct space on the answer sheet.

1. Which physical quantity has the correct S.I unit?

Physical quantity S.I Unit

A Mass Newton

B Length Kilometer

C Time second

2. Which of the following quantities below is a base quantity?

A MomentumB LengthC VelocityD Force

3. The graph in Diagram 1 below shows the relationship between v and t .

The relationship between v and t is represented by the equation

A v = + p

B v = + q

C v = - + p

D v = - + q

4. Ali competed in a 400 m race. Diagram 2(a) shows the reading at the start of the race.

3

DIAGRAM 1

Diagram 2(b) shows the result at the end of the race.

How long did he take to complete the race?

A 45.7 s B 46.0 s C 46.5 s D 47.0 s

5. Diagram 3 (a) shows the reading on a pair of vernier callipers when its jaws are closed with nothing in between them. Diagram 3(b) shows the reading when it is used to measure the thickness of a piece of wood.

What is the actual thicknesss of the wood?

A 4.28 cm B 4.31 cm C 4.48 cm D 4.51 cm E 4.54 cm

4

(a) (b)

0 5 10

0 cm 1 21

0 5 10

4 5 6

(a) (b)

DIAGRAM 2

DIAGRAM 3

6. Diagram 4 shows a target board used to represent consistency and accuracy. The centre of the board represents the real value of a physical quantity and the dots represent measured values.

Which of the following best describe the measurement ?

A. Consistent and accurateB. Consistent but not accurateC. Not consistent but accurate

D. Not consistent and not accurate

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

Thickness of a wire External diameter of a beaker

A Vernier callipers Metre ruleB Micrometer screw gauge Vernier callipersC Micrometer screw gauge Metre ruleD Vernier callipers Micrometer screw gauge

8. Which of the following units is equivalent to Ns?

A ms-1

B kgms-1

C kgms-2

D Js-1

9. Which of the following has the largest value?

A 2 pm B 2 nm C 2 km D 2 Gm E 2 mm

5

DIAGRAM 4

10. Vector quantities are quantities that have

A direction onlyB magnitude onlyC magnitude and direction.

11. Density of lead is 11.4 g cm-3. What is the density of lead in kg m-3?

A 1.14 x 10-6 B 1.14 x 10-4 C 1.14 x 10 D 1.14 x 103 E 1.14 x 104

12. The ability of an instrument to detect a small change in the quantity to be measured is

called

A accuracy

B precision

C sensitivity

D 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 the length of the wooden runway.

B acceleration

C mass

D time

6

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

A Voltage,V 0 5 10 15 20

Current,I 0 1.7 2.5 3.4 4.2

B Time,t /s 2 4 6 8 10

Density, / kgm-3 2000 5000 8000 11000 14000

C Period,T/ s 10.5 15.3 19.8 27.9 36.0

Distance,d /m 2.5 3.3 4.6 5.8 6.9

D Object distance,u / cm 5.1 8.7 11.6 16.5 18.6

Image distance,v / cm 2.3 5 6.9 9 11.6

15. Describe the motion of the trolley that produced the ticker tape recorded on Diagram 5.

A The trolley travels on constant velocity.B The trolley travels on increasing velocityC The trolley travels on decreasing velocity

7

▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪

DIAGRAM 5Direction of motion

16. Diagram 6 shows a part of ticker tape for a toy car moving with constant acceleration.

What is the length of X?

A. 2.4 cmB. 2.8 cmC. 3.0 cmD. 14.0 cm

17. 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 7. The distance the car will travel before it comes to a stop will be

A 2.5 mB 25 mC 50 mD 100 m

8

▪ ▪ ▪ ▪ ▪ ▪

2.0 2.2 x cm cm

DIAGRAM 6

DIAGRAM 7

18. Diagram 8 shows a velocity – time graph.

Velocity / m s-1

Time / s

The gradient of the graph represents A work done B energy C displacement

D acceleration

19. Table 1 gives the information about three cars.

Car Mass/kg Velocity/ms-1

K 1000 8L 1600 7M 2000 5

Table 1

Which of the following statement is true?

