EBK PHYSICS FOR SCIENTISTS AND ENGINEER
10th Edition
ISBN: 8220106906149
Author: Jewett
Publisher: Cengage Learning US
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 2, Problem 4P
An athlete leaves one end of a pool of length L at t = 0 and arrives at the other end at time t1. She swims back and arrives at the starting position at time t2. If she is swimming initially in the positive x direction, determine her average velocities symbolically in (a) the first half of the swim, (b) the second half of the swim, and (c) the round trip. (d) What is her average speed for the round trip?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
An athlete leaves one end of a pool of length L at t = 0 and arrives at the other end at time t,. She swims back and arrives at the starting position at time
t3. If she is swimming initially in the positive x direction, determine her average velocities symbolically in the first half of the swim, the second half of the
swim, and the round trip. (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. Indicate the direction with the sign of your answer.)
(a) the first half of the swim
V avg
(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 =
Need Help?
Read It
8. An athlete leaves one end of a pool of length Lat t- O
and arrives at the other end at time t1. She swims back
and arrives at the starting position at time t2. If she is
swimming initially in the positive x direction, deter-
mine her average velocities symbolically in (a) the first
half of the swim, (b) the second half of the swim, and
(c) the round trip. (d) What is her average speed for
the round trip?
A particle moving in 1D has time-dependent velocity which is given by the quadratic function v(t) = At2 + Bt + C, where A = 4.5 m/s3, B = 3.6 m/s2, and C = −1.7 m/s. a) Find the average acceleration of the particle between t = 0 s and 2.5 s. b) Find the average acceleration of the particle between t = 2.5 s and 5.0 s. c) At what time(s) is the particle at rest?
Chapter 2 Solutions
EBK PHYSICS FOR SCIENTISTS AND ENGINEER
Ch. 2.1 - Which of the following choices best describes what...Ch. 2.2 - Are officers in the highway patrol more interested...Ch. 2.5 - Make a velocitytime graph for the car in Figure...Ch. 2.5 - If a car is traveling eastward and slowing down,...Ch. 2.6 - Which one of the following statements is true? (a)...Ch. 2.7 - In Figure 2.12, match each vxt graph on the top...Ch. 2.8 - Consider the following choices: (a) increases, (b)...Ch. 2 - The speed of a nerve impulse in the human body is...Ch. 2 - A particle moves according to the equation x =...Ch. 2 - The position of a pinewood derby car was observed...
Ch. 2 - An athlete leaves one end of a pool of length L at...Ch. 2 - A positiontime graph for a particle moving along...Ch. 2 - A car travels along a straight line at a constant...Ch. 2 - A person takes a trip, driving with a constant...Ch. 2 - A child rolls a marble on a bent track that is 100...Ch. 2 - Figure P2.9 shows a graph of vx versus t for the...Ch. 2 - (a) Use the data in Problem 3 to construct a...Ch. 2 - A particle starts from rest and accelerates as...Ch. 2 - Draw motion diagrams for (a) an object moving to...Ch. 2 - Each of the strobe photographs (a), (b), and (c)...Ch. 2 - An electron in a cathode-ray tube accelerates...Ch. 2 - A parcel of air moving in a straight tube with a...Ch. 2 - In Example 2.7, we investigated a jet landing on...Ch. 2 - An object moving with uniform acceleration has a...Ch. 2 - Solve Example 2.8 by a graphical method. On the...Ch. 2 - A glider of length moves through a stationary...Ch. 2 - Why is the following situation impossible?...Ch. 2 - A glider of length 12.4 cm moves on an air track...Ch. 2 - In the particle under constant acceleration model,...Ch. 2 - At t = 0, one toy car is set rolling on a straight...Ch. 2 - You are observing the poles along the side of the...Ch. 2 - Why is the following situation impossible? Emily...Ch. 2 - An attacker at the base of a castle wall 3.65 m...Ch. 2 - The height of a helicopter above the ground is...Ch. 2 - A ball is thrown upward from the ground with an...Ch. 2 - A student throws a set of keys vertically upward...Ch. 2 - At time t = 0, a student throws a set of keys...Ch. 2 - You have been hired by the prosecuting attorney as...Ch. 2 - A student drives a moped along a straight road as...Ch. 2 - Automotive engineers refer to the time rate of...Ch. 2 - In Figure 2.11b, the area under the velocitytime...Ch. 2 - The froghopper Philaenus spumarius is supposedly...Ch. 2 - A woman is reported to have fallen 144 ft from the...Ch. 2 - At t = 0, one athlete in a race running on a long,...Ch. 2 - Why is the following situation impossible? A...Ch. 2 - Hannah tests her new sports car by racing with...Ch. 2 - Two objects, A and B, are connected by hinges to a...Ch. 2 - Lisa rushes down onto a subway platform to find...Ch. 2 - Two thin rods are fastened to the inside of a...Ch. 2 - In a womens 100-m race, accelerating uniformly,...
Additional Science Textbook Solutions
Find more solutions based on key concepts
The validity of a scientific law.
