Essential University Physics: Volume 1 (3rd Edition)
3rd Edition
ISBN: 9780321993724
Author: Richard Wolfson
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 2, Problem 13E
The standard 26-mile, 385-yard marathon dates to 1908, when the Olympic marathon started at Windsor Castle and finished before the Royal Box at London’s Olympic Stadium. Today’s top marathoners achieve times around 2 hours, 3 minutes for the standard marathon, (a) What’s the average speed of a marathon run in this time? (b) Marathons before 1908 were typically about 25 miles. How much longer does the race last today as a result of the extra mile and 385 yards, assuming it’s run at part (a)’s average speed?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Tom Cogwagee Longboat, of the Six Nations of the Grand River, is one of Ontario's
best known distance runners. In 1907, he set a new Boston Marathon record,
beating all of the previous decade's champions by almost 5 minutes! If he ran the
39.2 km course in 2 hours, 24 minutes and 24 seconds, what was his speed? HINT:
we'll need our units to be metres per second - what do you need to convert in the
question?
0.221 m/s
O 0.272 m/s
O 4.52 m/s
O 17.5 m/s
Some vehicles along super highways in the Philippines run at almost break-neck speed of 80 km/h. What is the speed in miles per hour (mi/h)? Conversion factor: 1.609 km = 1 mile
In 2015, a Japanese high-speed train set a record— traveling at 374 mph during a test run near Mt. Fuji. What is the speed in kilometers per hour (1 mi = 1609 m)? Report your answer as a whole number.
Chapter 2 Solutions
Essential University Physics: Volume 1 (3rd Edition)
Ch. 2.1 - We just described three trips from Houston to Des...Ch. 2.2 - The figures show position-versus-time graphs for...Ch. 2.3 - An elevator is going up at constant speed, slows...Ch. 2.5 - Standing on a roof, you simultaneously throw one...Ch. 2.6 - The graph shows acceleration versus time for three...Ch. 2 - Under what conditions are average and...Ch. 2 - Does a speedometer measure speed or velocity?Ch. 2 - You check your odometer at the beginning of a days...Ch. 2 - Consider two possible definitions of average...Ch. 2 - Is it possible to be at position x = 0 and still...
Ch. 2 - Is it possible to have zero velocity and still be...Ch. 2 - If you know the initial velocity v0 and the...Ch. 2 - Starting from rest, an object undergoes...Ch. 2 - In which of the velocity-versus-time graphs shown...Ch. 2 - If you travel in a straight line at 50 km/h for 1...Ch. 2 - If you travel in a straight line at 50 km/h for 50...Ch. 2 - In 2009, Usain Bolt of Jamaica set a world record...Ch. 2 - The standard 26-mile, 385-yard marathon dates to...Ch. 2 - Starting front home, you bicycle 24 km north in...Ch. 2 - The Voyager 1 spacecraft is expected to continue...Ch. 2 - In 2008, Australian Emma Snowsill set an...Ch. 2 - Taking Earths orbit to be a circle of radius 1.5 ...Ch. 2 - Whats the conversion factor from meters per second...Ch. 2 - On a single graph, plot distance versus time for...Ch. 2 - For the motion plotted in Fig. 2.15, estimate (a)...Ch. 2 - A model rocket is launched straight upward. Its...Ch. 2 - A giant eruption on the Sun propels solar material...Ch. 2 - Starting from rest, a subway train first...Ch. 2 - A space shuttles main engines cut off 8.5 min...Ch. 2 - An egg drops from a second-story window, taking...Ch. 2 - An airplanes takeoff speed is 320 km/h. If its...Ch. 2 - ThrustSSC, the worlds first supersonic car,...Ch. 2 - Youre driving at 70 km/h when you apply constant...Ch. 2 - Prob. 29ECh. 2 - An X-ray tube gives electrons constant...Ch. 2 - A rocket rises with constant acceleration to an...Ch. 2 - Starting from rest, a car accelerates at a...Ch. 2 - A car moving initially at 50 mi/h begins slowing...Ch. 2 - In a medical X-ray tube, electrons are accelerated...Ch. 2 - Californias Bay Area Rapid Transit System (BART)...Ch. 2 - Youre driving at speed v0 when you spot a...Ch. 2 - You drop a rock into a deep well and 4.4 s later...Ch. 2 - Your friend is sitting 6.5 m above you on a tree...Ch. 2 - A model rocket