4 Exp Sc(phy) P2 Prelim 2009
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Class
Index Number
Name
1
BEDOK SOUTH SECONDARY SCHOOL PRELIMINARY EXAMINATION 2009 Science (Physics) Paper 2 5116/2 Level: Secondary 4 EXP/ 5 NA
Duration: 1 hr 15 min
Date: 13th August 2009
Setter: Mr Benjamin Chan
LEVEL READ THESE INSTRUCTIONS FIRST Write your class, index number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs, tables or rough working. Do not use paper clips, highlighters, glue or correction fluid. Section A (45 marks) Answer all questions. Write your answer in the spaces provided on the question paper. Section B (20 marks) Answer any two questions. Write your answers on the writing paper provided. Write the question number of the questions you have chosen in the box below. At the end of the examination, fasten all your working securely together. The number of marks is given in brackets [ ] at the end of each question or part question.
For Examiner’s Use Section A Section B Q Q TOTAL
This document consists of 11 printed pages
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
2 Section A Answer all the questions in this section. Write your answers in the space provided on the question paper.
1 A stone is thrown upwards into the air. Fig. 1 below shows the change in velocity of the stone over time. Velocity/ ms-1 20 15 10 5 0
1
2
3
4
Time/s
-5 -10 -15 -20
Fig. 1 (a) State when the ball reaches its maximum height.
[1]
……………………………………………………………………………………………………………………………………………
(b) Calculate the total distance travelled by the ball from t = 0 to t = 4 s.
[2]
(c) Explain what is happening to the ball from t = 2 to t = 4 s.
[2]
…………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
3 2 The figure below shows a car of mass 1000 kg moving along a section of track. Its engine produces a thrust of 15 000 N. The air resistance acting on the car is 800 N.
15000 N 800 N Fig. 2 (a) Find the acceleration of the car.
[3]
(b) If air resistance increases to 1000 N, would you expect the acceleration to be greater or lower than what you found in (a) ? Explain your answer. [2] ……………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………………………….
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
4 3 A ball of mass 0.8 kg is rolled up a frictionless slope with an initial speed of 8 m/s. The ball comes to a stop after 5 s. Assuming g = 10 N/kg, calculate (a) the initial kinetic energy of the ball
[2]
(b) the maximum height the ball can reach on the slope
[2]
(c) the acceleration of the ball
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
[2]
5 4 Fig. 4 below shows a metre rule of mass 150 g that is pivoted at its midpoint. A 200 g mass is placed at the 20 cm mark while 50 g and 100 g masses are placed at the 70 cm and 90 cm marks. A force F is exerted at the 40 cm mark. F 50 cm
20 cm
70 cm
90 cm
40 cm 100 g
50 100 g
100 g
Fig 4 (a) Calculate the force F needed to keep the beam in equilibrium.
[3]
(b) If a spring balance(calibrated in newtons) is now used to support the metre rule (at the midpoint) in place of the pivot, what would be the reading on the spring balance? [3]
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
6 5 Fig. 5 shows the refraction of a ray of green light at the boundary between glass and air. Medium A Medium B
Fig 5 (a) Complete the diagram by drawing and labelling the angles of incidence (i) and refraction (r). [1] (b) State which medium, A or B, represents air. Explain your answer.
[2]
……………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………………………….
(c) State the speed of green light in a vacuum.
[1]
…………………………………………………………………………………………………………………………………………….
(d) The refractive index of glass for green light is 1.51. Find the speed of green light in glass. [2]
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
7 6 (a) Define the frequency of a wave. State its SI Unit.
[2]
……………………………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………………………….
(b) Fig. 6 shows a soundwave as it moves through air.
Region A
Fig 6 (i)
Identify the Region A.
[1]
…………………………………………………………………………………………………………………………………..
(ii)
Indicate, on the diagram, the region that comprises one wavelength. [1]
(iii) If the period of the wave is 2.5 s, find the its wavelength. Assume speed of sound = 330 m/s
[3]
7 Two perspex rods repel each other after they have been rubbed with a woollen duster. (a) Suggest why the perspex rods repel each other.
[2]
……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….
………………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………….
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
8 (b) A polythene rod is rubbed with a woollen duster. This polythene rod then attracts the perspex rods in (a). Suggest why the polythene rod attracts the perspex rods. [2] ……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….
8 Fig 8 shows a circuit diagram showing 3 identical flourescent lamps being connected to the mains supply. The lamps are rated at 240 V, 60 W each. Wire A
Wire B 240 V
Fig 8
(a) Find the total current flowing through the circuit.
[3]
(b) Suggest a suitable rating for the fuse.
