Review 1-5-New.doc - 1 - Physics 1401 [Chapters 1-5] Review - Chapter 1,2 13. Which of the following is NOT one of the fundamental units in the SI system? A) newton B) meter C) kilogram D) second E) All of the above are fundamental units in the SI system. Ans: A 9. What do the following prefixes mean: “kilo” means “centi” means “micro” means “milli” means “nano” means “mega” means “pico” means 15. The density of seawater was measured to be 1.07 g/cm3. This density in SI units is A) l.07 × 10–3 kg/m3 D) 1.07 × 10–3 kg B) (1/1.07) × 103 kg/m3 E) 1.07 × 103 kg/m3 C) 1.07 × 103 kg Ans: EReview 1-5-New.doc - 2 - 16. To convert a quantity from km/h to m/s, you must A) multiply by 1000 and divide by 60. D) multiply by 3600 and divide by 1000. B) multiply by 1000 and divide by 3600. E) None of these is correct. C) multiply by 60 and divide by 1000. Ans: B 21. In doing a calculation, you end up with a fraction having m/s in the numerator and m/s2 in the denominator. The result will have units of A) m2/s3 B) s–1 C) s3/m2 D) s E) m/s Ans: D 33. Evaluate: (4.0 × 10–6)(3.0 × 104) A) 12 × 1010 B) 1.2 × 10–10 C) 12 × 10–5 D) 1.2 × 10–1 E) 12 × 10–10 Ans: D 34. Evaluate: A) 1.1 × 105 B) 1.7 × 10–4 C) 3.6 × 10–8 D) 4.5 × 105 E) 1.1 Ans: EReview 1-5-New.doc - 3 - 37. When we look up in the sky the Sun appears about as big as the moon; however, we know that the Sun is much further away. Given that the radius of the Sun is about 7 × 108 m and that the radius of the moon is about 2 × 106 m, calculate approximately the number of times the volume of the moon could fit inside the volume of the Sun. A) 4 × 102 B) 4 × 106 C) 4 × 107 D) 1 × 105 E) 2 × 105 Ans: C 1. A particle moves from x1 = 30 cm to x2 = –40 cm. The displacement of this particle is A) 30 cm B) 40 cm C) 70 cm D) –70 cm E) –40 cm Ans: D 3. Four successive displacements of 3 km, 4 km, 5 km, and 4 km are at right angles to each other as shown in the diagram. The magnitude of the resultant displacement is A) 2 km B) 16 km C) 3 km D) 5 km E) None of these is correct. Ans: AReview 1-5-New.doc - 4 - 6. You drive for 30 min at 100 km/h and then stop for 15 min. You then drive for 45 min at 80 km/h. Your average speed for the entire trip is A) 73 km/h B) 83 km/h C) 88 km/h D) 90 km/h E) 97 km/h Ans: A 7. The displacement of an object for a round trip between two locations A) is always greater than zero. B) is always less than zero. C) is zero. D) can be greater than or less than but not equal to zero. E) can have any value. Ans: C 9. An object, located at the origin when t = 0, moves along the x axis as shown in the diagram. At which point is the object farthest from its starting point? A) A B) B C) C D) D E) E Ans: B 10. The graph shows how the position of a particle depends on time. Which choice is closest to the average speed of the particle in the time interval between 0 and 6 s? A) 0.40 m/s B) 0.67 m/s C) 0.75 m/s D) 1.50 m/s E) 2.22 m/s Ans: BReview 1-5-New.doc - 5 - Use the following to answer questions 11-13: 11. Which graph of v versus t best describes the motion of a particle whose velocity is constant and negative? A) 1 B) 2 C) 3 D) 4 E) 5 Ans: B 12. In which graph of v versus t does the particle end up closest to its starting point? A) 1 B) 2 C) 3 D) 4 E) 5 Ans: D 13. In which graph of v versus t does the particle end up farthest from its starting point? A) 1 B) 2 C) 3 D) 4 E) 5 Ans: A 15. Assume that the Deschutes River has straight and parallel banks and that the current is 0.75 m/s. Drifting down the river, you fall out of your boat and immediately grab a piling of the Warm Springs Bridge. You hold on for 40 s and then swim after the boat with a speed relative to the water of 0.95 m/s. The distance of the boat downstream from the bridge when you catch it is A) 67 m B) 90 m C) 78 m D) 54 m E) 120 m Ans: D 17. A river 1.00 mile wide flows with a constant speed of 1.00 mi/h. A woman leaves from a point on the river bank. The woman rows a boat 1.00 mi directly upstream and returns to the starting point. Her speed in still water is 2.00 mi/h. The travel time for the woman is A) 2.00 h B) 1.15 h C) 1.00 h D) 1.33 h E) 0.67 h Ans: DReview 1-5-New.doc - 6 - 19. The graph shows the velocity of a particle as a function of time. In the 12 s shown, the particle travels A) 0 m B) 1200 m C) 640 m D) 440 m E) 200 m Ans: C 20. If the position of an object is plotted vertically on a graph and the time is plotted horizontally, the instantaneous velocity at a particular time is A) the height of the curve at that time. B) the total length of the curve. C) the slope of the tangent to the curve at that time. D) the area under the curve from zero to that time. E) impossible to determine from this type of plot. Ans: C 31. A Ford truck enters a highway and travels at a uniform speed of 50 mph. Half an hour later a Jaguar enters the highway at the same junction and heads in the same direction at 55 mph. How long after the Ford entered the highway does the Jaguar catch up with the truck? A) 5.0 hrs B) 6.0 hrs C) 1.0 hrs D) 1.6 hrs E) 5.5 hrs Ans: E 36. A particle that is moving along a straight line decelerates uniformly from 40 cm/s to 20 cm/s in 5.0 s and then has a constant acceleration of 20 cm/s2 during the next 4.0 s. The average speed over the whole time interval is A) 57 cm/s B) 140 cm/s C) 86 cm/s D) 43 cm/s E) 97 cm/s Ans: DReview 1-5-New.doc - 7 - 39. A particle decelerates uniformly from a speed of 30 cm/s to rest in a time interval of 5.0 s. It then has a uniform acceleration of 10 cm/s2 for another 5.0 s. The particle …