NYGH 2011-S3-EOY-Phy-P1

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2011 Secondary Three PHYSICS Paper 1 Multiple Choice 45 minutes Monday 17 October 2011 0845 - 0930 Additional materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and register number on the Multiple Choice Answer Sheet provided. There are thirty questions in this paper. Answer all questions. For each question there are four possible answers, A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the answer sheet. INFORMATION FOR CANDIDATES Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The gravitational field strength near Earth’s surface, g = 10 N/kg Setters: AJL, BN, TWL This document consists of 13 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over

2011 End-of-Year Examination Secondary Three 2 Nanyang Girls’ High School AJL, BN, TWL Physics Paper / I 1 Which of the following correctly describes time, distance and displacement as vector or scalar quantities? Time Distance Displacement A scalar scalar scalar B scalar scalar vector C vector scalar vector D vector vector vector 3 It takes 42.4 s for a simple pendulum to swing from P to Q and back again to P twenty times. What is the frequency of the pendulum? A 0.024 Hz B 0.274 Hz C 0.472 Hz D 2.12 Hz 4 Which of the following best defines acceleration? A The rate of increase of speed B The rate of change of velocity C The total change in speed over time D The total change in velocity over time 2 What is the reading shown on the micrometer screw gauge below? A 7.42 mm B 7.92 mm C 8.42 mm D 10.42 mm 5 20 0 45 40 35 Q P O fixed point

2011 End-of-Year Examination Secondary Three 3 Nanyang Girls’ High School AJL, BN, TWL Physics Paper / I [Turn over 5 A body X of mass m is dropped from a height, h. At the same time, another body Y of mass 3m is dropped from a height 3h. Which one of the following statements is true? A Y will eventually overtake and pass X. B As they fall, the distance between them decreases. C As they fall, the distance between them remains constant. D As they fall, the distance between them increases. 6 The graph below shows how displacement of an object changes with time. Which section of the graph shows the object moving with decreasing velocity? A P B Q C R D S 7 A trolley is released from rest at the top of a ramp. As it moves down the ramp, it pulls a ticker-tape through a 50 Hz ticker timer. The diagram below shows the tape obtained. What is the acceleration of the trolley? A 3.8 m/s2 B 4.5 m/s2 C 5.6 m/s2 D 10 m/s2

2011 End-of-Year Examination Secondary Three 4 Nanyang Girls’ High School AJL, BN, TWL Physics Paper / I 8 A girl decides to go for a jog around home before meeting her friends at the playground. The bold line in the diagram below shows the path taken by the girl as she leaves the house and jogs towards the playground. The curved paths are arcs of two circles, of radii 200 m and 250 m, centred at O. It is known that the girl took 5.0 min to jog from her home to the playground according to the path indicated. What is her average velocity? A 1.07 m/s B 3.57 m/s C 64.0 m/s D 214 m/s

2011 End-of-Year Examination Secondary Three 5 Nanyang Girls’ High School AJL, BN, TWL Physics Paper / I [Turn over 9 Car A is at rest in front of a traffic light. As the light turns green, Car A accelerates forward. At the exact same instant, Car B overtakes Car A at the traffic light. Both cars continue to accelerate uniformly. After T seconds, Car A catches up with Car B. Which of the following graphs best describe the motion of the two cars after passing the traffic light? A B C D 10 A man standing at the edge of a cliff tosses a ball vertically upwards. The ball reaches a highest point and then falls to the bottom of the cliff. Which of the following velocity-time graphs describes the motion of the stone from the moment it leaves the man’s hand, assuming that the effects of air resistance are significant? A B C D

2011 End-of-Year Examination Secondary Three 6 Nanyang Girls’ High School AJL, BN, TWL Physics Paper / I Read the following paragraph and use the information given to answer questions 11 and 12. The Lunar Roving Vehicle (LRV) was an electric vehicle designed to give astronauts extra mobility when conducting missions on the Moon. It was made largely of aluminium, a relatively light metal, so as to reduce the overall mass of the vehicle. As a result, the LRV had a mass of 210 kg when empty. Gravitational field strength on the Moon: 2 N/kg Gravitational field strength on Earth: 10 N/kg 11 How did the mass and weight of the LRV change on the Moon as compared to when it was on Earth? Mass of the LRV Weight of the LRV A B C D Reduced Same as on Earth Reduced Same as on Earth Reduced Reduced Same as on Earth Same as on Earth 12 Suppose that the LRV broke down, and had to be pushed back to the spacecraft by the astronauts. Ignoring the resistive effect of friction and air resistance, calculate the force needed to give the LRV a horizontal acceleration of 1.0 m/s2 on the Moon and on Earth. Force required on the Moon Force required on Earth A B C D 42 N 42 N 210 N 210 N 42 N 210 N 42 N 210 N

2011 End-of-Year Examination Secondary Three 7 Nanyang Girls’ High School AJL, BN, TWL Physics Paper / I [Turn over 13 A painter is standing on a plank supported at points A and B. Which of the following forces is not acting on the plank? A Weight of the plank B Normal contact force at A C Weight of the painter D Normal contact force due to can of paint 14 The four forces acting on an aircraft while it is flying are L lift due to wings R air resistance T thrust due to the engines W weight of the aircraft An aircraft is flying such that it is losing height at a constant rate but gaining forward speed. Which of the following is true? vertical forces horizontal forces A B C D L < W L = W not possible to determine L < W T > R T > R T > R T = R BA can of paint painter

2011 End-of-Year Examination Secondary Three 8 Nanyang Girls’ High School AJL, BN, TWL Physics Paper / I 15 A car is accelerating along a road in the direction shown. The wheel shown is connected to the engine. In which direction is the force of friction exerted by the road on the car tyre? 16 A book of mass 0.50 kg is placed on a table of mass 5.0 kg. What is the magnitude and direction of the force exerted by the book on the table? A 5.0 N upwards B 50 N upwards C 5.0 N downwards D 50 N downwards 17 Which of the following forces cannot be obtained from the addition of a 5.0 N force and a 8.0 N force? A 3.0 N B 8.0 N C 13.0 N D 15.0 N

2011 End-of-Year Examination Secondary Three 9 Nanyang Girls’ High School AJL, BN, TWL Physics Paper / I [Turn over 18 The diagram below shows the remaining portion of a uniform rectangular lamina where a quarter of the lamina (Section R) has been cut off. Which section does the centre of gravity of the above object lie in? A P B Q C R D S 19 The diagram below shows a boy standing on a uniform beam of negligible weight balanced on two supports, P and Q. Which of the following graphs best describes the magnitude