[1]
……………………………………………………………………………………………………………………………………………….
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
9 (c) State, giving your reasons, which wire is the neutral wire.
[2]
………………………………………………………………………………………………………………………………………………. ………………………………………………………………………………………………………………………………………………. ………………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………….
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
10 Section B Choose any TWO questions. Write your answer on the writing papers provided.
9
10
(a)
State 2 differences between boiling and evaporation.
[2]
(b)
(i)
Peter wishes to construct his own electric water heater and places the heating element near the top of the heater tank. State, giving your reasons, if he has made the right decision. [4]
(ii)
Explain why a shiny pot loses heat energy more quickly when it is dirty. [1]
(c)
Liquids, when freezing, remain at a constant temperature. Explain why this is so. [3]
(a)
Sketch a graph showing the voltage/current (V/I) relationship between voltage and current in a metallic conductor and explain its shape. [4]
(b)
Wire A has a resistance of 4 Ω has a cross-sectional area A and a length of l. Calculate the resistance of the wire if its
(c)
(i) length is doubled
[1]
(ii) area is doubled
[1]
3 different resistors, of resistance 8 Ω, 10 Ω and 12 Ω are connected as shown in the circuit below, Fig 10.1. 10 V
10 Ω 8Ω 12 Ω
(d)
Fig 10.1 State which resistor will have the highest rate of heat dissipation. Explain your answer. [3] You are provided with three 5 Ω resistors. Draw a circuit diagram showing how these resistors can be arranged to yield a combined resistance of 7.5 Ω. [1]
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
11 11
(a)
Fig. 11.1 shows a solenoid connected to a dry cell. A
B
Cardboard Roll
Fig 11.1 (i) (ii) (b)
Identify the magnetic poles at A and B. [1] Suggest two ways to increase the strength of the magnetic field of the solenoid. [2]
Fig 11.2 shows a magnetic relay system used to operate high voltage machinery.
Fig 11.2 Describe how the magnetic relay works. (c)
[3]
Fig. 11.3 shows a current carrying conductor placed in between the North and South poles of a magnet.
N
S
Fig 11.3 (i) (ii)
Copy the diagram and indicate the direction in which the conductor moves. [1] Explain, with the aid of diagrams, how the current carrying conductor experiences a force in the direction shown in (i). [3] End of Paper 2
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
Index Number
Name
1
BEDOK SOUTH SECONDARY SCHOOL PRELIMINARY EXAMINATION 2009 Science (Physics) Paper 2 5116/2 Level: Secondary 4 EXP/ 5 NA
Duration: 1 hr 15 min
Date: 13th August 2009
Setter: Mr Benjamin Chan
LEVEL READ THESE INSTRUCTIONS FIRST Write your class, index number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs, tables or rough working. Do not use paper clips, highlighters, glue or correction fluid. Section A (45 marks) Answer all questions. Write your answer in the spaces provided on the question paper. Section B (20 marks) Answer any two questions. Write your answers on the writing paper provided. Write the question number of the questions you have chosen in the box below. At the end of the examination, fasten all your working securely together. The number of marks is given in brackets [ ] at the end of each question or part question.
For Examiner’s Use Section A Section B Q Q TOTAL
This document consists of 11 printed pages
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
2 Section A Answer all the questions in this section. Write your answers in the space provided on the question paper.
1 A stone is thrown upwards into the air. Fig. 1 below shows the change in velocity of the stone over time. Velocity/ ms-1 20 15 10 5 0
1
2
3
4
Time/s
-5 -10 -15 -20
Fig. 1 (a) State when the ball reaches its maximum height.
[1]
……………………………………………………………………………………………………………………………………………
(b) Calculate the total distance travelled by the ball from t = 0 to t = 4 s.
[2]
(c) Explain what is happening to the ball from t = 2 to t = 4 s.
[2]
…………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
3 2 The figure below shows a car of mass 1000 kg moving along a section of track. Its engine produces a thrust of 15 000 N. The air resistance acting on the car is 800 N.
15000 N 800 N Fig. 2 (a) Find the acceleration of the car.
[3]
(b) If air resistance increases to 1000 N, would you expect the acceleration to be greater or lower than what you found in (a) ? Explain your answer. [2] ……………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………………………….
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
4 3 A ball of mass 0.8 kg is rolled up a frictionless slope with an initial speed of 8 m/s. The ball comes to a stop after 5 s. Assuming g = 10 N/kg, calculate (a) the initial kinetic energy of the ball
[2]
(b) the maximum height the ball can reach on the slope
[2]
(c) the acceleration of the ball
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
[2]
5 4 Fig. 4 below shows a metre rule of mass 150 g that is pivoted at its midpoint. A 200 g mass is placed at the 20 cm mark while 50 g and 100 g masses are placed at the 70 cm and 90 cm marks. A force F is exerted at the 40 cm mark. F 50 cm
20 cm
70 cm
90 cm
40 cm 100 g
50 100 g
100 g
Fig 4 (a) Calculate the force F needed to keep the beam in equilibrium.
