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AS Level Physics Practical Paper
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  This document consists of 10  printed pages and 2  blank pages. DC (LEO/SW) 48424/4 © UCLES 2012 [Turn over UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONSGeneral Certificate of EducationAdvanced Subsidiary Level and Advanced Level *4 0 0 9 3 624 07* PHYSICS   9702/33 Paper 3 Advanced Practical Skills 1 May/June 2012   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 used 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 Use12Total   w  w  w  . X   t  r  e  m  e  P  a   p  e  r  s  . c  o  m    2 9702/33/M/J/12 © UCLES 2012 For Examiner’s Use   You may not need to use all of the materials provided.1 In this experiment, you will investigate how the extension of an arrangement of springs depends on the loads applied to it.  (a) (i) Set up the apparatus as shown in Fig. 1.1.woodenrodsinglespringrod of clamp Brod of clamp A h  0 strings withloopsbenchtwospringsbossstands65   cm Fig. 1.1  Place the rod of clamp A, supporting the two springs, approximately 65 cm above the bench.  Once fixed do not change the position of the rod of clamp A throughout the experiment.  Suspend the wooden rod, with strings attached, using the springs as shown. Adjust the position of the rod of clamp B until the wooden rod is horizontal.   Ensure the springs hang vertically.  (ii) Measure and record the distance h  0  between the centre of the rod of clamp B (supporting the single spring) and the bench.  h  0  = ..............................................m [1]  3 9702/33/M/J/12 © UCLES 2012 [Turn over For Examiner’s Use   (b) (i) Add masses to the wooden rod as shown in Fig. 1.2. The 100 g mass hanger should be attached to the longer, central string.100   g mass hangertotal mass m   = 150   gwooden rod Fig. 1.2 (ii) Adjust the height of the rod of clamp B until the wooden rod is horizontal.  (iii) Measure and record the distance h   between the centre of the rod of clamp B and the bench, as shown in Fig. 1.3. h  Fig. 1.3   h   = ..................................................[1]  4 9702/33/M/J/12 © UCLES 2012 For Examiner’s Use   (iv) Calculate the value of ( h  0  – h  ). ( h  0  – h  ) = ......................................................  (c) By increasing the mass m  , repeat (b)(ii) , (b)(iii)  and (b)(iv)  until you have five sets of values of m   and h  . Do not change the mass attached to the longer, central string.   Include values of ( h  0  – h  ) m   and 1 m   in your table. [10]  (d) (i) Plot a graph of ( h  0  – h  ) m   on the y  -axis against 1 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]
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