Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 2.5, Problem 2.4QQ
Make a velocity–time graph for the car in Figure 2.1a. Suppose the speed limit for the road on which the car is driving is 30 km/h. True or False? The car exceeds the speed limit at some time within the time interval 0–50 s.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
2.37. A car accelerates from rest on a straight road. A short time later, the car
decelerates to a stop and then returns to its original position in a similar manner, by
speeding up and then slowing to a stop. Which of the following five coordinate versus
time graphs best describes the motion? ch02/image5.jpeg
W K n
さ
||
in
А
IV
=
A honda civic is driven at 20 m/s for 12 mins, then 40 m/s for 20 min, and finally at 50 m/s for 8 min.
a.) calculate the average speed over the interval.
b.) How fast must the honda civic move in the last 8 mins of travel to obtain an average spee of 55 m/s?
George walks to a friend’s house. He walks 750 meters North, then realizes he walked too far. He turns around and walks 250 meters South. The entire walk takes him 13 seconds. What is his speed per second? What is his velocity in meters per second?
I know the answer for the second one, velocity in meters per second is 38.46 m/s. But I'm really confused because since velocity = displacement/time. Displacement = final position - initial position. How can it equal 38.46 m/s since it should be 250 - 750 / t, not 750 - 250 / t?
Please show the formula you use and explain it in an easy to understand way.
Chapter 2 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 2.1 - Which of the following choices best describes what...Ch. 2.1 - Under which of the following conditions is the...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 - Prob. 25PCh. 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 - Prob. 28PCh. 2 - Prob. 29PCh. 2 - At time t = 0, a student throws a set of keys...Ch. 2 - Prob. 31PCh. 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 - Prob. 38APCh. 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 - Prob. 41APCh. 2 - Two thin rods are fastened to the inside of a...Ch. 2 - In a womens 100-m race, accelerating uniformly,...
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 woman backs her van out of her parking space with a constant acceleration of 1.8 m/s2. Assume that her initial motion is in the positive direction. Part A: How long does it take her to reach a speed of 2.1 m/s in seconds? Part B: If she then brakes to a stop in 0.65 s, what is her acceleration in meters per square second?arrow_forwardA stone is thrown straight up from the edge of a roof, 950 feet above the ground, at a speed of 10 feet per second. A. Remembering that the acceleration due to gravity is -32 feet per second squared, how high is the stone 3 seconds later? B. At what time does the stone hit the ground? C. What is the velocity of the stone when it hits the ground? O %23 %24 & 3. 4. 6 7 8 9arrow_forwardA car is moving at a velocity of 20 m/s. The car then accelerates uniformly at 1.8 m/s2. The car continues at the same acceleration until it reaches a velocity of 25 m/s, which is the legal speed limit. What is the distance the car travels in while accelerating?arrow_forward
- A car travels to the left at a steady speed for a few seconds, then brakes for a stop sign. Use the particle model to draw a motion diagram of the car for the entire motion described here. Number the dots in order, starting with zero.arrow_forwardGeorge walks to a friend’s house. He walks 750 meters North, then realizes he walked too far. He turns around and walks 250 meters South. The entire walk takes him 13 seconds. What is his velocity in meters per second? Also, is the acceleration due to gravity negative or positive or it depends? I'm really confused. Please help and explain in an easy to understand.arrow_forwardThe velocity vs. time graph for an object in motion is shown below. What is the total distance traveled by the object? velocity vs time 2.5 2 1.5 1 0.5 1 2 4 5 -0.5 -1 -1.5 time (s) 16 m 4 m 8 m 2 m 3. velocity (m/s) O O Oarrow_forward
- In class, we used a numerical method to determine the velocity of an object at 0s and = t = 2.00 s given that the object had started from rest at t accelerated at a rate given by a(t) = (8.00 m/s^)t². Here's what we did: 1. Divided t into four intervals of 0.5 s each. 2. For each interval, calculated the average a. These were the numerical values we obtained for each time interval: 1 0.25 0.50 i t (s) a; (m/s²) After summing the values according to: 2 0.75 4.50 3 1.25 12.50 lim ã‚At, 2 V₂v₁ = limast. t₁ At→0 we arrived at the approximate value v = 21.0 m/s. 4 1.75 24.50 a (m/s²) 32.00+ 24.00 16.00 8.00 0 ā₁ 0 ā2 az as 0.50 1.00 1.50 2.00 t (s) 21.33 m/s. We then proceeded to integrate to obtain the analytical solution, which was v = Using the same numerical method, divide t into eight and then sixteen intervals to calculate the approximate value for v at t = 2.00 s. This should demonstrate that with more sampling, the AUC (area under the curve) value converges toward the analytical…arrow_forwardA car accelerates uniformly from zero to 12 m/sec^2 in 8 seconds starting from rest. During the next 4 seconds, the car decelerates uniformly at a constant rate of 11 m/sec^2 a. Which of the following gives the velocity of the car after 12 seconds? b. Which of the following gives the distance traveled after 10 seconds? c. Which of the following gives the total distance traveled after 12 seconds?arrow_forwardA stone is thrown vertically upward from the top of a building. If the equation of the motion of the stone is s=-5t^2+30t+200, where s is the directed distance from the ground in meters and t is in seconds. a. What is the height of the building? b. What is the average velocity in the time interval [1,3]c. What is the instantaneous velocity at time t=1?d. At what time will be the stone hit the ground?arrow_forward
- Sketch a position vs time graph, a velocity vs time graph, and an acceleration vs time graph for the situation described below. At time t = 0 you are walking in the positive x direction with a constant speed of 1 m/s. You maintain that speed for 6 s. Then, you decrease your speed uniformly to 0 over a 2 s interval. You rest for 2 s, then turn around and increase your speed uniformly to 2 m/s in 4 s. You continue at that speed until you return to the starting place.arrow_forwardThe motions of a car and a truck along a straight road are represented by the velocity-time graphs in Figure 2.3. The two vehicles are initially alongside each other at time t= 0. Figure 2.3 Trock Car T At time T, what is true of the distances travelled by the vehicles since time t = 0? O A. The car will have travelled further than the truck. O B. The truck will have travelled further than the car. OC. The truck will not have moved. O D. They will have travelled the same distance.arrow_forwardvel while reduc 4. A bus starts from rest at a station and accelerates at a rate of 2 mvs² for 15 s. It then runs at constant speed for 25 s and slows down decelerating at -3 m/s? until it stops at the next station. Find the total distance traveled by the bus.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
University Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSON
Introduction 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 Learning
Lecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-Wesley
College 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