leaves the ground, heading straight...Ch. 2 - A foul ball leaves the bat going straight up at 23...Ch. 2 - A Frisbee is lodged in a tree 6.5 m above the...Ch. 2 - Space pirates kidnap an earthling and hold him on...Ch. 2 - You allow 40 min to drive 25 mi to the airport,...Ch. 2 - A base runner can get from first to second base in...Ch. 2 - You can run 9.0 m/s, 20% faster than your brother....Ch. 2 - A jetliner leaves San Francisco for New York, 4600...Ch. 2 - An objects position is given by x = bt + ct3 where...Ch. 2 - An objects position as a function of time t is...Ch. 2 - In a drag race, the position of a car as a...Ch. 2 - Squaring Equation 2.7 gives an expression for v2....Ch. 2 - During the complicated sequence that landed the...Ch. 2 - The position of a car in a drag race is measured...Ch. 2 - A fireworks rocket explodes at a height of 82.0 m,...Ch. 2 - The muscles in a grasshoppers legs can propel the...Ch. 2 - On packed snow, computerized antilock brakes can...Ch. 2 - A particle leaves its initial position x0 at time...Ch. 2 - A hockey puck moving at 32 m/s slams through a...Ch. 2 - Amtraks 20th-Century Limited is en route from...Ch. 2 - A jetliner touches down at 220 km/h and comes to a...Ch. 2 - A motorist suddenly notices a stalled car and...Ch. 2 - A racing car undergoing constant acceleration...Ch. 2 - The maximum braking acceleration of a car on a dry...Ch. 2 - After 35 min of running, at the 9-km point in a...Ch. 2 - Youre speeding at 85 km/h when you notice that...Ch. 2 - Airbags cushioned the Mars rover Spirits landing,...Ch. 2 - Calculate the speed with which cesium atoms must...Ch. 2 - A falling object travels one-fourth of its total...Ch. 2 - Youre on a NASA team engineering a probe to land...Ch. 2 - Youre atop a building of height h, and a friend is...Ch. 2 - A castles defenders throw rocks down on their...Ch. 2 - Two divers jump from a 3.00-m platform. One jumps...Ch. 2 - A balloon is rising at 10 m/s when its passenger...Ch. 2 - Landing on the Moon, a spacecraft fires its...Ch. 2 - Youre at mission control for a rocket launch,...Ch. 2 - Youre an investigator for the National...Ch. 2 - You toss a book into your dorm room, just clearing...Ch. 2 - Consider an object traversing a distance L, part...Ch. 2 - A particles position as a function of time is...Ch. 2 - Ice skaters, ballet dancers, and basketball...Ch. 2 - Youre staring idly out your dorm window when you...Ch. 2 - A police radars effective range is 1.0 km, and...Ch. 2 - An object starts moving in a straight line from...Ch. 2 - Youre a consultant on a movie set, and the...Ch. 2 - (a) For the ball in Example 2.6, find its velocity...Ch. 2 - Your roommate is an aspiring novelist and asks...Ch. 2 - You and your roommate plot to drop water balloons...Ch. 2 - Derive Equation 2.10 by integrating Equation 2.7...Ch. 2 - An objects acceleration increases quadratically...Ch. 2 - An objects acceleration is given by the expression...Ch. 2 - An objects acceleration decreases exponentially...Ch. 2 - A ball is dropped from rest at a height li0 above...Ch. 2 - A wildlife biologist is studying the hunting...Ch. 2 - A wildlife biologist is studying the hunting...Ch. 2 - A wildlife biologist is studying the hunting...Ch. 2 - A wildlife biologist is studying the hunting...Ch. 2 - A wildlife biologist is studying the hunting...
Additional Science Textbook Solutions
Find more solutions based on key concepts
A wildlife biologist is studying the hunting patterns of tigers. She anesthetizes a tiger and attaches a GPS co...
Essential University Physics (3rd Edition)
BIO Metabolic rate Energy for our activities is provided by the chemical energy of the foods we eat. The absolu...
College Physics
31.57 An L-R-C series circuit consists of a 2.50-?F capacitor, a 5.00-mH inductor, and a 75.0-? resistor connec...
University Physics (14th Edition)
1. When is energy most evident?
Conceptual Physics (12th Edition)
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective
Choose the best answer to etch of the following . Explain your reasoning. 2.Careful study of of community among...
