College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
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Textbook Question
Chapter 2, Problem 30P
* Olympic champion swimmer Michael Phelps swam at an average speed of 2.01 m/s during the first half of the time needed to complete a race. What was his average swimming speed during the second half of the race if he tied the record. Which was at an average speed of 2.05 m/s?
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Check out a sample textbook solutionStudents have asked these similar questions
(a) Differentiate between speed and velocity.
(b) The speed versus time graph for an object is shown below:
(i) Describe the motion of the object.
(ii) Calculate the total distance covered by the object in 10 s.
(iii) Calculate the average speed of the object after 10 s.
Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of 444 m/s in 1.83 seconds, then what is the acceleration and what is the distance that the sled travels?
[Please use the following;
†= time
Ax= displacement
Vi=initial velocity
Vf= final velocity
A= acceleration]
Below are four velocity vs. time graphs labeled (i) through (iv). Identify which graph corresponds to each of the following situations. Explain why you chose that graph.
An object at rest
An object moving in the positive direction with a constant speed
An object moving in the negative direction with a constant speed
An object that is accelerating in the positive direction, starting from rest.
Chapter 2 Solutions
College Physics
Ch. 2 - Review Question 2.1 What does the statement...Ch. 2 - Review Question 2.2 Is the following statement...Ch. 2 - Review Question 2.3 Eugenia says that to find the...Ch. 2 - Review Question 2.4 Jade went hiking between two...Ch. 2 - Review Question 2.5 A position- versus-time graph...Ch. 2 - Review Question 2.6 Why is the following statement...Ch. 2 - Review Question 2.7 (a) Give an example in which...Ch. 2 - Review Question 2.8 Explain qualitatively, without...Ch. 2 - Review Question 2.9 A cars motion with respect to...Ch. 2 - Match the general elements or physics knowledge...
Ch. 2 - Which group of quantities below consists only of...Ch. 2 - Which of the following are examples of time...Ch. 2 - A student said. The displacement between my dorm...Ch. 2 - An object moves so that its position depends on...Ch. 2 - 6. Choose the correct approximate...Ch. 2 - Figure Q2.7b shows the position-versus-time graph...Ch. 2 - Oilver takes two identical marbles and drops the...Ch. 2 - 9. Your car is traveling west at 12 m/s. A...Ch. 2 - Which velocity-versus-time graph in Figure Q2.10...Ch. 2 - 11. Azra wants to determine the average speed of...Ch. 2 - A sandbag hangs from a rope attached to a rising...Ch. 2 - An apple falls from a tree. It hits the ground at...Ch. 2 - 14. You have two small metal balls. You drop the...Ch. 2 - Which of the graphs in Figure Q2.15 represent the...Ch. 2 -
16. You throw a small ball upward and notice the...Ch. 2 - Figure Q2.17 shows vectors E,F, and G. Draw the...Ch. 2 - Peter is cycling along an 800-m straight stretch...Ch. 2 - In what reasonable ways can you represent or...Ch. 2 - What is the difference between speed and velocity?...Ch. 2 - 21. What physical quantities do we use to describe...Ch. 2 - 22. Devise stories describing each of the motions...Ch. 2 - 23. For each of the position-versus-time graphs in...Ch. 2 - Figure Q2.24 shows velocity-versus-time graphs for...Ch. 2 - Can an object have a nonzero velocity and zero...Ch. 2 - 26. Can an object at one instant of time have zero...Ch. 2 - 27. Your little sister has a battery-powered toy...Ch. 2 - You throw a ball upward. Your friend says that at...Ch. 2 - A car starts at rest from a stoplight and speeds...Ch. 2 - * You are an observer on the ground. (a) Draw two...Ch. 2 - 3. * A car is moving at constant speed on a...Ch. 2 - 4. * A hat falls off a man’s head and lands in the...Ch. 2 - 5 Figure P2.5 shows several displacement vectors...Ch. 2 - 6. Figure P.26 shows an incomplete motion diagram...Ch. 2 - 7. * You drive 100 Km east do some sightseeing and...Ch. 2 - * Choose an object or reference and a set of...Ch. 2 - The scalar x-component of a displacement vector...Ch. 2 - 10. * You recorded your position with respect to...Ch. 2 - * You need to determine the time interval (in...Ch. 2 - A speedometer reads 65 ml/h. (a) Use as many...Ch. 2 - 13. Convert the following record speeds so that...Ch. 2 - 15. * BIO A kidnapped banker looking through a...Ch. 2 - 16 * Some computer scanners scan documents by...Ch. 2 - 18. * Your friend’s pedometer shows that he took...Ch. 2 - During a hike, two friends were caught in a...Ch. 2 - 20. Light travels at a speed of m/s in a vacuum....Ch. 2 - 21. Proxima Centauri is light-years from Earth....Ch. 2 - * Spaceships traveling to other planets in the...Ch. 2 - 23. ** Figure P2.23 shows a velocity-versus-time...Ch. 2 - 24. * Table 2.9 shows position and time data for...Ch. 2 - 25. * Table 2.10 shows position and time data for...Ch. 2 - 26 * You are walking to your physics class at...Ch. 2 - * Gabriele enters an east-west straight bike path...Ch. 2 - * Jim is driving his car at 32 m/s (72 mi/h) along...Ch. 2 - 29. * You hike two-thirds of the way to the top or...Ch. 2 - 30. * Olympic champion swimmer Michael Phelps swam...Ch. 2 - 31. * A car makes a 100-Km trip. it travels the...Ch. 2 - * Jane and Bob see each other when 100m apart....Ch. 2 - 34. A car starts from rest and reaches the speed...Ch. 2 - A truck is traveling east at +16 m/s (a) The...Ch. 2 - 36. Bumper car collision on a bumper car ride,...Ch. 2 - A bus leaves an intersection accelerating at +2.0...Ch. 2 - A jogger is running at +4.0 m/s when a bus passes...Ch. 2 - 39. * The motion of a person as seen by another...Ch. 2 - While cycling at a speed of 10 m/s, a cyclist...Ch. 2 - * EST To his surprise, Daniel found that an egg...Ch. 2 - 42. BIO Squid propulsion Lolliguncula brevis squid...Ch. 2 - Dragster record on the desert In 1977, Kitty ONell...Ch. 2 - * Imagine that a sprinter accelerates from rest to...Ch. 2 - 45. ** Two runners are running next to each other...Ch. 2 - 46. * Meteorite hits car in 1992, a 14-kg...Ch. 2 - 47. BIO Froghopper jump A spittlebug called the...Ch. 2 - 48. Tennis serve The fastest server in women’s...Ch. 2 - 49. * Shot from a cannon in 1998, David...Ch. 2 - Col. John Stapps final sied run Col. John Stapp...Ch. 2 - 51. * Sprinter Usain Bolt reached a maximum speed...Ch. 2 - ** Imagine that Usain Bolt can reach his maximum...Ch. 2 - * A bus is moving at a speed of 36 km/h. How far...Ch. 2 - * EST You want to estimate how fast your car...Ch. 2 - * In your car, you covered 2.0 m during the first...Ch. 2 - 56. (a) Determine the acceleration of a car in...Ch. 2 - You accidentally drop an eraser out the window of...Ch. 2 - 58. * What is the average speed of the eraser in...Ch. 2 - 59. You throw a tennis ball straight upward. The...Ch. 2 - 60. While skydiving, your parachute opens and you...Ch. 2 - * After landing from your skydiving experience,...Ch. 2 - * You are standing on the rim of a canyon. You...Ch. 2 - 63. * You are doing an experiment to determine...Ch. 2 - EST Cliff divers Divers in Acapulco fall 36m from...Ch. 2 - 65. * Galileo dropped a light rock and a heavy...Ch. 2 - * A person holding a lunch bag is moving upward in...Ch. 2 - * A parachutist falling vertically at a constant...Ch. 2 - A diagram representing the motion of two cars is...Ch. 2 - Use the velocity-versus-time graph lines in Figure...Ch. 2 - * While babysitting their younger brother, Chrisso...Ch. 2 - 72. ** An object moves so that its position...Ch. 2 - * The positions of objects A and B with respect to...Ch. 2 - * Two cars on a straight road at time zero are...Ch. 2 - 75. * Oliver drops a tennis ball from a certain...Ch. 2 - 76. * BIO EST Water striders Water striders are...Ch. 2 - 77. You are traveling in your car at 20 m/s a...Ch. 2 - * You are driving a car behind another car. Both...Ch. 2 - 79. * A driver with a 0.80-s reaction time applies...Ch. 2 - 80. ** Some people in a hotel are dropping water...Ch. 2 - s acceleration if hitting an unprotected zygomatic...Ch. 2 - 82 ** EST A bottle rocket burns for 1.6s. After it...Ch. 2 - 83. * Data from state driver’s manual The state...Ch. 2 - 85. * Car A is heading east at 30 m/s and Car B is...Ch. 2 - BIO Head injuries in sports A research group at...Ch. 2 - BIO Head injuries in sports A research group at...Ch. 2 - BIO Head injuries in sports A research group at...Ch. 2 - BIO Head injuries in sports A research group at...Ch. 2 - BIO Head injuries in sports A research group at...Ch. 2 - Automatic sliding doors The first automatic...Ch. 2 -
Automatic sliding doors The first automatic...Ch. 2 - Automatic sliding doors The first automatic...Ch. 2 - Automatic sliding doors The first automatic...Ch. 2 - Automatic sliding doors The first automatic...Ch. 2 - Automatic sliding doors The first automatic...
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