Physics Essay

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w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education .c rs om *1860505715* PHYSICS Paper 3 Extended Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. You may lose marks if you do not show your working or if you do not use appropriate units. Take the weight of 1 kg to be 10 N (i.e. acceleration of free fall = 10 m / s2). At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. 0625/33 October/November 2010 1 hour 15 minutes This document consists of 19 printed pages and 1 blank page. DC (NF/SW) 24984/4 © UCLES 2010 [Turn over 2 1 A young athlete has a mass of 42 kg. On a day when there is no wind, she runs a 100 m race in 14.2 s. A sketch graph (not to scale) showing her speed during the race is given in Fig. 1.1. speed m/s 8.0 0 0 3.0 time / s Fig. 1.1 14.2 (a) Calculate (i) the acceleration of the athlete during the first 3.0 s of the race, acceleration = ......................................................... [2] (ii) the accelerating force on the athlete during the first 3.0 s of the race, force = ......................................................... [2] (iii) the speed with which she crosses the finishing line. speed = ......................................................... [3] © UCLES 2010 0625/33/O/N/10 3 (b) Suggest two differences that might be seen in the graph if there had been a strong wind

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