51_CGS 2013 P1_WorkedOutAns

_________________________________________________________________________ This paper consists of 16 printed pages, including the cover page. CRESCENT GIRLS’ SCHOOL SECONDARY FOUR PRELIMINARY EXAMINATION 5058/01 PHYSICS 28 August 2013 PAPER 1 1 hour Class: Register No: Name: READ THESE INSTRUCTIONS FIRST Write your name, index number and class in the spaces provided at the top of this page and on the optical answer sheet. Do not use staples, paper clips, highlighters, glue or correction fluid. There are forty 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 record your choice in soft pencil on the optical answer sheet. Read the instructions in the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. Unless specified in the question, you may assume the following constants: Gravitational acceleration = 10 m/s2 Speed of light in vacuum = 3.0  108 m/s

2013 / CGS / 5058 / Prelim / P 1 2 1 A student ha s been asked to determine, as accurately as possible, the dimension s of a strand of optic fibre. The optic fibre is about 90 cm long and about 0.5 mm in diameter. Which measuring instruments should the student use? Length Diameter A Metre rule vernier calipers B Metre rule micrometer C Vernier calipers vernier calipers D Vernier calipers micrometer 2 A pair of vernier calipers is used to measure the thickness of a coin. With the jaws closed and no coin, the reading on the vernier calipers is shown in diagram 1. With the jaws closed around coin, the reading on the vernier calipers is shown in diagram 2. Diagram 1 Diagram 2 What are the zero error and the actual thickness of the coin? Zero error / cm Corrected reading / cm A – 0.02 4.05 B – 0.08 4.11 C 0.02 4.01 D 0.08 3.95 3 A strip of paper tape is pulled by a toy car under a vibrating arm. The arm vibrates regularly, making 50 dots per second. The average speed of the toy car is ___________. A 0.011 m/s B 1.1 m/s C 3.0 m/s D 300 m/s

2013 / CGS / 5058 / Prelim / P 1 3 4 A girl takes 6.0 s to w