12_SMSS Prelim 2010 4E Physics P2 QP

Name: …………………………………….……….. Reg. No. ………… Class: ………….… Secondary 4 Express 17th September 2010 Duration : 1 hour 45 minutes Total Marks : 80 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 and on any separate writing paper used. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Section A Answer all questions. Section B Answer all questions. Question 11 has a choice of parts to answer. Write your answers to Section A and to Questions 9 and 10 in the spaces provided on the Question Paper. Write your answer to Question 11 on the lined pages and, if necessary, continue on the separate Answer Paper provided. At the end of the examination, fasten all your work securely together. Candidates are reminded that all quantitative answers should include appropriate units. Candidates are advised to show all their working in a clear and orderly manner, as more marks are awarded for sound use of physics than for correct answers. The number of marks is given in brackets [ ] at the end of each question or part question. When necessary, assume the acceleration due to gravity, g to be 10 m/s 2. ________________________________________________________________________ This question paper consists of 19 printed pages PHYSICS 5058/02 St. Margaret’s Secondary School Preliminary Examinations 2010 [Turn over

2 Section A Answer all the questions in this section. 1 Fig. 1.1 shows an archer drawing back a bow to shoot an arrow horizontally towards a target. When he releases the arrow, it is accelerated over a distance of 0.40 m by the bow. It leaves the bow with a speed of 80.0 m/s, heading on a direct line to the centre of the target which is 16.0 m away. Assume that air resistance is negligible and that the arrow hits the target. (a) Calculate the time taken for the arrow to travel the distance of 0.40 m from release by the archer until the arrow just leaves the bow. Assume that the arrow has constant acceleration over this time. time = s [2] (b) Calculate the magnitude of the acceleration of the arrow over the 0.40 m in part (a). acceleration = m/s2 [2] 16.0 m Fig. 1.1

3 (c) Sketch a speed-time graph of the motion of the arrow in Fig. 1.2 below. Your graph should start at the time when the archer releases the arrow and end after the arrow has hit the target. Label your graph appropriately, indicating clearly when the arrow leaves the bow and when the arrow hits the target. Fig. 1.2 [4]

4 2 Fig. 2.1 shows a child sitting on a child seat and Fig. 2.2 shows a simplified drawing of the same child seat. The total weight, W, of the chi