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ame: ________________________ Exam 1--PHYS 101--F12 Multiple Choice Identify the choice that best completes the statement or answers the question. ____ ____ 1. What is the area of this paper in square centimeters? a. 6 cm2 c. 600 cm2 2 b. 60 cm d. 6000 cm2 2. Consider this equation. The units for the variables are as follows: (t: s; v: m/s; a: m/s 2; x: m) What must be the units for R if the equation is dimensionally correct? x t =R a v a. ____ s2 m sm c. b. d. 3. Which of these equations is dimensionally correct? 1 m s2 a. x = at c. 2 v= v at b. x2 t 2 a= v d. None of these are dimensionally correct 1 ____ 4. Given this triangle, answer the next two questions: What is the length of the side labeled “x?” ____ a. 7.8 m b. 4.2 m c. 11 m 5. What is the angle θ in the above triangle? d. e. 4.0 m 3.3 m ____ c. 33° a. 31° b. 56° d. 40° 6. Express the result of this mathematical operation with the appropriate significant figures: 35 + 3.24 + 4.5 42 a. b. c. 5.4105 5.410 5.41 d. e. 2 5.4 5 ____ ____ ____ 7. A package is 1.2 × 3.2 × 2.4 feet. What is the volume of the package in cubic centimeters? (1 meter = 3.3 feet) c. 260,000 cm2 a. 280 cm2 2 b. 2,800,000 cm d. 0.3 cm2 8. What are the three basic quantities in mechanics used by physicists to derive additional quantities? a. mass, length, and time c. time, mass, and volume b. area, mass, and charge d. force, area, and time 9. Since 1983 the standard meter has been defined in terms of which of the following? c. distance from the Earth's equator to the a. the distance light travels in 1/3x10 8 second north pole b. wavelength of light emitted by krypton-86 ____ 10. Water flows at a rate of 45 a. 130 cm3 s d. m3 cm3 . What is the flow rate in hr s c. cm3 d. s ____ 11. What is the mass of a typical man in kilograms? b. 4.5x107 a. b. 7 kg 70kg specific alloy bar housed at Sevres, France c. d. 3 cm3 s cm3 13,000 s 3500 700 kg 7000 kg ____ 12. Which of these is not a vector quantity? I. Velocity II. Speed III. Displacement IV. Mass a. II & IV c. I & III b. III & IV d. IV only ____ 13. Consider this plot of position versus time and answer the following 2 questions: What the direction of the velocity? a. east c. unable to tell b. west d. it is not moving ____ 14. For the motion described by the previous plot, what is the direction of the acceleration? a. b. east west c. d. 4 unable to tell it is not accelerating ____ 15. Consider this graph and answer the following 4 questions: What is the velocity at t=30 seconds? a. 2 m/s c. 10 m/s b. 40 m/s d. 30 m/s ____ 16. Estimate the distance traveled between t=30 and t=40 seconds. a. 120 m c. 470 m b. 1000 m d. 50 m ____ 17. What is the instantaneous acceleration at t=45 seconds? a. -4 m/s2 c. 20 m/s2 2 b. 30 m/s d. -2 m/s2 ____ 18. What is the average acceleration for the time interval from t=20 to 60 seconds? a. b. 0 m/s2 10 m/s2 c. d. 5 -4 m/s2 0.3 m/s2 ____ 19. Which of these velocity versus time graphs represents the motion represented in this position versus time graph? b) a) c) d) a. a b. b c. c d. d ____ 20. You throw an object upward at a speed of 22 m/s. How high does it travel? a. 37 m c. 24 m b. 48 m d. 72 m ____ 21. You throw an object upward at a speed of 22 m/s. How long does it take to return back to its original position? a. b. 0.23 s 32 s c. d. 6 2.2 s 4.4 s ____ 22. A drag racer starts her car from rest and accelerates at 3.4 m/s 2 for a distance of 400.0 m (~1/4 mile). What is the speed of the race car at the end of the run? a. 800 m/s d. 25 m/s b. 51 m/s e. 15 m/s c. 120 m/s ____ 23. You throw a ball up into the air and it returns to your hand. Which of these plots best describes the motion of the ball from the moment you release it to the moment you catch it? a. c. b. d. ____ 24. When throwing a ball straight up, which of the following is true about its velocity and acceleration at the highest point in its path? a. v=0 and a=0 d. v≠0, but a=0 e. not enough information b. v=0, but a≠0 c. both v≠0 and a≠0 7 ____ 25. Consider this graph. At what time is the velocity greatest? a. a c. c b. b d. d ____ 26. Consider the previous graph. Where is the velocity negative? a. a c. c b. b d. d ____ 27. You are using Version A of this exam. Please bubble “A” a. A c. C b. B d. D 8 ID: A Exam 1--PHYS 101--F12 Answer Section MULTIPLE CHOICE 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: ANS: C C C E B D C A A D B A A B B C A A D C D B A B C D A PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: PTS: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1