Concept explainers
A model plane flew 100 m in 25.0 s followed by another 240 m in an additional 60.0 s,
whereupon it crashed into the ground. How far did it travel in total? How long was it in
the air? What was its average speed? [Hint: The overall average is not equal to the
average of the averages. When you have several segments in a problem, label them like
this:
Want to see the full answer?
Check out a sample textbook solutionChapter 1 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Additional Science Textbook Solutions
The Cosmic Perspective Fundamentals (2nd Edition)
The Physics of Everyday Phenomena
Fundamentals Of Physics - Volume 1 Only
MODERN PHYSICS (LOOSELEAF)
Life in the Universe (4th Edition)
- The Shinkansen (bullet train in Japan) makes a trip from Tokyo Station to Kyoto station in 2.0 hours and 14 min. The distance traveled is 460 km (to two significant figures). Determine the average velocity of the train in meters per second (m/s). [conversions: 1 km = 1000 m, 1 hr = 3600 s, 1 min = 60 sarrow_forwardTo burn the fats she accumulated during the lockdown, Katie walks south at a speed of 2.00 m/s for 60.0 minutes. She then turns around and walks north a distance 3000 m in 25.0 minutes. What is her total distance covered?arrow_forwardBay City and Vernonville are 128 miles apart. A car leaves Bay City traveling towards Vernonville, and another car leaves Vernonville at the same time, traveling towards Bay City. The car leaving Bay City averages 10 miles per hour more than the other, and they meet after 1 hour and 36 minutes. What are the average speeds of the cars? The car leaving Bay City averages what mph? The car leaving Vernonville averages what mph?arrow_forward
- An object is dropped from rest and takes 2.25 seconds to reach the ground below. From what distance above the ground was it dropped? State this as a positive number and assume it has proper SI Units.arrow_forwardA pilot flies in a straight path for 1 h 30 min. She then makes a course correction, heading 10° to the right of her original course, and flies 2 h in the new direction. If she maintains a constant speed of 500 mi/h, how far is she from her starting position? (Round your answer to the nearest mile.)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
- A person takes a trip, driving with a constant speed of 96.5 km/h, except for a 20.0-min rest stop. The person's average speed is 67.0 km/h. (a) How much time is spent on the trip? 1.03 Your incorrect answer may have resulted from roundoff error. Make sure you keep extra significant figures in intermediate steps of your calculation. h (b) How far does the person travel? 67.23 Your incorrect answer may have resulted from roundoff error. Make sure you keep extra significant figures in intermediate steps of your calculation. kmarrow_forwardA car accelerates with a constant acceleration of 1.2 m · s-2 along a long straight road. How long does it take the car to accelerate from 100 kph to 110 kph, and how far does it travel while doing so? [Hint: watch your units and your significant figures. Because there is no other information, take the speeds as three significant figures.] It takes seconds to accelerate to 110 kph. While accelerating, the car travels m. Separate your answers with a comma. Example: a, barrow_forwardA student drops an object out the window of the top floor of a high-rise dormitory. (a) Neglecting air resistance, how fast is the object traveling when it strikes the ground at the end of 3.9 s? First used standard British units and then express the speed in mi/h for a familiar comparison. (ft/s and mi/h) (b) How far, in meters, does the object fall during the 3.9 s? Comment on how many floors the dormitory probably has. (Assume that there are 32 floors/100 m.)arrow_forward
- A rock is thrown directly upward with an initial velocity of 118 feet per second from a cliff 275 feet above a beach. The height of the rock above the ground h after t seconds, is given by the equation h=−16t2+118t+275. When will the rock be 446 feet above the ground? If you have more than one answer, separate them with a comma. If necessary, round to 2 decimal places.arrow_forwardA particle journeyed 80 miles between point 1 and point 2 at 40 mi/h and then another 120 miles between point 2 and point 3 at 70 mi/h. How much time did it take the particle to travel from point 1 to point 3?arrow_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
- 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