Physics of Everyday Phenomena
9th Edition
ISBN: 9781259894008
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Chapter 2, Problem 4E
A driver drives for 2.5 hours at an average speed of 68 MPH. What distance does she travel in this time?
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Julie drives 91 mi to Grandmother's house. On the way to Grandmother's house, Julie drives half the distance at 36 mph and half the distance at 56 mph. On her return trip, she drives half the time at 36 mph and half the time at 56 mph.
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Chapter 2 Solutions
Physics of Everyday Phenomena
Ch. 2 - Prob. 1CQCh. 2 - Suppose we choose inches as our basic unit of...Ch. 2 - What units would have an appropriate size for...Ch. 2 - A tortoise and a hare cover the same distance in a...Ch. 2 - A driver states that she was doing 80 when stopped...Ch. 2 - Does the speedometer on a car measure average...Ch. 2 - Is the average speed over several minutes more...Ch. 2 - The highway patrol sometimes uses radar guns to...Ch. 2 - Is the term vehicle density (as used in everyday...Ch. 2 - Prob. 10CQ
Ch. 2 - At the front end of a traffic jam, is the vehicle...Ch. 2 - A hockey puck is sliding on frictionless ice. It...Ch. 2 - A ball attached to a string is whirled in a...Ch. 2 - Prob. 14CQCh. 2 - A dropped ball gains speed as it falls. Can the...Ch. 2 - A driver of a car steps on the brakes, causing the...Ch. 2 - At a given instant in time, two cars are traveling...Ch. 2 - A car just starting up from a stop sign has zero...Ch. 2 - A car traveling with constant speed rounds a curve...Ch. 2 - A racing sports car traveling with a constant...Ch. 2 - In the graph shown here, velocity is plotted as a...Ch. 2 - A car moves along a straight line so that its...Ch. 2 - For the car whose distance is plotted against time...Ch. 2 - A car moves along a straight section of road so...Ch. 2 - For the car whose velocity is plotted in question...Ch. 2 - Look again at the velocity-versus-time graph for...Ch. 2 - Suppose the acceleration of a car increases with...Ch. 2 - When a car accelerates uniformly from rest, which...Ch. 2 - The velocity-versus-time graph of an object curves...Ch. 2 - For a uniformly accelerated car, is the average...Ch. 2 - A car traveling in the forward direction...Ch. 2 - A car starts from rest, accelerates uniformly for...Ch. 2 - Suppose that two runners run a 100-meter dash, but...Ch. 2 - Sketch a graph showing velocity-versus-time curves...Ch. 2 - A physics instructor walks with increasing speed...Ch. 2 - Prob. 36CQCh. 2 - Return to example box 2.4, but this time assume...Ch. 2 - A traveler covers a distance of 413 miles in a...Ch. 2 - A walker covers a distance of 2.4 km in a time of...Ch. 2 - Grass clippings are found to have an average...Ch. 2 - A driver drives for 2.5 hours at an average speed...Ch. 2 - A woman walks a distance of 504 m, with an average...Ch. 2 - A person in a hurry averages 70 MPH on a trip...Ch. 2 - A hiker walks with an average speed of 1.3 m/s....Ch. 2 - Prob. 8ECh. 2 - A car travels with an average speed of 65 MPH....Ch. 2 - Starting from rest and moving in a straight line,...Ch. 2 - Starting from rest, a car accelerates at a rate of...Ch. 2 - The velocity of a car decreases from 28 m/s to 20...Ch. 2 - A car traveling with an initial velocity of 16 m/s...Ch. 2 - A runner traveling with an initial velocity of 1.1...Ch. 2 - A car moving with an initial velocity of 32 m/s...Ch. 2 - A runner moving with an initial velocity of 4.0...Ch. 2 - If a world-class sprinter ran a distance of 100...Ch. 2 - Starting from rest, a car accelerates at a...Ch. 2 - A railroad engine moves forward along a straight...Ch. 2 - The velocity of a car increases with time, as...Ch. 2 - A car traveling due west on a straight road...Ch. 2 - A car traveling in a straight line with an initial...Ch. 2 - Just as car A is starting up, it is passed by car...
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- A runner covers a distance of 15.0 m in 6 s to move from x O to x = 4.0 m. What is the average speed of the runner? 1.17 m/s 4.00 m/s 2.50 m/s 0.667 m/sarrow_forwardYou drive your car from home to school at an average speed of 60 kph East for 1 hr and then continue 80 kph North for 1.5 hrs. What is your average velocity for the entire trip?arrow_forward1. A ship steams at a constant velocity of 15 m/s . (a) How far does it travel in a day? (b) How long does it take to travel 500 m? 2. Car moves at 50 m/s for 30s and then at 60 m/s for 2 h. (a) How far did it go? (b) What was its average velocity for the entire trip ?arrow_forward
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- Gaby and her cousin, Fiona, live 45 km apart. Every day, they drive by one another to get to work. Gaby leaves home at 7:00 a.m. and drives at the road speed of 60 km/h. Fiona, however, always leaves home 20 min later and therefore speeds by 10 km/h. Approximately what time will Gaby meet Fiona on the road?arrow_forwardA student drives 40 km south in an attempt to get to a science fair competition before realizing he missed the exit. He turns around and drives back north 15 km before arriving. The total time of travel was 0.75 hr. What is his speed? What is his velocity?arrow_forwardYou need to drive 69.7 km (43.3 miles) for an interview. The interview is at 11:15 am, you leave at 10:00 am and you plan to drive at 100 km/h for the first 30 km, but then it is the 91 you're driving on so of course you hit traffic and have to slow down. For the next 30 km you drive at 40 km/h. What would be the least speed you would need to drive at for the rest of the trip to arrive on time to the interview?arrow_forward
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