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Candidate Name _______________________________________

FUHUA SECONDARY SCHOOL

Secondary Four Express/ Five Normal Academic

Preliminary Examination 2009Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua SecondaryFuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua SecondaryFuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary

Science (PHYSICS) 5116/2PAPER 2

Additional materials:Answer paperProtractor

DATE 17 September 2009

TIME 0750 h - 0905 h

DURATION 1 hour 15 minutes

INSTRUCTIONS TO CANDIDATES

Write your name, class and register number in the spaces at the top of this page and on

all separate answer paper used.

Section A

Answer all questions.

Write your answers in the spaces provided on the question paper.

Section B.

Answer two questions.

Write your answers on the separate answer paper provided.

At the end of the examination, fasten all separate answer paper securely.

INFORMATION FOR CANDIDATES

Take g = 10 N/kg, unless otherwise stated.

The number of marks is given in brackets [ ] at the end of each question or part question.

PARENT'S SIGNATURE FOR EXAMINER'S USE

65

Setter Mr Sreenivasan

Class

Standard

Highest Mark: Lowest Mark: Average Mark:

This Question Paper consists of 10 printed pages.

ClassRegisterNumber

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SECTION A (45 Marks)Answer all the questions in the spaces provided

1. A block of metal of density 2700 kg/m3 and mass 10 kg weighs 16 N on the moon.

a) Calculate the gravitational field strength on the moon?

[2]b) Explain what gravitational field strength means.

_________________________________________________________________

_______________________________________________________________ [1]

c) The gravitational field strength on earth is greater than on the moon. Explain if the

object will be heavier or lighter on earth.

_________________________________________________________________

_______________________________________________________________ [1]

d) i. Calculate the volume of the block.

[1]ii. State with a reason if the density of the metal block on earth will be different

from that on the moon.

_________________________________________________________________

_______________________________________________________________ [1]

2. Fig 2.1 below shows two cars pulling a boulder of mass 1000 kg

3000 N

4000 N

50o

40o

Fig 2.1

car

car

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a) Using a scale diagram, determine the resultant force acting on the boulder.

Scale: ____________________

[4]

b) If boulder was initially at rest, with what speed will it move after 3 seconds as a

result of the resultant force you calculated in part a) above.

[2]

3. Fig 3.1 is a graph showing how the velocity of a car starting from rest and traveling for15 seconds varies with time.

Fig 3.1

01

2

3

4

5

6

7

8

9

10

11

12

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

time / s

velocity/m/s

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a) How far does the car travel as its velocity changes from

i) 0 m/s to 4 m/s?

[1]ii) 4 m/s to 8 m/s?

[1]b) Calculate the acceleration of the car.

[2]

c) What is the resultant force acting on the car if its mass is 1100 kg?

[1]4. A roller coaster is pulled up to a height of 50 m by an engine using a chain. The roller

coaster when fully loaded has a mass of 2000 kg. The roller coaster then slides down.

Roller coaster

rollercoaster slides downdistance alongtrack 70 m

50 m

25 m/s

Fig 4.1

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a) What is the potential energy gained by the roller coaster when it is at a height of50 m?

[2]

b) What is the force exerted by the engine to pull the roller coaster up the track if thedistance along the track is 70 m?

[2]

c) The roller coaster then slides down a steep track making a loud rumbling andscreeching noise. It reaches a speed of 25 m/s at the bottom of the track. Calculatethe kinetic energy of the roller coaster.

[2]

d) According to the law of conservation of energy, energy cannot be destroyed.Explain why there is a difference between the initial gravitational potential energyand the final kinetic energy of roller coaster.

________________________________________________________________ [1]

5. Electromagnetic waves have many uses. For each of the following state their use.

a) Microwave

_______________________________________________________________ [1]

b) Infrared radiation

_______________________________________________________________ [1]

c) Gamma rays

________________________________________________________________ [1]

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6. Evaporation and boiling are processes that refer to a change in state from liquid togas.

a) State two differences between the two processes

_________________________________________________________________

_______________________________________________________________ [2]

b) There is hot tea in a cup. Two methods were used to cool down the tea so it canbe drunk.

i) Method one: The hot tea was poured into a large saucer. It cooled downquickly so that it could be consumed almost immediately. Explain in terms ofevaporation how cooling takes place.

