Additional Science Unit Physics P2. Physics Unit Physics P2 PH2FP. (JAn13PH2Fp01)

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1 Centre Number Surname Candidate Number For Examiner s Use Other Names Candidate Signature Examiner s Initials Additional Science Unit Physics P2 Physics Unit Physics P2 Friday 25 January 2013 For this paper you must have: a ruler a calculator the Physics Equations Sheet (enclosed). Time allowed 1 hour General Certificate of Secondary Education Foundation Tier January pm to 2.30 pm PH2FP Instructions Use black ink or black ball-point pen. Fill in the es at the top of this page. Answer all questions. You must answer the questions in the spaces provided. around each page or on blank pages. Do all rough work in this book. Cross through any work you do not want to be marked. Information The marks for questions are shown in brackets. The maximum mark for this paper is 60. You are expected to use a calculator where appropriate. Question 9 (c) should be answered in continuous prose. In this question you will be marked on your ability to: use good English organise information clearly use specialist vocabulary where appropriate. Advice In all calculations, show clearly how you work out your answer. F Question TOTAL Mark (JAn13PH2Fp01) G/K /6/6/6 PH2FP

2 2 Answer all questions in the spaces provided. 1 (a) The diagram shows two forces acting on an object. 2 N 6 N What is the resultant force acting on the object? Tick ( ) one. 8 N to the right 8 N to the left 4 N to the right 4 N to the left 1 (b) BASE jumpers jump from very high buildings and mountains for sport. The diagram shows the forces acting on a BASE jumper in flight. The BASE jumper is wearing a wingsuit. C B A D (02)

3 3 1 (b) (i) Draw a ring around the correct answer in the to complete each sentence. smaller than The BASE jumper accelerates forwards when force A is equal to bigger than force B. The BASE jumper falls with a constant speed when force C is 1 (b) (ii) To land safely the BASE jumper opens a parachute. smaller than equal to bigger than force D. (2 marks) Parachute What effect does opening the parachute have on the speed of the falling BASE jumper? Give a reason for your answer. (2 marks) 5 Turn over (03)

4 4 2 (a) Sources of background radiation are either natural or man-made. Which two of the sources listed in the are natural sources of background radiation? Draw a ring around each of your answers. cosmic rays nuclear accidents X-rays radon gas (2 marks) 2 (b) A teacher used a Geiger-Műller (GM) tube and counter to measure the background radiation in her laboratory. The teacher reset the counter to zero, waited one minute and then took the count reading. The teacher repeated this two more times. The three readings taken by the teacher are given in the table. Counter Count Geiger-Műller (GM) tube 2 (b) (i) The three readings are different. What is the most likely reason for this? Tick ( ) one. The teacher did not reset the counter to zero. Radioactive decay is a random process. The temperature in the laboratory changed. 2 (b) (ii) Calculate the mean (average) value of the three readings given in the table. Mean (average) value =... counts (04)

5 5 2 (b) (iii) The diagram shows how the teacher used the GM tube and counter to measure the radiation emitted from a radioactive source. The counter was reset to zero. The count after one minute was 159. Counter 0159 Radioactive source GM tube Calculate how many counts were due to the radiation from the radioactive source. Counts due to the radiation from the radioactive source =... 2 (b) (iv) The teacher then put a powerful magnet between the radioactive source and the GM tube. The counter was reset to zero. The number on the counter shows the count after one minute N Radioactive source S Magnet What type of radiation was being emitted from the radioactive source? Draw a ring around your answer. alpha beta gamma Explain the reason for your answer. (3 marks) Turn over (05)

6 6 2 (c) At the end of the lesson the teacher put the radioactive source back inside its storage. Lead lining Storage Why is the inside of the lined with lead? 2 (d) Which one of the following questions cannot be answered by scientific study? Tick ( ) one. Where does background radiation come from? What is meant by the half-life of a radioactive source? Should radioactive waste be dumped in the oceans? 10 (06)

7 7 Turn over for the next question DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED Turn over (07)

8 8 3 (a) Electrical circuits often contain resistors. The diagram shows two resistors joined in series. 10 Ω 15 Ω Calculate the total resistance of the two resistors. Total resistance =... Ω 3 (b) A circuit was set up as shown in the diagram. The three resistors are identical. 6 V V 3 (b) (i) Calculate the reading on the voltmeter. Reading on voltmeter =... V (2 marks) (08)

9 9 3 (b) (ii) The same circuit has now been set up with two ammeters. 6 V A 1 A 2 V Draw a ring around the correct answer in the to complete the sentence. smaller than The reading on ammeter A 2 will be equal to greater than the reading on ammeter A 1. 4 Turn over for the next question Turn over (09)

10 10 4 (a) The diagram shows the information plate on an electric kettle. The kettle is plugged into the a.c. mains electricity supply. 230 V 2760 W 50 Hz Use the information from the plate to answer the following questions. 4 (a) (i) What is the frequency of the a.c. mains electricity supply? 4 (a) (ii) What is the power of the electric kettle? 4 (b) To boil the water in the kettle, 2400 coulombs of charge pass through the heating element in 200 seconds. Calculate the current flowing through the heating element and give the unit. Use the correct equation from the Physics Equations Sheet. Choose the unit from the list below. amps volts watts Current =... (3 marks) (10)