A K has the largest inertiaB L has the largest momentum

C M has the largest kinetic energy

9

0

DIAGRAM 8

20. The acceleration-time graph below shows the movement of an object.

Which velocity-time graph represents the movement of the object?

A. C.

B. D.

10

Acceleration

Time

Velocity

Time

Velocity

Time

Velocity

Time

Velocity

Time

DIAGRAM 9

21. The graph represents the relationship between the displacement, s and the time ,t of an object .

What is the displacement of the object at t = 5 s?

A 2.5 m B 10.0 mC 10.5 mD 12.5 m

22. 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.

B. D.

11

E

h

E

h

E

h

E

h

Time, t / s

Displacement, s / m

DIAGRAM 10

23.

Diagram 11 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 VelocityB AccelerationC MomentumD Kinetic energy

24. “ An object at rest tends to remain at rest . An object in motion tends to remain in motion. ”

The above statements are explained by the concept of

A vectorsB forceC inertia

D density

25.

Diagram 12 shows a coconut falling from a tree. What is the physical quantity that is constant when the coconut falls?

A VelocityB MomentumC Acceleration

12

DIAGRAM 11

DIAGRAM 12

D Kinetic Energy26. 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

B

C

D

27. 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 5 NsB 10 NsC 15 NsD 5000 Ns

13

70 N 80 N

30 N 90 N

50 N 90 N

80 N 30 N

DIAGRAM 13

E 15000 Ns28. Diagram 14 shows three weights suspended from two smooth pulleys K and L. If the system is in a state of equilibrium, what is the value of W ?

Diagram 14

A 3 NB 6 NC 9ND 12 NE 18 N

29. The following materials can reduce the impulsive force except

A air bag of a carB polystyrene packingC mattress for a high jumperD pestle and mortar

14

30. Diagram 15 shows a cart being pulled by a force, F which makes an angle, θ with the horizontal surface.

θ

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

A F sin θ + GB F sin θ – GC F cos θ – GD F cos θ + G

31. A force of 80 N pulls a load of 5 kg through a smooth pulley as shown in Diagram 16.

What is the acceleration of the load ?

A 2.0 ms-2

B 5.0 ms-2

15

Force, F

Friction force, G

bricks

Diagram 15

Diagram 16

60 N

4 kg

C 10.0 ms-2

D 25.0 ms-2

32. The expression above is the definition of

A momentumB workC power

D distance

33. Diagram 17 shows the path of a golf ball after being hit at P.

The kinetic of the ball is maximum at

A PB QC RD S

Diagram 18

34. Diagram 18 shows a car moving along a straight road. The total energy input from the petrol is 80 kJ. During the journey the car has wasted about 50 000J of energy.

What is the efficiency of the car?

A 25.0% B 37.5%

16

P

Q

R

S

Force x Displacement

DIAGRAM 17

C 45.0% D 62.5%

35. A boy of mass 50 kg stands in a lift. His weight reaches 500 N when ……. (given g = 10 N kg-1 )

A the lift moves upwards with a constant velocity.B the lift moves downwards with a constant acceleration.C the lifts fall freely.

36. Diagram 19 shows a load hanging on a spring balance in a stationary lift. The reading of the spring balance is 40 N.

What is the reading of the spring balance when the lift moves up with an acceleration of 3 ms-2?

A 28 NB 36 NC 48 ND 52 N

17

DIAGRAM 19

3 ms-2

37. A rock on the Moon is brought to the Earth where the gravitational field is stronger. On the Earth, the rock will have the same

A inertia and weightB mass and weightC weight and accelerationD inertia and mass

38. Diagram 20 shows the applied force, F against extension of a spring, x.

What is the work done in stretching the spring with the extension of 4.0cm?

A 1.0 JB 2.0 JC 12.5 JD 100.0 JE 200.0 J

18

DIAGRAM 20

39. 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 21.

Which part of the graph obeys Hooke’s Law?

A OP

B PQ

C QR

40. Diagram 22 shows three spring systems P, Q and R made up of identical springs.

Which two systems have the same total extension?

A P and QB Q and RC P and R

END OF QUESTION PAPER

19

DIAGRAM 21

DIAGRAM 22