Physics (5th Edition)
5th Edition
ISBN: 9780134051802
Author: Walker
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 8PCE
Predict/Explain You drive your car in a straight line at 15 m/s for 10 minutes, then at 25 m/s for another 10 minutes. (a) Is your average speed for the entire trip greater than, less than, or equal to 20 m/s? (b) Choose the best explanation from among the following:
- I. More time is required to drive at 15 m/s than at 25 m/s.
- II. Less distance is covered at 25 m/s than at 15 m/s.
- III. Equal time is spent at 15 m/s and 25 m/s.
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Check out a sample textbook solutionStudents have asked these similar questions
1) If you are initially driving at a speed of 30 km/h with a constant acceleration of 2.0 m/s². Determine
how much time, in seconds, it will take you to reach a speed of 60 km/h?
2) You've decided to take a walk for 15 minutes. You went 250 m due north and turned towards the
east covering another 150 m before you stopped. Compute your average velocity in meters per second, m/s.
3) A car moves with a constant acceleration along a straight line. If after 3.0 seconds its velocity is 10.0
m/s and after 10.0 seconds the velocity is recorded to be 25.0 m/s, then what is its initial speed?
During your car ride, you travel North at a speed of 10 km/hr for 30 minutes and then South at a speed of 10 km/hr for another 30 minutes. Which of the following statements are true?
I. The total distance traveled is zero.
II. The average speed of the entire jog is 10 km/hr.
a. I only.
b. II only.
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d. Neither I nor II
1.
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b) At what time does it have a velocity of 12.0 m/s downward?
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e) What are the magnitude and direction of the acceleration while the ball
is moving upward?
f) What are the magnitude and direction of the acceleration while the ball
is moving downward?
g) What are the magnitude and direction of the acceleration when it is at
the highest point?
Chapter 2 Solutions
Physics (5th Edition)
Ch. 2.1 - For each of the following questions, give an...Ch. 2.2 - The position of an object as a function of time is...Ch. 2.3 - Figure 2-10 shows the position-versus-time graph...Ch. 2.4 - At a certain time, object 1 has an initial...Ch. 2.5 - The equation of motion for an object moving with...Ch. 2.6 - A submerged alligator swims directly toward two...Ch. 2.7 - On a distant, airless planet, an astronaut drops a...Ch. 2 - You take your dog on a walk to a nearby park. On...Ch. 2 - Does an odometer in a car measure distance or...Ch. 2 - An astronaut orbits Earth in the space shuttle. In...
Ch. 2 - After a tennis match the players dash to the net...Ch. 2 - Does a speedometer measure speed or velocity?...Ch. 2 - Is it possible for a car to circle a racetrack...Ch. 2 - For what kinds of motion are the instantaneous and...Ch. 2 - Assume that the brakes in your car create a...Ch. 2 - The velocity of an object is zero at a given...Ch. 2 - If the velocity of an object is nonzero, can its...Ch. 2 - Is it possible for an object to have zero average...Ch. 2 - A batter hits a pop fly straight up. (a) Is the...Ch. 2 - A person on a trampoline bounces straight upward...Ch. 2 - A volcano shoots a lava bomb straight upward. Does...Ch. 2 - Referring to Figure 2-27, you walk from your home...Ch. 2 - In Figure 2-27, you walk from the park to your...Ch. 2 - The two tennis players shown in Figure 2-28 walk...Ch. 2 - The golfer in Figure 2-29 sinks the ball in two...Ch. 2 - A jogger runs on the track shown in Figure 2-30....Ch. 2 - Predict/Calculate A child rides a pony on a...Ch. 2 - Predict/Explain You drive your car in a straight...Ch. 2 - Predict/Explain You drive your car in a straight...Ch. 2 - Usain Bolt of Jamaica set a world record in 2009...Ch. 2 - BIO Kangaroos have been clocked at speeds of 65...Ch. 2 - Rubber Ducks A severe storm on January 10, 1992,...Ch. 2 - Radio waves travel at the speed of light,...Ch. 2 - It was a dark and stormy night, when suddenly you...Ch. 2 - BIO Nerve Impulses The human nervous system can...Ch. 2 - A finch rides on the back of a Galapagos tortoise,...Ch. 2 - You jog at 9.1 km/h for 5.0 km, then you jump into...Ch. 2 - A dog runs back and forth between its two owners,...Ch. 2 - BIO Predict/Calculate Blood flows through a major...Ch. 2 - BIO Predict/Calculate Blood flows through a major...Ch. 2 - In heavy rush-hour traffic you drive in a straight...Ch. 2 - Predict/Calculate An expectant father paces back...Ch. 2 - The position of a particle as a function of time...Ch. 2 - The position of a particle as a function of time...Ch. 2 - Predict/Calculate A tennis player moves back and...Ch. 2 - On your wedding day you leave for the church 30.0...Ch. 2 - The position-versus-time plot of a boat...Ch. 2 - The position of a particle as a function of time...Ch. 2 - The position of a particle as a function of time...Ch. 2 - Predict/Explain On two occasions you accelerate...Ch. 2 - A 747 airliner reaches its takeoff speed of156...Ch. 