NYGH 2017-S3EOY-Physics P1 with ans

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2017 Secondary Three PHYSICS 45 minutes Paper 1 Multiple Choice 08:45 – 09:30 Monday 9 October 2017 Additional materials: Optical Answer Sheet (OAS) READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write your name, register number and class in the spaces at the top of this page. Do not use staples, paper clips, highlighters, glue or correction fluid on the Multiple Choice Optical Answer Sheet (OAS) provided. Write in soft pencil your name, class and register number on the Optical Answer Sheet. 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 shade the lozenge of your choice in soft pencil on the Optical Answer Sheet. INFORMATION FOR CANDIDATES Each correct answer will score one mark. A mark will not be deducted for a wrong answer. The use of an approved scientific calculator is expected, where appropriate. Any rough working should be done in this booklet. The acceleration due to gravity (or gravitational field strength) g is taken to be 10 m s -2 (or 10 N kg-1) near the Earth’s surface. Setters: AJL & CMH This document consists of 13 printed pages and 1 blank page. NANYANG GIRLS’ HIGH SCHOOL [Turn over

2017 End-of-Year Examination Secondary Three 2 Nanyang Girls’ High School Setters: AJL & CMH Physics I 1 What is the reading shown on the micrometer screw gauge? A 2.13 mm B 3.13 mm C 2.63 mm D 5.13 mm 2 A student uses a spring balance to measure the weight of an object hanging from it. The spring balance is marked every 0.2 N but has a zero error of 0.4 N. The student is not aware of this zero error and writes down a reading of 1.5 N. Is the reading accurate and is it measured to the correct precision of the instrument? accurate precise A no no B no yes C yes no D yes yes 3 Which of the following is a scalar quantity? A The displacement of a moving bus. B The tension in a cable supporting a lift. C The normal contact force on a rolling ball. D The liquid pressure on a diver underwater. 4 A bird flies 3.0 km due west and then 2.0 km due north. What is the magnitude of the bird’s displacement? A 2.0 km B 3.0 km C 3.6 km D 5.0 km 15 10

2017 End-of-Year Examination Secondary Three 3 Nanyang Girls’ High School Setters: AJL& CMH Physics I [Turn over 5 In an experiment, a light gate is set up (with a light source and light sensor) connected to an electronic timer. A trolley with a piece of card of width 5.0 cm passes through the light gate in 0.25 s. A quantity is calculated: s 0.25 cm 5.0 = 20 cm s−1 What does this quantity represent? A The average speed of the trolley passing the light gate. B The instantaneous speed of the trolley passing the light gate. C The average acceleration of the trolley passing the light gate. D The instantaneous acceleration of the trolley passing the light gate. 6 A car can accelerate from rest to 200 km h−1 in 10 s. What is its average acceleration? A 2.0 m s−2 B 2.8 m s−2 C 4.6 m s−2 D 5.6 m s−2 direction of motion of trolley piece of card electronic timer light sensor light source

2017 End-of-Year Examination Secondary Three 4 Nanyang Girls’ High School Setters: AJL & CMH Physics I 7 Ball X is thrown straight up in the air and, at the same instant, ball Y is released from rest and allowed to fall. Neglect air resistance. Which velocity-time (v-t) graph best represents the motion of the two balls? A B C D 8 Consider the following objects: (1) A trolley moving with uniform velocity. (2) A swinging pendulum bob. (3) A baseball just hit by a bat. (4) A free falling object. Which of the above objects is/are acted on by an unbalanced force? A (1), (2), (3) and (4) B (2), (3) and (4) only C (3) and (4) only D (4) only v 0 t X Y v 0 t X Y v 0 t X Y v 0 t X Y

2017 End-of-Year Examination Secondary Three 5 Nanyang Girls’ High School Setters: AJL& CMH Physics I [Turn over 9 A brick is weighed using two instruments: (1) a newton-meter (or spring balance) giving readings in grams (2) a pair of scales (or pan balance) balancing with known masses in grams The brick is weighed again on the moon using both instruments. Are the readings for each instrument the same or different when taken on earth and on the moon? on newton-meter on scales A same same B different different C different same D same different 10 The following graphs describe the motion of an object. (1) displacement-time (2) velocity-time (3) acceleration-time graph graph graph Which of the above graphs show(s) that a constant resultant force is acting on this object? A (1) and (2) only B (1) and (3) only C (2) and (3) only D (1), (2) and (3) s t v t a t

2017 End-of-Year Examination Secondary Three 6 Nanyang Girls’ High School Setters: AJL & CMH Physics I 11 The diagram below shows the trajectory (path) of a cannon-ball fired from a cannon. Which of the following best shows the direction of the resultant force acting on the cannon-ball at different times during its trajectory? A B C D 12 Which diagram shows the correct addition of 3 N and 4 N vectors? A B C D 13 In deep outer space, there is no gravity. If a force acts on an object, it will gain a great speed after some time. What is the speed of a 100 g mass if a force of 2.0 N acts on it for 2 days? The mass is initially at rest. A 2.4 × 10 5 m s−1 B 3.5 × 106 m s−1 C 7.4 × 107 m s−1 D 3.0 × 108 m s−1 3 N 4 N 5 N 3 N 4 N 5 N 3 N 4 N 5 N 3 N 4 N 5 N

2017 End-of-Year Examination Secondary Three 7 Nanyang Girls’ High School Setters: AJL& CMH Physics I [Turn over 14 A parachutist opens a parachute and an upward force acts on it. The mass of the parachutist and parachute are 50.0 kg and 5.0 kg respectively. The parachutist and parachute accelerate downwards at 1.0 m s−2. What is the total air resistance acting on them? A 450 N B 495 N C 550 N D 605 N 15 A plane lamina is freely suspended from point P. The weight of the lamina is 2.5 N and its centre of gravity is at C. The lamina is displaced to the position shown. What is the initial moment that will cause the lamina to swing? A 15 N cm anti-clockwise B 20 N cm clockwise C 25 N cm clockwise D 25 N cm anti-clockwise 16 An object hung at one end of a rod is balanced by a 100 g mass as shown below. The 100 g mass is placed at a distance d from the pivot. If the setup is brought to Mars where the gravitational field strength is 3.7 N kg -1, what should be the distance between the 100 g mass and the pivot to keep the rod balanced? A d B 3.7 d C 3.7 d / 10 D 10 d / 3.7 PQ = 8.0 cm QC = 6.0 cm CP = 10.0 cm X P C Q 100 g mass object d pivot

2017 End-of-Year Examination Secondary Three 8 Nanyang Girls’ High School Setters: AJL & CMH Physics I 17 The diagram below shows the cross-sections of three identical containers. Container X is empty, container Y is partially set with agar and container Z is completely set with agar. Which of the following statements is NOT true about the containers? A X and Z have similar maximum angles of tilt before they topple. B The maximum angle of tilt before the container topples is largest for Y . C The maximum angle of tilt for Z before it topples increases if the agar is replaced with a denser material. D The maximum angle of tilt before the container topples is increased when the