[3]
(b) If a spring balance(calibrated in newtons) is now used to support the metre rule (at the midpoint) in place of the pivot, what would be the reading on the spring balance? [3]
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
6 5 Fig. 5 shows the refraction of a ray of green light at the boundary between glass and air. Medium A Medium B
Fig 5 (a) Complete the diagram by drawing and labelling the angles of incidence (i) and refraction (r). [1] (b) State which medium, A or B, represents air. Explain your answer.
[2]
……………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………………………….
(c) State the speed of green light in a vacuum.
[1]
…………………………………………………………………………………………………………………………………………….
(d) The refractive index of glass for green light is 1.51. Find the speed of green light in glass. [2]
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
7 6 (a) Define the frequency of a wave. State its SI Unit.
[2]
……………………………………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………………………………….
(b) Fig. 6 shows a soundwave as it moves through air.
Region A
Fig 6 (i)
Identify the Region A.
[1]
…………………………………………………………………………………………………………………………………..
(ii)
Indicate, on the diagram, the region that comprises one wavelength. [1]
(iii) If the period of the wave is 2.5 s, find the its wavelength. Assume speed of sound = 330 m/s
[3]
7 Two perspex rods repel each other after they have been rubbed with a woollen duster. (a) Suggest why the perspex rods repel each other.
[2]
……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….
………………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………….
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
8 (b) A polythene rod is rubbed with a woollen duster. This polythene rod then attracts the perspex rods in (a). Suggest why the polythene rod attracts the perspex rods. [2] ……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….
8 Fig 8 shows a circuit diagram showing 3 identical flourescent lamps being connected to the mains supply. The lamps are rated at 240 V, 60 W each. Wire A
Wire B 240 V
Fig 8
(a) Find the total current flowing through the circuit.
[3]
(b) Suggest a suitable rating for the fuse.
[1]
……………………………………………………………………………………………………………………………………………….
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
9 (c) State, giving your reasons, which wire is the neutral wire.
[2]
………………………………………………………………………………………………………………………………………………. ………………………………………………………………………………………………………………………………………………. ………………………………………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………………………………………….
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
10 Section B Choose any TWO questions. Write your answer on the writing papers provided.
9
10
(a)
State 2 differences between boiling and evaporation.
[2]
(b)
(i)
Peter wishes to construct his own electric water heater and places the heating element near the top of the heater tank. State, giving your reasons, if he has made the right decision. [4]
(ii)
Explain why a shiny pot loses heat energy more quickly when it is dirty. [1]
(c)
Liquids, when freezing, remain at a constant temperature. Explain why this is so. [3]
(a)
Sketch a graph showing the voltage/current (V/I) relationship between voltage and current in a metallic conductor and explain its shape. [4]
(b)
Wire A has a resistance of 4 Ω has a cross-sectional area A and a length of l. Calculate the resistance of the wire if its
(c)
(i) length is doubled
[1]
(ii) area is doubled
[1]
3 different resistors, of resistance 8 Ω, 10 Ω and 12 Ω are connected as shown in the circuit below, Fig 10.1. 10 V
10 Ω 8Ω 12 Ω
(d)
Fig 10.1 State which resistor will have the highest rate of heat dissipation. Explain your answer. [3] You are provided with three 5 Ω resistors. Draw a circuit diagram showing how these resistors can be arranged to yield a combined resistance of 7.5 Ω. [1]
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
11 11
(a)
Fig. 11.1 shows a solenoid connected to a dry cell. A
B
Cardboard Roll
Fig 11.1 (i) (ii) (b)
Identify the magnetic poles at A and B. [1] Suggest two ways to increase the strength of the magnetic field of the solenoid. [2]
Fig 11.2 shows a magnetic relay system used to operate high voltage machinery.
Fig 11.2 Describe how the magnetic relay works. (c)
[3]
Fig. 11.3 shows a current carrying conductor placed in between the North and South poles of a magnet.
N
S
Fig 11.3 (i) (ii)
Copy the diagram and indicate the direction in which the conductor moves. [1] Explain, with the aid of diagrams, how the current carrying conductor experiences a force in the direction shown in (i). [3] End of Paper 2
BDS Preliminary Examination 2009 4Exp Sc(Phy) P2
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