Concept explainers
A driver in Massachusetts was sent to traffic court for speeding. The evidence against the driver was that a policewoman observed the driver’s car alongside a second car at a certain moment, and the policewoman had already clocked the second car going faster than the speed limit. The driver argued, “The second car was passing me. I was not speeding.” The judge ruled against the driver because, in the judge’s words, “If two cars were side by side, both of you were speeding.” If you were a lawyer representing the accused driver, how would you argue this case?
Want to see the full answer?
Check out a sample textbook solutionChapter 2 Solutions
University Physics, Volume 2 (Chs. 21-37) (14th Edition)
Additional Science Textbook Solutions
Physics: Principles with Applications
Lecture- Tutorials for Introductory Astronomy
College Physics
Essential University Physics: Volume 2 (3rd Edition)
Applied Physics (11th Edition)
University Physics (14th Edition)
- When the legal speed limit for the New York Thruway was increased from 55 mi/h to 65 mi/h, how much time was saved by a motorist who drove the 700 km between the Buffalo entrance and the New York City exit at the legal speed limit?arrow_forwardA spacecraft starts from rest, and makes a journey to a destination 109000 km from its starting point. It does so by accelerating at a constant rate of 7.56 m/s^2 up to the midpoint of the journey, and then decelerates at the same constant rate of 7.56 m/s^2 for the second half of the journey, ending at rest. How long did the entire journey take? A 4 hr 0 min B 2 hr 0 min C 2 hr 7 min D 1 hr 29 minarrow_forwardYou normally drive on a freeway between San Diego and Los Angeles at an average speed of 105 km/h, and the trip takes 2 h and 20 mins. On a Friday afternoon, however, heavy traffic slows you down and you drive the same distance at an average speed of only 70 km/h. How much longer does the trip take?arrow_forward
- Most important in an investigation of an airplane crash by the U.S. National Transportation Safety Board is the data stored on the airplane’s flight-data recorder, commonly called the “black box” in spite of its orange coloring and reflective tape.The recorder is engineered to withstand a crash with an average deceleration of magnitude 3450 g during a time interval of 6.49 ms. In such a crash, if the recorder and airplane have zero speed at the end of that time interval, what is their speed at the beginning of the interval?arrow_forwardMohammed is driving his car at 80 km/hr speed from Alaya and Ahmed is driving his car at 60 km/hr from Thapti. If both start at the same time, with Ahmed 200 m ahead, the time in which Mohammed catches Ahmed will be a. 3.6036 s b. 360.36 s c. 36.036 s d. 18.018sarrow_forwardArchibald, an aging geezer, is out bicycling one fine afternoon, reliving his glorious youth and oblivious to the world around him. As he approaches a busy intersection, a police officer directing traffic blows his whistle to get Archie’s attention so he’ll slow down and stop. But Archie doesn’t stop; he just speeds right through the intersection as if the traffic cop wasn’t even there. The cop radios one of his colleagues and gets her to stop the old geezer. She gives him a traffic citation for failing to heed the command of a police officer directing traffic. When the case gets to traffic court, Archie explains to the judge that he didn’t hear the officer’s whistle because he is going deaf and cannot hear frequencies above 3000 Hz. The traffic cop informs the judge that his standard issue police whistle emits a frequency of 2100 Hz and he has a certificate to prove it. Thinking quickly (at least for an old geezer) Archie says that it may be true that the police whistle emits a sound…arrow_forward
- A driver in Spain is on a street that has a posted speed limit of vm=75 km/hr and is traveling above the speed limit by vc=28 km/hr. A SUV pulls out of a garage into the street in front of the driver d=24 m in front if of the driver and stops there. The driver immediately brakes and begins decelerating at a rate of ab=4.9 m/s^2. How fast in meters per second is the driver traveling when he hits the SUV in front of him?arrow_forwardA Nozomi Shinkansen train at rest travels from Osaka to Tokyo along a high-speed railroad track which makes a total of 3-hour journey, non-stop. From Osaka station, its distance x is given as a function of time t by the equation x(t)=−αt2+βt3 where α=4.35mihr2 and β=13mihr3. Determine:a) The average and instantaneous velocity of the train as it reaches Tokyo in mph.b) The average and instantaneous acceleration of the train as it reaches Tokyo in mihr2.arrow_forwardAn unidentified flying object (UFO) is observed to travel a total distance of 19000 m, starting and ending at rest, over a duration of 4.23 s. Assuming the UFO accelerated at a constant rate to the midpoint of its journey and then decelerated at a constant rate the rest of the way, what was the magnitude of its acceleration? Express your answer in g s , where 1 g = 9.81 m/s^2.arrow_forward
- Rob drove to the nearest hospital with an average speed of v m/s in t seconds. If he drives home on the same path, but with an average speed of 3v m/s, how long is the return trip home in terms of t?arrow_forwardA hockey player is standing on his skates on a frozen pond when an opposing player, moving with a uniform speed of 12 m/s, skates by with the puck. After 3.0s, the first player makes up his mind to chase his opponent. If he accelerates uniformly at 4.0 m/s, how long does it take him to catch his opponent?arrow_forward1.A spacecraft starts from rest, and makes a journey to a destination 258000 km from its starting point. It does so by accelerating at a constant rate of 11.65 m/s^2 up to the midpoint of the journey, and then decelerates at the same constant rate of 11.65 m/s^2 for the second half of the journey, ending at rest. How long did the entire journey take? 2 hr 37 min 1 hr 51 min 6 hr 9 min 3 hr 5 min 2. An unidentified flying object (UFO) is observed to travel a total distance of 47000 m, starting and ending at rest, over a duration of 1.18 s. Assuming the UFO accelerated at a constant rate to the midpoint of its journey and then decelerated at a constant rate the rest of the way, what was the magnitude of its acceleration? Express your answer in g s , where 1 g = 9.81 m/s^2. 6,882 g s 135,019 g s 67,509 g s 13,763 g s 3. A Ford passes a Toyota on the road (both vehicles are traveling in the same direction). The…arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON