9702_s12_qp_52
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This document consists of 8 printed pages. DC (KN/SW) 42263/3 © UCLES 2012 [Turn over UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Level 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 all questions. You may lose marks if you do not show your working or if you do not use appropriate units. 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. PHYSICS 9702/52 Paper 5 Planning, Analysis and Evaluation May/June 2012 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. For Examiner’s Use 1 2 Total *8256494037* www.maxpapers.com
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Transcript of 9702_s12_qp_52
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This document consists of 8 printed pages.
DC (KN/SW) 42263/3 UCLES 2012 [Turn over
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONSGeneral Certificate of Education Advanced Level
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 all questions.You may lose marks if you do not show your working or if you do not use appropriate units.
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.
PHYSICS 9702/52Paper 5 Planning, Analysis and Evaluation May/June 2012 1 hour 15 minutesCandidates answer on the Question Paper.No Additional Materials are required.
For Examiners Use
1
2
Total
*8256494037*
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29702/52/M/J/12 UCLES 2012
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1 A hot air balloon is tied to the ground using a rope. As the wind blows with speed v, the rope makes an angle to the horizontal, as shown in Fig 1.1.
rope
wind with speed v
ground
Fig 1.1
It is suggested that tan is inversely proportional to v 2.
To model the hot air balloon in the laboratory, a balloon filled with helium is used. Design a laboratory experiment using a small helium-filled balloon to test the relationship between and v. You should draw a diagram, on page 3, showing the arrangement of your equipment. In your account you should pay particular attention to
(a) the procedure to be followed,
(b) the measurements to be taken,
(c) the control of variables,
(d) the analysis of the data,
(e) the safety precautions to be taken. [15]
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39702/52/M/J/12 UCLES 2012 [Turn over
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Diagram
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49702/52/M/J/12 UCLES 2012
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Defining the problem
Methods ofdata collection
Method of analysis
Safety considerations
Additional detail
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59702/52/M/J/12 UCLES 2012 [Turn over
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2 A student investigates how the resonant length L of a loaded wire varies with frequency f.
30 N
wire
signalgenerator
L
Fig. 2.1
For six different frequencies, the student records the length L.
Question 2 continues on the next page.
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69702/52/M/J/12 UCLES 2012
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It is suggested that f and L are related by the equation
f = 12L
T
where T is the tension in the wire and is a constant.
(a) A graph is plotted of f on the y-axis against 1 / L on the x-axis. Determine an expression for the gradient in terms of T and .
gradient = .................................................. [1]
(b) Values of f and L are given in Fig. 2.2.
f / Hz L / 102 m
256 54.5 0.5
294 48.0 0.5
330 42.5 0.5
350 40.0 0.5
396 35.5 0.5
440 32.0 0.5
Fig. 2.2
Calculate and record values of (1 / L) / m1 in Fig. 2.2. Include the absolute uncertainties in 1 / L. [3]
(c) (i) Plot a graph of f / Hz against (1 / L) / m1. Include error bars for 1 / L. [2]
(ii) Draw the straight line of best fit and a worst acceptable straight line on your graph. Both lines should be clearly labelled. [2]
(iii) Determine the gradient of the line of best fit. Include the uncertainty in your answer.
gradient = .................................................. [2]
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79702/52/M/J/12 UCLES 2012 [Turn over
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1.8250
270
290
310
330
350
370
390
410
430
450
2.0 2.2 2.4 2.6 2.8 3.0
(1 / L) / m1
f / Hz
3.2
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89702/52/M/J/12 UCLES 2012
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(d) (i) The tension T in the wire is 30 3 N. Using your answer to (c)(iii), determine the value of . Include an appropriate unit in your answer.
= .................................................. [2]
(ii) Determine the percentage uncertainty in .
percentage uncertainty = ..................................................% [1]
(e) An expression for is
= r 2
where the density of the wire is 8800 kg m3 and r is the radius of the wire.
(i) Using your answer to (d)(i), determine a value for r.
r = ..................................................m [1]
(ii) Determine the percentage uncertainty in your value of r.
percentage uncertainty = ..................................................% [1]
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.
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