First Examination - S3 Physics P.1. SHATIN TSUNG TSIN SECONDARY SCHOOL FIRST EXAMINATION PHYSICS S3 Date :
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1 5-6 First Examination - S3 Physics P.1 SHATIN TSUNG TSIN SECONDARY SCHOOL FIRST EXAMINATION PHYSICS S3 Date : Full marks : 6 Time allowed : 1 hr. Instructions 1. Answer All Questions on the answer sheets provided. Three marks will be awarded for effective communication in Section B. 3. Calculators are not allowed in this paper Section A: Multiple Choice ( Marks) Choose the best answers and mark on the M.C. Answer Sheet provided. Two or more answers will score NO MARK. 1. The normal procedure of studying physics involves the following steps. Arrange them in proper order. i. Conclusion ii. Data Analysis iii. Data Collection iv. Observation A. i., iii., ii., iv B. iv, iii, ii, i. C. iv., i., iii., ii. D. iii., ii., iv., i.. A man can travel from A to B via three different paths as shown in the figure on the right. Which of the following is correct? A. To be on time, he has to travel faster if he travels via path II. B. The via path II will be the shortest. C. If he wants to arrive at B on time, the speed of his travelling will be the same for the three paths. D. None of the above is correct. A I II III B 3. The following tape was produced by a ticker tape timer in 5 seconds. What is the frequency of the ticker tape timer and how long is one tick time? A. 4 Hz,.5 s B. 4 Hz,.s C. Hz,.5 s D. 1 Hz,.476s 4. The figure on the right shows the -time graph of four particles I, II, III and IV. Which particle is moving with a positive velocity? I A. I B. II C. III D. IV IV II III time 5. Which of the following statements is/are correctly describing the velocity-time graph? i. The graph represents an increasing velocity of a body. ii. iii. The slope of the graph is equal to the velocity. The area S in time t represents the total of a body. A. i. only B. iii. only C. i. and ii. Only D. i. and iii. only velocity S time 6. Which of the following s-t graphs represents an object free falling from 3 rd floor to ground floor? A. B.
2 5-6 First Examination - S3 Physics P. C. D. 7. Which of the following quantities is faster? A. A horse jogged at m min -1 B. A boat sailed at 8.4 m s -1 C. A runner finished 14 cm s -1 D. A car moved at 4 km h The following graph is either a graph of Y against X or a graph of X against Y. Which of the following relationship is possible for the graph? i. Y = 1.5X ii X =. Y iii. Y = 1.5 X + 13 iv. X = 1.74 Y + 5 A. iii. only B. i. and ii. only C. i. and iii. Only D. ii. and iv. Only 9. What is the slope of the graph below? velocity/ (ms -1 ) 8 Time/s 6 A. C. 1 1 m s - B. 1 m s m s - D. 3 m s Which of the following about Prefixes is correct? A. deci< milli<mega<tear B. pico<micro<kilo<giga C. Deci>centi> nano > micro D. Tera > nano> pico> deci Questions refer to the following diagram. velocity /ms time/s
3 5-6 First Examination - S3 Physics P It can be seen from the graph that i. the speed at the time t = s is greater than the speed at the time t = 1 s ii. the car travels with constant speed for some time iii. the car returns to its starting point at the end of the journey. A. i. and ii. only B. i. and iii. only C. ii. and iii. only D. i., ii. and iii. 1. The total travelled by the car is A. 14 m. B. 56 m. C. 8 m. D. 11 m. 13. The average velocity during the first seconds is A. ms -1. B. 4 ms -1. C. 8 ms -1. D. 16 ms -1. Questions A man walks 3 km due South in 1 hour and 3 km due East in the next hour. 14. His total distance travelled is A. 3 km due South East. B. 4 km due South East. C. 6 km. D. 3 km. 15. His total is A. 3 km due South East. B. 6 km due South East. C. 6 km. D. 3 km. 16. His average velocity is A. 3 km/hr. B. 3 km/hr. C. 3 D. 6 km/hr. km/hr. 17. A student walks around a circular path from A to B with uniform speed v. The diameter of the circle is d. Which of the following statements is/are correct? π d i. The distance travelled is. ii. The is d. iii. The average velocity of the student is π d. v A. i. and ii. Only B. i. and iii. only C. ii. and iii. only D. i., ii. and iii. 18. Which of the following graphs represents an object travelling with increasing velocity? A. B. A d B time time C. D. time time 19. Which of the following instruments should be used with a camera? A. Ticker-tape timer B. Timer-Scalar C. Stop-Watch D. Lamp Stroboscope. Which of the following is INCORRECT? A. Velocity is the rate of change of. C. Speed has the same meaning of Velocity. B. The distance measured on a ticker-tape is also the magnitude of the. D. Symbols for both speed and velocity are v.