11 11 4 (c) The amount of charge passing through the heating element of an electric kettle depends on the time the kettle is switched on Charge in coulombs Time the kettle is switched on in seconds What pattern links the amount of charge passing through the heating element and the time the kettle is switched on? (2 marks) 7 Turn over (11)

12 12 5 (a) A student uses some everyday items to investigate static electricity. Cloth Plastic strip Wooden rod 1 A strip of plastic is cut from a plastic carrier bag 2 The plastic strip is rubbed with a cloth 3 The plastic strip is hung over a wooden rod 5 (a) (i) Draw a ring around the correct answer in the to complete each sentence. Rubbing the plastic strip with a cloth causes the strip to become negatively charged. electrons This happens because neutrons protons move from the cloth onto the plastic strip. The cloth is left with a negative a positive zero charge. (2 marks) 5 (a) (ii) When the plastic strip is hung over the wooden rod, the two halves of the strip move equally away from each other. What two conclusions should the student make about the forces acting on the two halves of the plastic strip? (2 marks) (12)

13 13 5 (b) Electrical charges move more easily through some materials than through other materials. Through which one of the following materials would an electrical charge move most easily? Draw a ring around your answer. aluminium glass rubber 5 Turn over for the next question Turn over (13)

14 14 6 Some students designed and built an electric-powered go-kart. The go-kart is shown below. 6 (a) Suggest two changes that could be made to the design of the go-kart to increase its top speed (2 marks) 6 (b) A go-kart with a new design is entered into a race. The velocity-time graph for the go-kart, during the first 40 seconds of the race, is shown below. 15 D E 10 Velocity in metres per second 5 B C A Time in seconds (14)

15 15 6 (b) (i) Between which two points did the go-kart have the greatest acceleration? Tick ( ) one. A B B C C D Give a reason for your answer. (2 marks) 6 (b) (ii) The go-kart travels at a speed of 13 m/s between points D and E. The total mass of the go-kart and driver is 140 kg. Calculate the momentum of the go-kart and driver between points D and E. Use the correct equation from the Physics Equations Sheet. Momentum =... kg m/s (2 marks) 6 Turn over for the next question Turn over (15)

16 16 7 The diagram shows the structure of an atom. Neutron Nucleus Electron Proton Not drawn to scale 7 (a) In 1931 scientists thought that atoms contained only protons and electrons. Suggest what happened in 1932 to change the idea that atoms contained only protons and electrons. 7 (b) The table gives information about the particles in an atom. Complete the table by adding the names of the particles. Particle Relative Mass Relative Charge 1 0 very small (2 marks) 3 (16)

17 17 Turn over for the next question DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED Turn over (17)

18 18 8 A car has an oil leak. Every 5 seconds an oil drop falls from the bottom of the car onto the road. 8 (a) What force causes the oil drop to fall towards the road? 8 (b) The diagram shows the spacing of the oil drops left on the road during part of a journey from A to B. A B Describe the motion of the car as it moves from A to B. Explain the reason for your answer. (3 marks) 8 (c) When the brakes are applied, a braking force slows down and stops the car. 8 (c) (i) The size of the braking force affects the braking distance of the car. State one other factor that affects the braking distance of the car. (18)

19 19 8 (c) (ii) A braking force of 3 kn is used to slow down and stop the car in a distance of 25 m. Calculate the work done by the brakes to stop the car and give the unit. Use the correct equation from the Physics Equations Sheet. Work done =... (3 marks) 8 Turn over for the next question Turn over (19)

20 20 9 Stars go through a life cycle. About 90 % of all stars are in the main sequence period of the life cycle. 9 (a) Stars are stable during the main sequence period of the life cycle. Why? 9 (b) The table gives an estimated time for the number of years that three stars, X, Y and Z, will be in the main sequence period of their life cycle. Star Relative mass of the star compared to the Sun Estimated main sequence period in millions of years X Y Z (b) (i) This data suggests that there is a pattern linking the mass of a star and the number of years the star is in the main sequence period of its life cycle. What is the pattern suggested by the data? 9 (b) (ii) Scientists cannot give the exact number of years a star will be in the main sequence period. Suggest why. (20)

21 21 9 (b) (iii) Nuclear fusion is the process by which energy is released in stars. Which one of the following can be concluded from the data in the table? Draw a ring around the correct answer in the to complete the sentence. faster than The rate of nuclear fusion in a large star is the same as slower than in a small star. Explain the reason for your answer. (3 marks) Question 9 continues on the next page Turn over (21)

22 22 9 (c) In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate. Describe what happens to a star much bigger than the Sun, once the star reaches the end of the main sequence period of its life cycle. Your answer should include the names of the stages the star passes through. (6 marks) 12 END OF QUESTIONS (22)

23 23 There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED (23)

24 24 There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED Copyright 2013 AQA and its licensors. All rights reserved. (24)

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