NYGH-2021-S4-EOY-Physics-P2

Class Register Number Name End-of-Year Examination 2021 Secondary 4 PHYSICS Paper 2 1 hour 45 minutes Thursday 7 October 1100 – 1245 No Additional Materials are required READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write your name, register number and class on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Section A (40 marks) Answer all questions. Section B (30 marks) Answer all questions including questions 12, 13 and 14 Either or 14 Or. Circle question 14 Either or 14 Or in the grid on the right to indicate which question you have answered. INFORMATION FOR CANDIDATES You are reminded that all quantitative answers should include appropriate units. The use of an approved scientific calculator is expected, where appropriate. Show all your working in a clear and orderly manner, as more marks are awarded for sound use of Physics than for correct answers. You are advised to spend no longer than one hour on Section A and n o longer than 45 minutes on Section B. The number of marks is given in brackets [ ] at the end of each question or part question. Take the acceleration due to gravity g (or gravitational field strength) to be 10 m s-2 (or 10 N kg-1) near the Earth’s surface. Examiner’s Use Paper 2 (70 marks) Section A 1 2 3 4 5 6 7 8 9 10 11 Section B 12 13 14 E 14 O Total Paper 1 (30 marks) Overall 100 This document consists of 19 printed pages and 1 blank page. Setter(s): AJL & MS NANYANG GIRLS' HIGH SCHOOL [Turn over

2 Section A Answer all questions in this section. 1 Two cars start from rest at the same point along a straight racetrack. Car A starts from rest and accelerates constantly. Car B accelerates rapidly for 3.0 s and then maintains a constant speed. Fig. 1.1 (a) Determine the acceleration of car A. acceleration of car A = ………………………… [1] (b) Calculate the time at which the two cars have the same speed. time = ………………………… [2] (c) Given that the winning car crosses the finish line at t = 6.5 s, determine which car has won the race. Show all necessary calculations. Car …………. has won the race. [3] speed / m s-1 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 0 30 10 20 time t / s car A car B

3 [Turn over 2 A mechanic wants to turn a nut by applying a 20 N force to a spanner as shown in Fig. 2.1. Fig. 2.1 (a) Determine the moment of the force applied by the mechanic. moment of the force = …………………..………… [1] direction of the moment = …………..………………… [1] (b) State one way in which the mechanic could apply the same turning moment to the nut by using a smaller force. ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………