_______________________________________________________________

_______________________________________________________________

____________________________________________________________ [2]

ii) Method two: Ice cubes were put into the tea. Explain in terms of convectioncurrents how the ice floating in the tea cools it.

_______________________________________________________________

_______________________________________________________________

_____________________________________________________________ [2]

7. Figure 7. 1 below shows an object in front of a thin converging lens.

F F

Fig 7.1a) Draw rays to determine the position and height of the image. [2]

b) State with a reason if the image formed will be real.

________________________________________________________________ [1]

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8. The diagram shows a metallic sphere hanging from an insulating thread. A positivelycharged rod is brought near the metallic sphere.

a) Show the charge distribution on the sphere.Insulating thread

XMetallic sphere

Fig 8.1[1]

b) Between the charged rod and the sphere is an electric field.i) What is an electric field?

_________________________________________________________________

_______________________________________________________________ [1]

ii) Show the direction of force on a negatively charged particle at X. [1]

9. Figure 9.1 below shows four resistors in a circuit. Each resistor has a resistance of3 . A current of 3 A is flowing from the battery.

3A

Fig 9.1

a) Calculate the charge flowing through the circuit in 30 seconds.

[1]b) Calculate the combined resistance.

[2]

+

++

+

+

3

3 3

3

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c) Calculate the e.m.f of the battery if it has negligible internal resistance.

[1]

d) Calculate the current flowing through one of the 3 resistors.

[2]

SECTION B (20 MARKS)Answer any two questions on foolscap paper

10. The diagram below shows a diving board found at swimming pools. The board is

pivoted at P. It has a length of 2.4 m and weighs 300 N. A man of weight 800 N

stands at a distance of 1.9 m from the pivot as shown. A spring holds the board in

place.

0.5 m 1.9 m

spring

pivot

300 N 1.2 m 800 N

Fig 10.1

a) i. Calculate the moment due to the weight of the man and the board about P. [3]

ii. If the distance between the spring and the pivot is 0.5 m, what is the force

exerted by the spring to hold the board and the man in equilibrium? [2]

iii. Draw an arrow to show the direction of the force exerted by the spring [1]

b) A child of mass 35 kg stands on the board at a distance of 0.5 m behind the pivot,

directly above the spring.

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i. Calculate the moment due to the child [2]

ii. Explain what would happen to the force exerted by the spring and determine the

new force [2]

11. Figure 11.1 below shows a solenoid connected to a battery and switch.

Fig 11.1

a) i. A magnet was placed with its north-seeking pole near one end of the solenoid.

Describe what will happen to the magnet when the switch is closed. [2]ii. Draw the magnetic lines of force between the magnet and the solenoid. [1]

b) Figure 11.2 below shows the cross section of a drawer. A solenoid is used as part

of a device to operate a hidden lock in the drawer.

Fig 11.2

The iron bolt is held in place by the spring and moves down when any conductor is

placed on the contacts completing the electric circuit containing the solenoid.

i. Explain why the iron bolt moves down when a current flows in the solenoid. [2]

ii. Explain why the lock would still work even if the current direction in the solenoid

is reversed with the iron rod but might not when a steel rod is used. [3]

S N

Spring locks the drawer by

pulling bolt up

Screw

IronBolt

Metal contacts

Solenoid

Brass sleeve to hold iron bolt vertically

so that it can slide up and down

Drawer

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iii. If the energy in the battery is used up while the rod is in the locked position,

suggest a way to open the lock. [2]

12. Light is a transverse wave.

a) What is a transverse wave? [1]

b) A series of light wavefronts are incident on an air glass boundary as shown. The

section of the wave front in the glass travel slower compared to those in the air.

Air

Glass

Fig 12.1i. Explain the term wavefront. [1]

ii. What happens to the wavelength of the light if its frequency remains the same.[1]

iii. Measure the angle of incidence and the angle refraction. [2]

iv. Calculate the refractive index of glass. [2]

c) The glass has a light ray incident as shown below.

50o

Fig 12.2

i. Determine the critical angle from the values you calculated in part b. Copy the

semicircular glass block and complete the ray diagram on your foolscap paper. [2]

ii. State an application of the effect seen in part c) i, above for practical use. [1]