![FUNDAMENTALS OF PHYSICS (LLF)+WILEYPLUS](https://compass-isbn-assets.s3.amazonaws.com/isbn_cover_images/9781119459132/9781119459132_smallCoverImage.gif)
Concept explainers
To set a speed record in a measured (straight-line) distance d, a race car must be driven first in one direction (in time t1)and then in the opposite direction (in time t2). (a) To eliminate the effects of the wind and obtain the car’s speed vc in a windless situation, should we find the average of d/tl and d/t2 (method 1) or should we divide d by the average of t1 and t2? (b) What is the fractional difference in the two methods when a steady wind blows along the car’s route and the ratio of the wind speed vw to the car’s speed vc is 0.0240?
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
Chapter 2 Solutions
FUNDAMENTALS OF PHYSICS (LLF)+WILEYPLUS
Additional Science Textbook Solutions
Conceptual Physics (12th Edition)
Physics: Principles with Applications
Essential University Physics (3rd Edition)
Conceptual Physics: The High School Physics Program
University Physics Volume 2
Applied Physics (11th Edition)
- A train accelerates uniformly from rest at station A to a maximum speed of 72 km/h. The constant maximum speed is maintained for a period of time and the train then decelerates uniformly until it comes to a stop at station B. The distance between the two railway stations is 22 km and the journey takes 20 minutes. If the magnitude of the acceleration is half that of deceleration, by using the graphical method, determine the acceleration, in meters per second per second, and the time, in minutes, during which the train travels at its maximum speed.arrow_forwardNow let’s apply our definition of average velocity to a swimming competition. During one heat of a swim meet, a swimmer performs the crawl stroke in a pool 50.0 mm long, as shown in (Figure 1). She swims a length at racing speed, taking 24.0 ss to cover the length of the pool. She then takes twice that time to swim casually back to her starting point. Find (a) her average velocity for each length and (b) her average velocity for the entire swim. c) If the swimmer could cross a 15 kmkm channel maintaining the same average velocity as for the first 50 mm in the pool, how long would it take?arrow_forwardAn athlete swims the length L of a pool in a time t, and makes the return trip to the starting position in a time tz. If she is swimming initially in the positive x-direction, determine her average velocities symbolically for the following. (Assume that time t, is from the other end of the pool to the starting point. Use any variable or symbol stated above as necessary. Do not substitute numerical values; use variables only. Indicate the direction with the sign of your answer.) (a) the first half of the swim Vavg (b) the second half of the swim Vavg = (c) the round trip Vavg (d) What is her average speed for the round trip? average speed :arrow_forward
- At an air show, a jet plane has velocity components vx= 695km/h and v y =415km/h at time 4.35 s and v x =938km/h and V y =365km/h at time 7.52s. A)For this time interval, find the xxx component of the plane's average acceleration. b)For this time interval, find the yyy component of the plane's average acceleration. C)For this time interval, find the magnitude of its average acceleration. D)For this time interval, find the direction of its average acceleration.arrow_forwardProblem 2: At t = 0, a truck is traveling east at a constant speed of s = 81 km/h. At an intersection d = 32.9 km ahead, a car is traveling north at constant speed of v = 43.7 km/h Part (a) Write an expression for the distancer between the truck and the car as a function of time. Use the variables from the problem statement for your equation. Expression : r = Select from the variables below to write your expression. Note that all variables may not be required. ß, y, 0, d, g, h, j, k, m, n, P, s, t, v, z Part (b) Write an expression for the time at which the distance between the car and the truck as its minimum value. Use the variables from the problem statement for your equation. Expression : t =arrow_forwardAs a training exercise, a soccer player must run the length of the soccer field (leg 1), then turn around and run back to her starting point (leg 2) without stopping. If the length of the soccer field is L meters, and she runs the leg 1 in t 1 seconds, then turns around and runs leg 2 in t_2 seconds, find the following: (Write your answers using the symbols as they are written in the question.) a) Her average velocity during leg 1 was L/t'1 m-s 1, b) Her average velocity during leg 2 was L/t 2 m-s1. c) Her average velocity over the entire exercise was m-s 1. d) Her average speed during the entire exercise was 2L/t_1+t_2 m-s1. CO3, W31, W32 Ask Dr. Hébert for help.arrow_forward
- Basic kinematics variables using calculus: The velocity of an object is given by the expression v(t) = 3.00 m/s + (4.00 m/s3)t2, where t is in seconds. Determine the position of the object as a function of time if it is located at x = 1.00 m at time t = 0.000 s.arrow_forwardIn physics, one important application of the derivative involves the height of a free – falling object, which can be modeled using the position function. where h is the height of the object in feet, t is the time in seconds, vo is the initial velocity (in feet per second), and ho is the initial height.arrow_forwardA turtle and a rabbit engage in a footrace over a distance of 4000m. The rabbit runs 0.500 km and then stops for a 1.5 hr nap. Upon awakening, he remembers the race and runs twice as fast. Finishing the course in a total time of 1.75 hr, the rabbit wins the race. (a) Calculate the average speed of the rabbit in SI units. (b) What was his average speed in SI units before he stopped for a nap? Assume no detours or doubling back.arrow_forward
- You are instructed to travel 12.0 m and then 10.0 m. You use these instructions such that your distance D from your starting point is maximum. What is the difference between your total distance traveled and distance D?arrow_forwardAn object accelerating at constant acceleration (a) has an initial velocity v0 (at t=0), a velocity v at time t, and goes a particular distance d or x - x0 during the time interval. Derive the expression relating v0, v, a, and d (or x-x0). The relation must not include time. You may use either algebra or calculus.arrow_forwardI throw a ball straight up in the air. It travels straight up 2 meters and then straight back down where I catch it at the same height it was released from. The distance the ball has traveled is meters. The displacement of the ball is meters. (use the proper number of sig figs in your answer given the provided information).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
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305952300/9781305952300_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780133969290/9780133969290_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781107189638/9781107189638_smallCoverImage.jpg)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337553278/9781337553278_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780321820464/9780321820464_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780134609034/9780134609034_smallCoverImage.gif)