NYGH 2018-S4EOY-Adv Physics P3 with ans

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2018 Secondary Four PHYSICS (ADVANCED) Paper 3 Multiple Choice 50 minutes Tuesday 9 October 2018 13:30 – 14:20 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 your name, class and register number on the Optical Answer Sheet in soft pencil. 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. Setter: AJL This document consists of 16 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over

2018 End-of-Year Examination Secondary Four Advanced Physics 2 Nanyang Girls’ High School Setter: AJL Physics III 1 Each diagram shows three vectors of equal magnitude. In which diagram is the magnitude of the resultant vector different from the other three? A B C D 2 A steel ball is released from rest at a distance above a rigid horizontal surface and is allowed to bounce. Which graph best represents the variation with time t of acceleration a? c C D A B

2018 End-of-Year Examination Secondary Four Advanced Physics 3 Nanyang Girls’ High School Setter: AJL Physics III [Turn over 3 The following is a displacement-time graph of a ping-pong ball that is released from a height of 1 m above a table with zero initial speed. The ping-pong ball bounces several times. Neglecting the air resistance, which point in the graph represents the second bounce? A E B F C G D H 4 A ball is thrown at an angle of 37.0° from the horizontal with an initial velocity of 23.0 m s-1 and reaches a maximum height h. Neglect air resistance. With what initial speed must the ball be thrown vertically upwards to reach the same maximum height h? A 13.8 m s-1 B 17.3 m s-1 C 18.4 m s-1 D 23.0 m s-1 5 A puck moves with uniform acceleration on a straight air track (frictionless). It passes two points A and B with speed 2.0 m s-1 and 8.0 m s-1 respectively. If the puck passes through the two points within a time of 0.1 s, what is the distance between A and B? A 20 cm B 30 cm C 40 cm D 50 cm

2018 End-of-Year Examination Secondary Four Advanced Physics 4 Nanyang Girls’ High School Setter: AJL Physics III 6 A juggler throws balls into air. He throws one whenever the previous one is at the highest point. How high do the balls rise if he throws n balls each second? A g / (4n 2) B 2n2g C g / (2n2) D g/n 7 The diagram shows the top view of a frictionless sheet of ice. A puck, tied with a string to a point P, slides on the surface of the ice in the circular path shown. If the string suddenly breaks when the puck is in the position shown above, which path best represents the puck’s subsequent motion? 8 A person is pushing horizontally on a box with a constant force, causing it to slide across the floor with a constant speed. If the person suddenly stops pushing on the box, what will happen to the box? A The box will immediately come to a stop. B The box will continue moving at a constant speed for a while, then gradually slow down to a stop. C The box will immediately move at a slower but constant speed. D The box will immediately begin to slow down and eventually stop. 9 When does a girl in an elevator have the greatest apparent weight? A when the elevator is moving downward at constant speed B when the elevator is moving upward at constant speed C when the elevator is moving downward with decreasing speed D when the elevator is moving upward with decreasing speed A string P puck B C D

2018 End-of-Year Examination Secondary Four Advanced Physics 5 Nanyang Girls’ High School Setter: AJL Physics III [Turn over 10 A racing car of mass 500 kg, including driver but not fuel, decelerates from a speed of 50 m s-1 to 30 m s-1 when approaching a bend. The brakes exert a fixed retarding force of 7000 N. The time for the car to decelerate when it is almost out of fuel is t1. The time for it to decelerate when it has a full load of 130 kg of fuel is t2. What is the difference (t2 - t1) in the two timings? A 0.37 s B 0.56 s C 0.93 s D 1.43 s 11 A light rod is acted upon by three forces P, Q and R. Which diagram shows the position and direction of each of the forces when the rod is in equilibrium? A B C D P Q R P Q R Q P R Q P R

2018 End-of-Year Examination Secondary Four Advanced Physics 6 Nanyang Girls’ High School Setter: AJL Physics III 12 A uniform tube, closed at both ends, contains a 57cm long column of mercury which divides two columns of air of each 30 cm long as shown in the diagram below. The air in the column is initially at an atmospheric pressure of 76 cmHg. If the tube is then set upright on Earth, what are the eventual lengths of the top and bottom columns respectively? A 30 cm, 30 cm B 35 cm, 25 cm C 45 cm, 15 cm D 40 cm, 20 cm 13 A ball of mass m falls freely from rest. When it has reached a speed v, it strikes a vertical spring. The spring is compressed by a distance y before the ball moves upwards again. Assume that all the energy the ball loses (during the compression of the spring) becomes elastic potential energy in the spring. What is the average force exerted by the spring during its compression? A 𝑚𝑣2 2𝑦 B 𝑚 2𝑦 (𝑣2 − 2𝑔𝑔) C 𝑚𝑣2 𝑦 D 𝑚 2𝑦 (𝑣2 + 2𝑔𝑔) 30 cm 57 cm 30 cm y

2018 End-of-Year Examination Secondary Four Advanced Physics 7 Nanyang Girls’ High School Setter: AJL Physics III [Turn over 14 A beam of white light is incident on a triangular glass prism with an index of refraction of about 1.5 for visible light producing a spectrum. Initially, the prism is in a glass aquarium filled with air as shown below. If the aquarium is then filled with water with an index of refraction of 1.3, which of the following is true? A The spectrum produced has less separation between red and violet than that produced in air. B The spectrum produced has greater separation between red and violet than that produced in air. C The positions of the red and violet are reversed in the spectrum. D The spectrum produced is the same as that produced in air. 15 The critical angle for light going from medium X into medium Y is θ. The speed of light in medium X is v. What is the speed of light in medium Y ? A v / cos θ B v cos θ C v / sin θ D v sin θ 16 The S-waves (transverse) and P-waves (longitudinal) produced by earthquakes travel at different speeds through the earth. If the S-waves travel about 4000 m s -1 while the P-waves travel at nearly 7000 m s-1, how far away must an earthquake be for the P-waves to arrive 2.0 minutes before the S- waves? A 360 km B 480 km C 840 km D 1120 km

2018 End-of-Year Examination Secondary Four Advanced Physics 8 Nanyang Gi