NYGH 2018-S3MYE-Physics SectionA

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL Mid-Year Examination 2018 Secondary Three PHYSICS Section A 1 hour 30 minutes Wednesday 9 May 2018 08:45 – 10:15 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. Section A (20 marks) Do not use staples, paper clips, highlighters, glue or correction tape on the Multiple Choice Answer Sheet provided. Write on it in soft pencil your name, class and register number. There are twenty questions in this section. 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. Section B (30 marks) & Section C (10 marks) Printed in a separate document. INFORMATION FOR CANDIDATES You are advised to spend no longer than 30 minutes on Section A and no longer than 1 hour on Sections B and C. Take the acceleration due to gravity to be 10 m s-2 or gravitational field strength to be 10 N kg-1. Setters: HWQ, STK This document consists of 10 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over

2018 Mid-Year Examination Secondary Three 2 Nanyang Girls’ High School Setters: HWQ, STK Physics Section A (20 marks) Answer all questions. 1 The diagram below shows the measurement of the diameter of a marble from a pair of vernier calipers. If the pair of vernier calipers has a zero error of - 0.02 cm, what is the corrected reading of the diameter of the marble? A 10.00 cm B 10.04 cm C 10.18 cm D 10.24 cm 2 A light year is defined by the distance light travels in 1 year. The speed of light is 3 × 108 m s-1. Given that 1 year has 365 days, which of the following is the nearest estimate of 1 light year? A 106 Gm B 109 Gm C 1012 Gm D 1015 Gm 3 The diagram below shows a boy on a swing. The boy’s father, who is twice as heavy as the boy, take s over the swing from the boy. In both cases, the swing oscillates freely. Which of the statements about their periods of oscillation is correct? Assume air resistance is negligible. A The period of oscillation of the boy is half of his father’s. B The boy and his father have the same period of oscillation. C The period of oscillation of the boy is two times larger than his father’s. D The period of oscillation of the boy is four times larger than his father’s. cm 10 11 0 5 10

2018 Mid-Year Examination Secondary Three 3 Nanyang Girls’ High School Setters: HWQ, STK Physics [Turn over 30 m 4 Which of the following graph(s) describe a body moving with constant speed in a straight line? A (1) only B (1) and (2) only C (1) and (3) only D (2) and (3) only 5 Two identical balls are released at the same time as shown in the diagram below. One is released from a height of 30 m while the other is released from 15 m. Assume air resistance is negligible. Which quantity is the same for both balls? A acceleration B final velocity C increase in velocity D time of travel 30 m 15 m (1) (2) (3) acceleration / m s-2 time / s velocity / m s-1 time / s displacement / m time / s ground balls

2018 Mid-Year Examination Secondary Three 4 Nanyang Girls’ High School Setters: HWQ, STK Physics 6 The figure below shows the route taken by a school bus on a school day. The 9 blocks below are identical. What is the magnitude of the total displacement of the school bus? A 400 m B 500 m C 800 m D 1300 m 7 A van travels around a circular path of radius 50 m. It completes one round of the path in 1 minute. What is the distance travelled by the van and its average velocity in that 1 minute? Distance travelled / m Average velocity / m s-1 A 50 0.00 B 314 0.00 C 314 5.23 D 7850 131 Start End 500 m 400 m 400 m 500 m

2018 Mid-Year Examination Secondary Three 5 Nanyang Girls’ High School Setters: HWQ, STK Physics [Turn over 8 The graph below shows the velocity of two cars (A and B) over a period of time. From the information in the graph, which of the following statements is correct? A Car A is more powerful than car B. B Car A starts with a lower velocity as compared to car B. C Cars A and B travel with the same acceleration. D Cars A and B travel with constant velocities. 9 Two identical rocks were thrown vertically upwards with the same velocity on Earth and on the Moon respectively. Which graph best describes the position of the rock with time? A B C D position position position time time time time position Moon Moon Moon Moon Earth Earth Earth Earth time car B car A velocity 0

2018 Mid-Year Examination Secondary Three 6 Nanyang Girls’ High School Setters: HWQ, STK Physics 10 A basketball is thrown vertically downwards from a height of 10 m above the ground. The basketball bounces after hitting the ground. Which graph correctly shows how the velocity of the basketball varies with time? A B C D 11 The gravitational field strength on the surface of planet P is one tenth of that on the surface of planet Q. On the surface of P, a body has its mass measured to be 1.0 kg and its weight measured to be 1.0 N. What results are obtained for measurements of the mass and weight of the same body on the surface of planet Q? Mass on Q / kg Weight on Q / N A 1.0 0.1 B 1.0 10 C 10 10 D 10 100 time time time time velocity velocity velocity velocity

2018 Mid-Year Examination Secondary Three 7 Nanyang Girls’ High School Setters: HWQ, STK Physics [Turn over 12 Two cylinders E and F are made of copper as shown below. The height of E is twice the height of F. The diameter of E is half the diameter of F. Which statement is correct? A The density of cylinder E is four times that of cylinder F. B The density of cylinder E is twice that of cylinder F. C The density of cylinder E is equal to that of cylinder F. D The density of cylinder E is half that of cylinder F. 13 A submarine descends vertically at a constant velocity. The three forces acting on the submarine are viscous drag D, upthrust U and weight W. The forces are not drawn to scale. Which relationship between their magnitudes is correct? A weight < drag B weight = drag C weight < upthrust D weight > upthrust E F W U D

2018 Mid-Year Examination Secondary Three 8 Nanyang Girls’ High School Setters: HWQ, STK Physics 14 When does a body accelerate uniformly? A When the resultant force is zero. B When the resultant force is constant but not zero. C When the resultant force increases uniformly with respect to time. D When the resultant force is proportional to the displacement from a fixed point. 15 A resultant force F is applied to an object . At one instant of time, the object has velocity v and acceleration a. Which quantities must be in the same direction? A a and F only B a and v only C v and F only D v, F and a 16 The diagram below shows a block of mass 0.60 kg is on a rough horizontal surface. A force of 12 N is applied to the block and it accelerates at 4.0 m s–2. What is the magnitude of the frictional force acting on the block? A 2.4 N B 5.3 N C 6.7 N D 9.6 N 17 A helicopter rises vertically with a constant speed. According to Newton’s