NASS Sc(Chem) Prelim

Name: .... .... .. . .. . . .. . . ....... .. ... . .. . . ... ... . .. .. . .. .. . . .. . . . . . .. .. .. ... Register no: . .. .... .. . Class: ............. . NGEE ANN SECONDARY SCHOOL [QJ PRELIMINARY EXAMINATION SCIENCE PHYSICS/CHEMISTRY 5086/01 PAPER 1 23 August 2024 Additional Materials: Optical Answer Sheet READ THESE INSTRUCTIONS FIRST 1. Write in soft pencil. 2. Do not use staples, paper clips, highlighters, glue or correction fluid. 3. Write your name and index number on the Optical Answer Sheet in the spaces provided unless this has been done for you. 1 h 4. There are forty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. 5. Choose the one you consider correct and record your choice in soft pencil on the separate Optical Answer Sheet. 6. Read the instructions on the Optical Answer Sheet very carefully. 7. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. The total number of marks for this paper is 40. 8. Any rough working should be done in this booklet. 9. A copy of the Data sheet and Periodic Table are printed on page 20 and 21 respectively. 10. The use of an approved scientific calculator is expected, where appropriate. This document consists of 21 printed pages and! blank page. BP-227

1 Which pair consists of two vector quantities? A velocity and moment 8 pressure and force C mass and energy D potential difference and acceleration 2 The diagram shows two cameras used to determine the average speed of a car along a stretch of road. Cameras 1 and 2 detect the entry and exit of the vehicle along that stretch respectively. The diagrams below show the times at which cameras 1 and 2 capture the entry and the exit of the vehicle. The distance between the two cameras is 800 m. At entry At exit What is the average speed of the vehicle between the two cameras? A 6.6 m/s 8 7.4 m/s c 8.4 m/s D 31 m/s

3 The graph shows the speed of a car as it starts from rest. During part of this time, the acceleration is uniform. speed 30 m/s 25 20 15 10 5 v / v I v I / v 1 2 3 4 What is the magnitude of this uniform acceleration? 5 A 5.0 m/s2 B 6.0 m/s2 C 10 m/s2 time/s 6 D 20 m/s2 4 An astronaut sits in a space shuttle which takes off from the surface of the Earth. During his journey into space, what happens to the mass and weight of the astronaut due to the gravitational field of the Earth? mass weight A unchanged increases B unchanged decreases c decreases increases D decreases decreases BP-230

5 The diagram shows a watermelon and durian placed in two similar plastic bags. Both the watermelon and durian have the same mass. watermelon durian Why is the plastic bag containing the durian more likely to tear than the one containing the watermelon? A The force exerted by the durian on the plastic bag is larger than that exerted by the watermelon on the plastic bag. B The force exerted b