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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level * 2 2 8 5 7 8 0 0 1 9 * PHYSICS…
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level * 2 2 8 5 7 8 0 0 1 9 * PHYSICS 9702/34 Advanced Practical Skills 2 May/June 2011 2 hours Candidates answer on the Question Paper. Additional Materials: As listed in the Confidential Instructions. 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 soft 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 both questions. You will be allowed to work with the apparatus for a maximum of one hour for each question. You are expected to record all your observations as soon as these observations are made, and to plan the presentation of the records so that it is not necessary to make a fair copy of them. You may lose marks if you do not show your working or if you do not use appropriate units. Additional answer paper and graph paper should be submitted only if it becomes necessary to do so. You are reminded of the need for good English and clear presentation in your answers. 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. For Examiner’s Use 1 2 Total This document consists of 10 printed pages and 2 blank pages. DC (CW/DJ) 34809/5 © UCLES 2011 [Turn over 2 You may not need to use all of the materials provided. For Examiner’s Use 1 In this experiment, you will investigate the angle through which a loaded beaker rolls as a turning force is applied. (a) The apparatus has been assembled as shown in Fig. 1.1. rails 50 60 70 80 90 40 1 30 00 20 110 10 120 130 0 140 150 160 17 0 18 0 masses string loop Fig. 1.1 (b) Make sure that the beaker is positioned so that the masses do not touch the rails. (c) Using the set square, measure and record the angle x, as shown in Fig. 1.2. x rail Fig. 1.2 x = .................................................. [1] © UCLES 2011 9702/34/M/J/11 3 (d) (i) Hook the mass hanger on the string loop. Record the mass m that is suspended For from the loop. Examiner’s Use m = ...................................................... (ii) Wait for the beaker to stop moving, making sure that the beaker is positioned so that the masses do not touch the rails. (iii) Using the set square, measure and record the angle y, as shown in Fig. 1.3. y string Fig. 1.3 y = .................................................. [1] (iv) Calculate θ, where θ = y–x. θ = ...................................................... © UCLES 2011 9702/34/M/J/11 [Turn over 4 (e) Change m by adding masses to the hanger and repeat (d)(ii), (d)(iii) and (d)(iv). For Repeat this procedure until you have six sets of values for m (the total suspended mass) Examiner’s and angle y. Use Include in your table values for θ (using your answer from (c)) and sinθ. [9] (f) (i) Plot a graph of sinθ on the y-axis against m on the x-axis. [3] (ii) Draw the straight line of best fit. [1] (iii) Determine the gradient and y-intercept of this line. gradient = ....................................................... y-intercept = ....................................................... [2] © UCLES 2011 9702/34/M/J/11 5 For Examiner’s Use © UCLES 2011 9702/34/M/J/11 [Turn over 6 (g) (i) Unhook the masses from the string loop and remove the beaker from the rails. For Examiner’s (ii) Take measurements to determine the radius r of the beaker. Use r = .................................................. [1] (h) It is suggested that the relationship between θ and m is rm sinθ = +b a where a and b are constants. Using your answers from (f)(iii) and (g)(ii), determine the value of a. Give an appropriate unit. a = .................................................. [2] © UCLES 2011 9702/34/M/J/11 7 You may not need to use all of the materials provided. For Examiner’s Use 2 In this experiment you will investigate the motion of a mass suspended from a rubber band. (a) (i) Suspend the rubber band from the retort stand and hang the 100 g mass hanger from the rubber band, as shown in Fig. 2.1 rubber band 100 g mass hanger Fig. 2.1 (ii) Determine and record the radius R of the suspended mass hanger at its widest point. R = .................................................. [2] (iii) Estimate the percentage uncertainty in R. percentage uncertainty = .................................................. [1] © UCLES 2011 9702/34/M/J/11 [Turn over 8 (b) (i) Twist the mass hanger about half a turn and release it so that it turns between For positions A and B, as shown in Fig. 2.2. Examiner’s Use A B Fig. 2.2 (ii) Take measurements to determine the time T for the mass hanger to rotate from A to B and back to A. (This may be determined accurately by using the time for several turns.) T = .................................................. [2] (c) For a mass hanger of mass m and radius R, it is suggested that T is related to a quantity C, where C = mR 2. Calculate the value of C for this mass hanger. Give an appropriate unit. C = .................................................. [1] © UCLES 2011 9702/34/M/J/11 9 (d) (i) Remove the 100 g mass hanger and suspend the 50 g mass hanger from the rubber For band. Examiner’s Use (ii) Repeat (a)(ii), (b) and (c) for this new suspended mass hanger. R = ...................................................... T = ...................................................... C = ...................................................... [4] (e) (i) It is suggested that the relationship between T and C is T2 = k C where k is a constant. Using your data, calculate two values of k. first value of k = ...................................................... second value of k = ...................................................... [1] © UCLES 2011 9702/34/M/J/11 [Turn over 10 (ii) Explain whether your results support the suggested relationship in (e)(i). For Examiner’s Use .................................................................................................................................. .................................................................................................................................. .................................................................................................................................. .............................................................................................................................. [1] (f) (i) Describe four sources of uncertainty or limitations of the procedure for this experiment. 1. ............................................................................................................................... .................................................................................................................................. 2. ............................................................................................................................... .................................................................................................................................. 3. ............................................................................................................................... .................................................................................................................................. 4. ............................................................................................................................... .................................................................................................................................. [4] (ii) Describe four improvements that could be made to this experiment. You may suggest the use of other apparatus or different procedures. 1. ............................................................................................................................... .................................................................................................................................. 2. ............................................................................................................................... .................................................................................................................................. 3. ............................................................................................................................... .................................................................................................................................. 4. ............................................................................................................................... .................................................................................................................................. [4] © UCLES 2011 9702/34/M/J/11 11 BLANK PAGE © UCLES 2011 9702/34/M/J/11 12 BLANK PAGE Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. © UCLES 2011 9702/34/M/J/11
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