Cosmic Perspective Fundamentals
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Tectonic plates are large segments of the earth's crust that move slowly. Suppose one such plate has an average speed of 3.5 cm per year.(a) What distance does it move in 12 seconds at this speed?m(b) What is its speed in miles per million years?mi/Myarrow_forward1)Tectonic plates are large segments of the Earth's crust that move slowly. Suppose that one such plate has an average speed of 6.0 cm/year. (a)What distance does it move in 1 s at this speed in meters? (b)What is its speed in kilometers per million years?arrow_forwardA tortoise and a hare are competing in a 1200-meter race. The arrogant hare decides to let the tortoise have a 820-meter head start. When the start gun is fired the hare begins running at a constant speed of 8 meters per second and the tortoise begins crawling at a constant speed of 4.5 meters per second. Which of the following formulas expresses the distance between the tortoise and the hare in meters, d, in terms of the number of seconds, t, since the start gun was fired? Od = 820 - 8t Od = 820 + 3.5t Od = 820 - 3.5t Od = 1200 3.5t Od = 1200 - (8t + 4.5t)arrow_forward
- You walk from home due east to school to get a book, and then you walk back west to visit a friend. The figure shows your distance D, in yards, east of home as a function of the time t, in minutes, since you left home. (a) How far away is school? yd(b) At what time do you reach school? The school is first reached in about minutes.(c) At what time(s) are you a distance of 900 yards from home?You are first 900 yards away from home at about minutes and then again at about minutes.(d) Compute the average rate of change in D over the interval from t = 0 to t = 3. yd/minCompute the average rate of change in D over the interval from t = 3 to t = 6. yards per minuteCompute the average rate of change in D over the interval from t = 6 to t = 9. yards per minute(e) How is this related to the shape of the graph over the interval from t = 0 to t = 9? This part of the graph ---Select--- concaves down is a straight line concaves up . (f) At what time are you walking back west the fastest?You…arrow_forwardOn a recent road trip, it took John 2.5 h to drive from a suburb of Phoenix to a small town outside of Yuma. According to his dashboard computer, he averaged 65 mph on the drive. John's friend in Yuma is European, and he asked for the distance that John drove in kilometers. How far did John drive in kilometersarrow_forwardA commuter regularly drives 30 miles from home to work, and the amount of time required for the trip varies widely as a result of road and traffic conditions. The average speed for such a trip is a function of the time required. For example, if the trip takes 2 hours, then the average speed is = 15 miles per hour. (a) What is the average speed if the trip takes an hour and a half? (Round your answer to three decimal places.) mph (b) Find a formula for the average speed s as a function of the time t required for the trip. mph (c) Make the graph of the average speed as a function of the time required. Include trips from 1 hour to 3 hours in length. 250 250 200 200 150 150 100 100 50 01 12 14 1.6 18 2 2.2 24 2.6 2.8 3 01 12 14 1.6 18 2 2.2 24 2.6 2.8 3 250 250 200 200 150 150 100 100 50 50 01 12 14 1.6 1.8 2 22 24 2.6 2.0 3 01 12 14 1.6 18 2 2.2 24 2.6 2.0 3 (d) Is the graph concave up or concave down? O concave up O concave down Explain in practical terms what this means. O As the time…arrow_forward
- You visit the Grand Canyon and drop a rock off the edge of a cliff. The distance ther ock will fall is 16 feet the first second, 48 feet the next second, 80 feet the third second, and so on in an arithmetic sequence. What is the total distance the object will fall in 6 seconds?arrow_forwardWhen running a half marathon (13.1 miles), it took Mark 8 minutes to run from mile marker 1 to mile marker 2, and 18 minutes to run from mile marker 2 to mile marker 4 What was Mark's average speed as he ran from mile marker 1 to mile marker 4?arrow_forwardv(t)A 7 0 1 2 3 45 6 1 Time (in hours) A particle starts out from the origin. Its velocity, in miles per hour, is given by: v(t) = Vi +t, where t is the number of hours since the particle left the origin. How far does the parti- cle travel during the second, third, and fourth hours (from t = 1 to t = 4)? Velocity (in miles per hour)arrow_forward
- You are driving 65.0 miles/hour and you see a police car, so you slow down to 42.5 miles/hour. It takes you 3 seconds to do this. What is your deceleration? (I asked this one before, but someone plugged in -22.5 miles/hr x 2.237 m/s / 1 mile an hour which I didn't understand)arrow_forwardA jet airplane reaches 863 km/h on a certain flight. What distance does it cover in 5.0 minutes? Set the math up. But don't do any of it. Just leave your answer as a math expression.arrow_forwardThe Kentucky Derby is a 2000 m long horse race. The typical winning time is two minutes.What is the average speed, in miles per hour, of a horse that takes two minutes to finish the race?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University
University Physics Volume 1
Physics
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:OpenStax - Rice University
Speed Distance Time | Forces & Motion | Physics | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=EGqpLug-sDk;License: Standard YouTube License, CC-BY