Mastering Physics HSC Sample - Sciencepress
Brian Shadwick
Science Press 2020First published 2020Science PressUnit 7, 23-31 Bowden StreetAlexandria NSW 2015 AustraliaTel: 61 2 9020 1840 Fax: 61 2 9020 auAll rights reserved. No part of this publicationmay be reproduced, stored in a retrieval system,or transmitted in any form or by any means,electronic, mechanical, photocopying, recordingor otherwise, without the prior permission ofScience Press. ABN 98 000 073 861
ContentsWords to Watch ivPhysics Paper 1 5Physics Paper 2 27Physics Paper 3 51Physics Paper 4 73Physics Paper 5 95Physics Paper 6 117Physics Paper 7 137Physics Paper 8 157Answers 175Data Sheet 200Formula Sheet 201Periodic Table 202Science PressMASTERING PHYSICSISBN 978-0-85583-8294iiiContents
Words to Watchaccount, account for State reasons for, report on,give an account of, narrate a series of events ortransactions.explain Make something clear or easy tounderstand.analyse Interpret data to reach conclusions.extrapolate Infer from what is known.annotate Add brief notes to a diagram or graph.hypothesise Suggest an explanation for a groupof facts or phenomena.extract Choose relevant and/or appropriate details.apply Put to use in a particular situation.assess Make a judgement about the value ofsomething.identify Recognise and name.calculate Find a numerical answer.investigate Plan, inquire into and drawconclusions about.interpret Draw meaning from.clarify Make clear or plain.classify Arrange into classes, groups orcategories.justify Support an argument or conclusion.comment Give a judgement based on a givenstatement or result of a calculation.list Give a sequence of names or other briefanswers.compare Estimate, measure or note how thingsare similar or different.measure Find a value for a quantity.label Add labels to a diagram.outline Give a brief account or summary.construct Represent or develop in graphical form.plan Use strategies to develop a series of steps orprocesses.contrast Show how things are different oropposite.predict Give an expected result.create Originate or bring into existence.propose Put forward a plan or suggestion forconsideration or action.deduce Reach a conclusion from giveninformation.recall Present remembered ideas, facts orexperiences.define Give the precise meaning of a word, phraseor physical quantity.demonstrate Show by example.relate Tell or report about happenings, events orcircumstances.derive Manipulate a mathematical relationship(s)to give a new equation or relationship.represent Use words, images or symbols toconvey meaning.describe Give a detailed account.select Choose in preference to another or others.design Produce a plan, simulation or model.sequence Arrange in order.determine Find the only possible answer.show Give the steps in a calculation or derivation.discuss Talk or write about a topic, taking intoaccount different issues or ideas.sketch Make a quick, rough drawing of something.distinguish Give differences between two or moredifferent items.state Give a specific name, value or other briefanswer.draw Represent by means of pencil lines.suggest Put forward an idea for consideration.estimate Find an approximate value for anunknown quantity.summarise Give a brief statement of the mainpoints.evaluate Assess the implications and limitations.synthesise Combine various elements to make awhole.solve Work out the answer to a problem.examine Inquire into.Words to WatchivScience PressMASTERING PHYSICSISBN 978-0-85583-8294
Name:Sample Higher School Certificate ExaminationPHYSICSPaper 1GeneralInstructions Total marks:100Section 1 – 20 marks (pages 6 to 13)Reading time – 5 minutesWorking time – 3 hoursWrite using black penDraw diagrams using pencilBoard approved calculators may be usedA data sheet, formula sheet and periodic table are provided at the back of this book Attempt Questions 1 to 20 Allow about 35 minutes for this sectionSection 2 – 80 marks (pages 14 to 26) Attempt Questions 21 to 38 Allow about 2 hours and 25 minutes for this sectionScience PressMASTERING PHYSICSISBN 978-0-85583-82945HSC Sample Exam Papers and Answers
