Sec_4_Science_Physics_SA2_2018_Chung_Cheng

1 Preliminary Examination 2018 Secondary 4 Express / 5 Normal Academic Candidate Name Register No Class Science Physics Paper 1 Date: 24 Aug 2018 5076, 5077 Duration: 1 h (with Chemistry/Biology) READ THESE INSTRUCTIONS FIRST Setter: Mr Thong Nai Kee This paper consists of 9 printed pages, INCLUDING the cover page. CHc CHUNG CHENG HIGH SCHOOL YISHUN Уி CCCCCCCCCCCCHc Answer all questions in the OMS provided. You may use a soft pencil for any diagrams, graphs or rough working. Do not use paper clips, highlighters, glue or correction fluid. For examiner’s use 20 www.KiasuExamPaper.com 84

2 1. The diagram below shows a pair of vernier calipers set to measur e a metal pipe. Given that the pipe has an internal diameter of 1.02 cm, what is the thickness of the wall of the metal pipe? A 0.28 cm B 0.38 cm C 0.56 cm D 0.76 cm 2. Which of the following distance- time graph best represents that of a rock, which is dropped from a tall building? Assume that air resistance is negligible A B C D. distance time distance time distance time distance time www.KiasuExamPaper.com 85

3 3. An object is moving to the right in a straight line with a constant speed. Which of the following statements is true ? A There are no forces acting on the object. B There is a larger number of forces acting on the object to the right than to the left. C There is only one force acting on the object and it is acting to the right. D The resultant force acting on the object is zero. 4. The diagram below shows a single brick and a pile of three bricks. ALL the bricks are identical. Which of the following statements is true? A The pile of bricks has the same density but three times the volume and mass of the single brick. B The pile of bricks has the same mass but three times the density and volume of the single brick. C The pile of bricks has the same volume but three times the density and mass of the single brick. D The pile of bricks has three times the mass, volume and density of the single brick 5. The diagram shows a uniform cube of weight 100 N on a rough surface. What is the horizontal force F needed to just lift the cube? A 50 N B 100 N C 200 N D F depends on the friction between the cube and the rough surface. 100 N F www.KiasuExamPaper.com 86

4 6. A girl of weight 450 N runs up a flight of 20 steps in 10.0 s. Each step has a height of 10 cm. What is the average power developed by the girl ? A 22.5 W B 90 W C 225 W D 900 W 7. A girl of weight 450 N runs up a flight of 20 steps in 10.0 s. Each step has a height of 10 cm. What is the average power developed by the girl ? A 22.5 W B 90 W C 225 W D 900 W 8. A cube of ice is heated to water, then to steam. Which of the following is true? A The molecules expand as ice changes to steam. B The molecules move closer to one another as ice changes to steam. C The molecules move