2 - At the starting gun, a runner accelerates at1.9...Ch. 2 - A jet makes a landing traveling due east with a...Ch. 2 - A car is traveling due north at 23.6 m/s. Find the...Ch. 2 - A motorcycle moves according to the...Ch. 2 - A person on horseback moves according to the...Ch. 2 - Running with an initial velocity of +9.2 m/s, a...Ch. 2 - Predict/Calculate Assume that the brakes in your...Ch. 2 - As a train accelerates away from a station, it...Ch. 2 - A particle has an acceleration of +6.24 m/s2 for...Ch. 2 - Landing with a speed of 71.4 m/s, and traveling...Ch. 2 - When you see a traffic light turn red, you apply...Ch. 2 - A ball is released at the point x = 2 m on an...Ch. 2 - Starting from rest, a boat increases its speed to...Ch. 2 - The position of a car as a function of time is...Ch. 2 - The position of a ball as a function of time is...Ch. 2 - BIO A cheetah can accelerate from rest to 25 0 m/s...Ch. 2 - A sled slides from rest down an icy slope....Ch. 2 - A child slides down a hill on a toboggan with an...Ch. 2 - The Detonator On a ride called the Detonator at...Ch. 2 - Jules Verne In his novel From the Earth to the...Ch. 2 - BIO Bacterial Motion Approximately 0.1% of the...Ch. 2 - Two cars drive on a straight highway. At time t =...Ch. 2 - A Meteorite Strikes On October 9, 1992, a 27-pound...Ch. 2 - A rocket blasts off and moves straight upward from...Ch. 2 - Predict/Calculate You are driving through town at...Ch. 2 - Predict/Calculate You are driving through town at...Ch. 2 - BIO Predict/Calculate A Tongues Acceleration When...Ch. 2 - BIO Surviving a Large Deceleration On July 13,...Ch. 2 - A boat is cruising in a straight line at a...Ch. 2 - A model rocket rises with constant acceleration to...Ch. 2 - The infamous chicken is dashing toward home plate...Ch. 2 - A bicyclist is finishing his repair of a flat tire...Ch. 2 - A car in stop-and-go traffic starts at rest, moves...Ch. 2 - A car and a truck are heading directly toward one...Ch. 2 - Suppose you use videos to analyze the motion of...Ch. 2 - At the edge of a roof you throw ball 1 upward with...Ch. 2 - A cliff diver drops from rest to the water below....Ch. 2 - For a flourish at the end of her act, a juggler...Ch. 2 - Soaring Shaun During the 2014 Olympic games,...Ch. 2 - BIO Gulls are often observed dropping clams and...Ch. 2 - A volcano launches a lava bomb straight upward...Ch. 2 - An Extraterrestrial Volcano The first active...Ch. 2 - BIO Measure Your Reaction Time Heres something you...Ch. 2 - Predict/Explain A carpenter on the roof of a...Ch. 2 - Predict/Explain Figure 2-40 shows a v-versus-t...Ch. 2 - A ball is thrown straight upward with an initial...Ch. 2 - On a hot summer day in the state of Washington...Ch. 2 - Highest Water Fountain The USAs highest fountain...Ch. 2 - Wrongly called for a foul, an angry basketball...Ch. 2 - To celebrate a victory, a pitcher throws her glove...Ch. 2 - Predict/Calculate Standing at the edge of a cliff...Ch. 2 - You shoot an arrow into the air. Two seconds later...Ch. 2 - While riding on an elevator descending with a...Ch. 2 - A hot-air balloon is descending at a rate of 2.3...Ch. 2 - A model rocket blasts off and moves upward with an...Ch. 2 - BIO The southern flying squirrel (Glaucomys...Ch. 2 - Hitting the High Striker A young woman at a...Ch. 2 - While sitting on a tree branch 10.0 m above the...Ch. 2 - An astronaut on the Moon drops a rock straight...Ch. 2 - Taipei 101 An elevator in the Taipei 101...Ch. 2 - A Supersonic Waterfall Geologists have learned of...Ch. 2 - A juggler throws a ball straight up into the air....Ch. 2 - CE At the edge of a roof you drop ball A from...Ch. 2 - CE Two balls start their motion at the same time,...Ch. 2 - CE Refer to the position-versus-time plot in...Ch. 2 - Drop Tower NASA operates a 2.2-second drop tower...Ch. 2 - The velocity-versus-time graph for an object...Ch. 2 - At the 13th green of the U.S. Open you need to...Ch. 2 - A glaucous-winged gull, ascending straight upward...Ch. 2 - A doctor, preparing to give a patient an...Ch. 2 - A hot-air balloon has just lifted off and is...Ch. 2 - Astronauts on a distant planet throw a rock...Ch. 2 - BIO A Jet-Propelled Squid Squids can move through...Ch. 2 - A ball, dropped from rest, covers three-quarters...Ch. 2 - You drop a ski glove from a height h onto fresh...Ch. 2 - To find the height of an overhead power line, you...Ch. 2 - Sitting in a second-story apartment, a physicist...Ch. 2 - Bam!Apollo 15 Lands on the Moon The first word...Ch. 2 - Bam!Apollo 15 Lands on the Moon The first word...Ch. 2 - Bam!Apollo 15 Lands on the Moon The first word...Ch. 2 - Bam!Apollo 15 Lands on the Moon The first word...Ch. 2 - Referring to Example 2-17 Suppose the speeder (red...Ch. 2 - Referring to Example 2-17 The speeder passes the...Ch. 2 - Predict/Calculate Referring to Example 2-21 (a) In...Ch. 2 - Referring to Example 2-21 Suppose the balloon is...
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Position/Velocity/Acceleration Part 1: Definitions; Author: Professor Dave explains;https://www.youtube.com/watch?v=4dCrkp8qgLU;License: Standard YouTube License, CC-BY