Section I20 marksAttempt Questions 1 to 20Allow about 35 minutes for this partUse the multiple choice answer sheet below for Questions 1 to 20ABCDA1112123134145156167178189191020BCDTotal correct/20HSC Sample Exam Papers and Answers6Science PressMASTERING PHYSICSISBN 978-0-85583-8294
Section I20 marksAttempt Questions 1 to 20Allow about 35 minutes for this sectionUse the multiple choice answer sheet for Questions 1 to 201A DC voltage was applied to a cathode ray tube and it was observed that the cathode rays travelled ina straight line beam which was affected by a magnetic field.What could be concluded from this observation?A. Cathode rays must be charged particles.B. Cathode rays are electrons.C. Cathode rays will not be affected by an electric field.D. Cathode rays have very little mass.A sample of radioactive element X decayed over time. The graph shows the percentage of element Xremaining from the initial sample as a function of time.Percentage remaining (%)2100806040200.0010203040 50 60 70Time (minutes)8090100How much of a 20 g sample of element X would remain after an hour?A. About 2.5 gB. About 4.8 gC. About 24 gD. About 76 gScience PressMASTERING PHYSICSISBN 978-0-85583-82947HSC Sample Exam Papers and Answers
3A proton has a mass of 1.67 10 27 kg. What is the magnitude of the momentum (in kg m s 1) of aproton travelling at 0.6 c?A. 2.71 10–11B. 3.38 10–11C. 3.01 10–19D. 3.76 10–194Chris and Pat carried out independent experiments to investigate Malus’ law. They graphed the resultsof their experiments. The graphs are shown below.1.00510.9950.990.9850.98II0 0.9750.970.9650.960.9550.95Chris’s graphPat’s graph1.210.8I0.6I00.40.20510Angle (degrees)15002040 60 80Angle (degrees)100Based on the two graphs, which of the following is correct?A. Pat’s results are more valid because she has covered a greater range of incident angles.B. Pat’s conclusion will be incorrect because her measurements have not been precise enough toshow the true relationship.C. Chris’s results are more accurate because the relationship between intensity transmitted andangle is more clearly shown.D. Chris’s results will be more reliable because more data points have been taken.HSC Sample Exam Papers and Answers8Science PressMASTERING PHYSICSISBN 978-0-85583-8294
5Consider the two planets, X and Y shown below. They are the same size, but Y is twice the mass of X.XYddMass MMass 2MThe gravitational field on the surface of X is ‘g’. What is the gravitational field on the surface of Y?A. 0.25 gB. 0.5 gC. 2 gD. 4 g6Consider the diagram which shows the path of aplanet orbiting a star. According to Kepler, if thearc length of each of the sectors shown representsthe same period of time for the orbiting body, thenA. the planet is orbiting with constant speed.B. the planet travels faster further from the star.C. the grey and white sectors are all equal area.D. the grey and white sector areas represent thetotal distance travelled by the planet in eachperiod of time.7A car of mass m travels around a curve with velocity v. What will happen to the magnitude of thecentripetal force if the velocity doubles?A. It will decrease by a factor of two.B. It will increase by a factor of two.C. It will decrease by a factor of four.D. It will increase by a factor of four.Science PressMASTERING PHYSICSISBN 978-0-85583-82949HSC Sample Exam Papers and Answers
8Two masses, 6 kg and 8 kg, are hung from theends of a 70 cm long rod that has marks every10 cm, as shown in the diagram. Taking the massof the rod as negligible, at which of the pointsindicated should a cord be attached if the rod is toremain horizontal when suspended from the cord?A. AABCD8 kg6 kgB. BC. CD. D9A charge of –6.0 µC experiences a force of 3.6 10–5 N south at point P when it is placed in anelectric field. What is the strength of the electric field at P?A. 0.17 N C 1 southB. 0.17 N C 1 northC. 6 N C 1 southD. 6 N C 1 north10 Which graph best shows the relationship between the force between parallel current carryingconductors and the distance between them?A.B.C.D.11 A current carrying conductor in a magnetic field experiences a force of F newtons. Find the force onit if its length is halved and the current flowing in it is doubled?A. 0.5FB. FC. 2FD. 4FHSC Sample Exam Papers and Answers10Science PressMASTERING PHYSICSISBN 978-0-85583-8294