The Physical Universe
42. * Insulating a house You insulate your house using insulation rated as R-12, which will conduct 1/12 Btu/h ...
College Physics
The validity of a scientific law.
Physical Universe
GO You testify as an expert witness in a case involving an accident in which car A slid into the rear of car B,...
Fundamentals of Physics Extended
A container ship is 240m long and 22m wide. Assume that the shape is like a rectangular box. How much mass does...
Fundamentals Of Thermodynamics
You have a summer job at your universitys zoology department, where youll be working with an animal behavior ex...
Essential University Physics: Volume 1 (3rd Edition)
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
- A runner practices along a straight line 2000 m long, running back and forth until she returns to the starting point of the course. With the information provided we can ensure when considering the entire route (outbound trip plus return trip): a) During the tour he had a positive average speed, but there is not enough infotmation to infer something about his average speed. b) During the tour he had a positive average speed and his average speed was zero. c) During the trip he had an average speed equal to zero and his average speed was positive. d). We need to know the time it took the runner back and forth to be able to infer something about her average speed and average speed.arrow_forwardOn a one lane road, a person driving a car at v1 = 54 mi/h suddenly notices a truck 0.65 mi in front of him. That truck is moving in the same direction at v2 = 35 mi/h. In order to avoid a collision, the person has to reduce the speed of his car tov2 during time interval Δt. The smallest magnitude of acceleration required for the car to avoid a collision is a. During this problem, assume the direction of motion of the car is the positive direction. Refer to the figure. Part (a) Enter an expression, in terms of defined quantities, for the distance, Δx2, traveled by the truck during the time interval Δt. Part (b) Enter an expression for the distance, Δx1, traveled by the car in terms of v1, v2 and a. Part (c) Enter an expression for the acceleration of the car, a, in terms of v1, v2, and Δt.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_forwardOn a one lane road, a person driving a car at v1 = 58 mi/h suddenly notices a truck 1.1 mi in front of him. That truck is moving in the same direction at v2 = 35 mi/h. In order to avoid a collision, the person has to reduce the speed of his car to v2 during time interval Δt. The smallest magnitude of acceleration required for the car to avoid a collision is a. During this problem, assume the direction of motion of the car is the positive direction. 1. Use the expressions you entered in parts (c) and (f) and enter an expression for a in terms of d, v1, and v2. a = ( v2 - v1 )/Δt Δt = ( 2 ) ( d )/( v1 - v2 ) 2. Calculate the value of a in meters per second squared.arrow_forwardA football player, starting from rest at the line of scrimmage, accelerates along a straight line for a time of 4.60 s. Then, during a negligible amount of time, he changes the magnitude of his acceleration to a value of 1.04 m/s². With this acceleration, he continues in the same direction for another 2.29 s, until he reaches a speed of 6.66 m/s. What is the value of his acceleration (assumed to be constant) during the initial 4.60 -s period? Number Unitsarrow_forwardAt 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_forwardA jogger jogs from one end to the other of a straight track in 1.08 min and then back to the starting point in 1.53 min. What is the jogger's average speed at the following points? (Assume the track is 100 m long.) a in jogging to the far end of the track (b) coming back to the starting point (c) for the total jogarrow_forwardYou are standing on a circular track that is 315 m long. You begin jogging at the start line and keep jogging until you complete one full lap and stop at the same point you started at. - What is the total distance you travel? - What is your final displacement? A world class sprinter ran 200 m in 21.75s. What was her average speed? (m/s)arrow_forwardOn a one lane road, a person driving a car at v1 = 76 mi/h suddenly notices a truck d = 1.9 mi in front of him. That truck is moving in the same direction at v2 = 45 mi/h. In order to avoid a collision, the person has to reduce the speed of his car to v2 during time interval Δt. The smallest acceleration required for the car to avoid a collision is a. During this problem, assume the direction of motion of the car is the positive direction. Refer to the figure below. a)Enter an expression, in terms of defined quantities, for the distance, Δx2, traveled by the truck during the time interval Δt. b)Enter an expression for the distance, Δx1, traveled by the car in terms of v1, v2 and a. c)Enter an expression for the acceleration of the car, a, in terms of v1, v2, and Δt. d)Enter an expression for Δx1 in terms of Δx2 and d when the driver just barely avoids collision. e)Enter an expression for Δx1 in terms of v1, v2, and Δt. f)Enter an expression for Δt in terms of d, v1, and v2. g)…arrow_forwardI am having trouble with an average speed problem. The problem states that a person walks at 4.5 meters per second from point a to b. Then walks back from point b to a at a speed of 3.2 m/s. I know that average speed is displacement/time. However I am not sure how to calculate time or displacement from the two givens. The problem also gives that the average velocity is 0.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
Recommended textbooks for you
- 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
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON
Position/Velocity/Acceleration Part 1: Definitions; Author: Professor Dave explains;https://www.youtube.com/watch?v=4dCrkp8qgLU;License: Standard YouTube License, CC-BY