4 5-6 First Examination - S3 Physics P.4 Section B ( Marks) : Short Questions 1. The following graph is the relationship between two quantities. Read the graph carefully Force/N Extension/cm a) What is the proper name of the graph? (1 mark) b) Describe the relation between the two quantities, Force and Extension. ( marks) c) What is the proportional constant of the graph? ( marks) d) What is the force if the extension is 4 cm? ( marks). In the table below, list two similarities and two differences between speed and velocity. Speed Velocity Similarities Differences (4 marks) 3. A student walked from home to a supermarket. He took 3 minutes to go around a building. He then walked along a 8m long straight street in 1 minute before going into the supermarket. After shopping, he returned home following the same path. 3m home 1m Building 3m 8 m Supermarket a) What is the distance he walked from home to supermarket? ( marks) b) What is the average speed of travel he made from his home to the supermarket? ( marks) c) What is the between his home and the supermarket? ( marks) d) What is the average velocity he made in the trip to the supermarket? ( marks) e) What is the total he has made after returned home? (1 mark)
5 5-6 First Examination - S3 Physics P.5 Section C ( marks) : Long Question. 4. An experiment to find the resistance of a metal wire was done by a form 3 student. The potential differences (V) across the wire and the currents (I) passed through it were listed in the table. Potential difference (V/V) Current (I/mA) a) Plot a graph of V against I on the graph paper provided. (6 marks) b) Find the slope of the graph (3 marks) 5. The following ticker tape was obtained in studying the acceleration due to free falling and is divided into 4 portions. Each portion has the same time interval. The ticker tape timer operated at 5Hz. 4.8 cm 15cm 4 cm 34 cm i) In the following table, fill in the average speed of each time interval. ( marks) Portion no Average speed/ ms -1 ii) Plot a graph of the speed against time on the graph paper provided. (6 marks) iii) **Explain what the meaning of the slope of the graph is. (3 marks) ** Must be answered in complete sentence. -END OF PAPER-
6 5-6 First Examination - S3 Physics P.6 B D A A D C D A B B A C B C A C A D D C Section B ( Marks) : Short Questions 6. The following graph is the relationship between two quantities. Read the graph carefully Force/N Extension/cm e) What is the proper name of the graph? (1 mark) The graph of Force against Extension f) Describe the relation between the two quantities, Force and Extension. ( marks) Force is directly proportional to extension g) What is the proportional constant of the graph? ( marks) Proportional constant = 1/4 =.5 N/cm h) What is the force if the extension is 4 cm? ( marks) F =.5 x 4 = 1 N 7. In the table below, list two similarities and two differences between speed and velocity. Speed Velocity Similarities 1. same symbol, v 1. same symbol, v Differences. same unit m/s 1. scalar. the rate of change in distance. same unit m/s. 1. vector. the rate of change in (4 marks) 8. A student walked from home to a supermarket. He took 3 minutes to go around a building. He then walked along a 8 meter long straight street in 1 minutes before going into the supermarket. After shopping, he returned home following the same path. 3m home 1m Building 3m 8 m f) What is the distance he walked from home to supermarket? ( marks) 4 m g) What is the average speed of travel he made from his home to the supermarket? ( marks) 4 m / (4) = 1 m/s h) What is the between his home and the supermarket? ( marks) = 18 m Supermarket
7 5-6 First Examination - S3 Physics P.7 i) What is the average velocity he made in the trip to the supermarket? ( marks) 18 / 4 = 3/4 m/s j) What is the total he has made after returned home? (1 mark) m
8 5-6 First Examination - S3 Physics P.8 Section C ( marks) : Long Question. 9. An experiment to find the resistance of a metal wire was done by a form 3 student. The potential differences (V) across the wire and the currents (I) passed through it were listed in the table. Potential difference (V/V) Current (I/mA) c) Plot a graph of V against I on the graph paper provided. (6 marks) d) Find the slope of the graph (3 marks) The graph of V against I V/V I/mA The slope of the graph = 3/6 =.5
9 5-6 First Examination - S3 Physics P.9 1. The following ticker tape was obtained in studying the acceleration due to free falling and is divided into 4 portions. Each portion has the same time interval. The ticker tape timer operated at 5Hz. 4.8 cm 15cm 4 cm 34 cm iv) In the following table, fill in the average speed of each time interval. ( marks) Portion no Average speed/ ms v) Plot a graph of the speed against time on the graph paper provided. (6 marks) vi) **Explain what the meaning of the slope of the graph is. (3 marks) The meaning of the slope of the graph is the rate of change of velocity (the change in/of velocity per second, how quick the change of velocity). The graph of Average speed against time Average Speed/ (m/s) time/s The slope means the rate of change in average speed (acceleration) ** Must be answered in complete sentence. -END OF PAPER-
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