Section 280 marksAttempt Questions 21 to 38Allow about 2 hours and 25 minutes for this partQuestion 21 (3 marks)A satellite, X, is in orbit around the Earth with an orbital radius of R km, in position P as shown in thediagram. In this position it has E joules of gravitational potential energy.PQR2RU –ESarah studied this diagram and then stated that moving this satellite to position Q would halve itsgravitational potential energy, but this change in potential energy would not equal the work done on it,and therefore she had found an example of a situation which violated the law of conservation of energy.Evaluate Sarah’s statement. HSC Sample Exam Papers and Answers14Science PressMASTERING PHYSICSISBN 978-0-85583-8294
Higher School Certificate Sample ExaminationPHYSICSAnswersScience PressMASTERING PHYSICSISBN 978-0-85583-8294175HSC Sample Exam Papers and Answers
PHYSICS Paper 91719BA20D21 At the new position, the gravitational potential Eenergy of the satellite will be because2gravitational energy is inversely proportional tothe orbital radius. This smaller negative valueis actually and an increase in the gravitationalpotential energy of the satellite. Because thesatellite moves to a higher orbit, work mustbe done on it – i.e. energy must be added tothe satellite. It is this energy that increases thegravitational potential energy and therefore the lawof conservation of energy is not violated. Sarah’sstatement is invalid.22 When a vehicle moves round a horizontal curveon a road, the necessary centripetal force neededto keep the car on the road is provided by thefriction between the tyres and the road. If the roadis banked on the curve, then a component of thenormal reaction force on the car acts towards thecentre of the curve and adds to the frictional force,therefore allowing the car to travel at a faster speedthrough the curve.HSC Sample Exam Papers and Answers23 Horizontal component of velocity 150 cos 60 75 m s 1300Therefore, time of flight 4 s75Initial vertical velocity 150 sin 60 129.9 m s 1Vertical velocity as it hits the cliff 4 s later u at 129.9 – 9.8 4 90.7 m s 1 upwards1From s ut at221 (129.9 4) – ( 9.8 16)2 441.2 m above launch point24 (a) The orbital velocity of a satellite is given byGMv0 where M is the mass of the planetrbeing orbited – not the satellites. Therefore, inorder to have the same orbital velocity,the only other variable, r must be the same.(b) Total work done is more than the total energy whenin orbit because work done to put into orbit is thesum of its orbital kinetic energy (positive) and thechange in gravitational potential energy betweenthe surface and the orbital position (positive)whereas total energy is the orbital kinetic energy(positive) plus the gravitational potential energyrelative to the centre of the Earth (negative).(c) Orbital kinetic energy will be more because in alower altitude orbit, orbital velocity will be greater.Gravitational potential energy will be less(greater negative value) because the orbitalradius is less.GMm25 From F r26.67 10 11 150 1508.34 10 7Therefore, r 1.34 m26 The diagrams are showing the magnetic fieldsaround three current carrying conductors. Thesymbolism indicates that the current in P is into thepage, that the current in Q is out of the page as is thatin R (right hand grip rule). The closeness of the fieldlines indicates that IP IR IQ. Only those aroundR have been drawn correctly – becoming furtherapart further from the conductor. The other two setshave been drawn equidistant and do not reflect theweakening field further from the conductors.We get r 176Science PressMASTERING PHYSICSISBN 978-0-85583-8294
energy of the satellite will be _ E 2 because gravitational energy is inversely proportional to the orbital radius. This smaller negative value is actually and an increase in the gravitational potential energy of the satellite. Because the satellite moves to a higher orbit, work must be done on it – i.e
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