College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 2, Problem 51P
* Sprinter Usain Bolt reached a maximum speed of 11.2 m/s in 2.0 s while running the 100-m dash. (a) What was his acceleration? (b) What distance did he travel during this first 2.0 s of the race? What assumptions did you make? (d) What time interval was needed to complete the race, assuming that he ran the last part of the race at his maximum speed? (e) What is the total time for the race? How certain are you of the number you calculated?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A sprinter accelerates from rest to a top speed with an acceleration whose magnitude is 3.54 m/s². After achieving top speed, he runs
the remainder of the race without speeding up or slowing down. The total race is fifty meters long. If the total race is run in 7.55 s, how
far does he run during the acceleration phase?
Number i
Units
Michael Kik takes his puppy for a walk in the park. Part way through, the puppy spots a squirrel! The puppy bolts off towards the squirrel. The initial velocity of the puppy was 2.4 m/s. During this "burst," the puppy covers a distance of 19 m in a time of 3.2 s.a) What is the acceleration of the puppy?b) How fast is the puppy going after the 3.2 s?
You are driving your car with a velocity of 60.0 km/h on a straight road. At t=0 s, you slow down your car to 30.0 km/h in 6.00 sec. You proceed with this constant velocity for 100. m and then speed up to 60.0 km/h at a rate of 2.80 m/s2.
a) Draw a motion diagram for the whole trip and label it with known quantities
b) Summarize all the known and unknown quantities for all three sections of this trip
c) Calculate the total time elapsed until the car reaches the speed of 60 km/h
Show all work step by step clearly and use correct formula. State the formula used.
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...
Additional Science Textbook Solutions
Find more solutions based on key concepts
The enthalpy of combustion of a gallon (3.8 liters) of gasoline is about 31,000 kcal. The enthalpy of combustio...
An Introduction to Thermal Physics
Elements heavier than uranium in the periodic table do not exist in any appreciable amounts in nature because t...
Conceptual Integrated Science
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective (8th Edition)
13. A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. The plane f...
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Explain all answers clearly, using complete sentences and proper essay structure if needed. An asterisk (*) des...
The Cosmic Perspective Fundamentals (2nd Edition)
7. In Manet’s A Bar at the Folies-Bergere (see Figure Q18.7) the reflection of the barmaid is visible in the mi...
College Physics: A Strategic Approach (4th 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
- Question 7: * A sprinter in a 100m race accelerates uniformly for the first 35 m and then runs with constant velocity. If the sprinter's time for the first 35 m is 5.4 s, determine (a) his acceleration, (b) his final velocity, (c) his time for the race. Write your answer in the form (a. a= m/s^2 ; b. v_f =m/s; c. t= s) Your answerarrow_forwardIarrow_forwardAlmost 80% of all traffic accidents involve distracted driving. Looking at a cell phone text message for even a couple of seconds is very dangerous. A typical human reaction time is 190 milliseconds. Assume a car is traveling at 71 mph. If the maximum deceleration of the car is a constant 8.0 m/s², what will be the stopping distance of the car? Take into account the reaction time. Number i Unitsarrow_forward
- A van (with constant speed 78.3 mile/hr) passes a police car at rest. As the van is 10.0 m ahead ofthe police car, the police start to pursue at a constant acceleration until he catches up the van after 23.3 s.(1 mile = 1609 m, 1 hr = 3600 s)a) Determine the distance traveled by the police car when he caught the van.b) Determine the acceleration of the police cararrow_forwardPost Laboratory Questions 1.) A very fast runner was able to run a 100 m within 9.77 s. At the end of 3.00 s he reached his maximum speed and then maintained that speed until the finish line. Find his acceleration during the first 3.00 s. 2.) Plot the (a) distance vs time t and (b) velocity vs time t in problem no. 1.arrow_forwardA polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, and then returns to its starting point. This trip takes 0.75 hr. a) What was the bear's average speed? b) What was the bear's average velocity?arrow_forward
- a) A world record was set for the men's 100 m dash in the 2008 Olympic Games in Beijing by Usain Bolt of Jamaica. Bolt coasted across the finish line with a time of 9.69 s. If we assume that Bolt accelerated for 3.00 s to reach his maximum speed, and maintained that speed for the rest of the race, calculate his maximum speed and his acceleration. Umar a= b) During the same Olympics, Bolt also set the world record in the 200 m dash with a time of 19.30 s. Using the same assumptions as for the 100 m dash (that is, it took him 3.00 s to reach maximum speed), what was his maximum speed for this race?arrow_forwardA model engine accelerates forward from rest along a straight track at 15.0 m/s2 for 3.0 seconds. It then accelerates forward at 12 m/s2 for 5.0 seconds, and finally decelerates at 8 m/s2 until it stops. Calculate how many seconds the engine was moving. What was its maximum velocity? Find the total distance travelled.arrow_forwardIn Michael Johnson’s world-record 400 m sprint, he ran the first 100 m in 11.20 s; then he reached the 200 m mark after a total time of 21.32 s had elapsed, reached the 300 m mark after 31.76 s, and finished in 43.18 s. a. During what 100 m segment was his speed the highest? b. During this segment, what was his speed in m/s?arrow_forward
- Basam is standing on the edge of a cliff and tosses her physics book upward with a speed of 22.0 m/s. It hits the ground at the base of the cliff 6.0 s later. Create a VELOCITY-TIME graph that represents this scenario. You may assume that the acceleration of the textbook is -9.81 m/s². Use the graph to determine a) the height of the cliff. b) the speed of the book when it impacts the ground. DO NOT use kinematics formulas to solve this problem. This task is assessing your understanding of GRAPHING to represent accelerate motion.arrow_forward** 16. A car accelerates from rest at a rate of 5 m/s², for 5 seconds. It then continues at con- stant speed for 5 more seconds. a) Draw a careful graph of the velocity of the car as a function of time, with enough numerical detail to enable the velocities to be read from your graph. b) Draw a careful graph of the position of the car as a function of time, with enough numerical detail to enable the positions to be read from your graph.arrow_forwardA record of travel along a straight path is as follows: 1. Start from rest with constant acceleration of 2.05 m/s2 for 14.0 s.2. Maintain a constant velocity for the next 2.30 min.3. Apply a constant negative acceleration of −9.41 m/s2 for 3.05 s. (a) What was the total displacement for the trip? Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. m(b) What were the average speeds for legs 1, 2, and 3 of the trip, as well as for the complete trip? leg 1 m/s leg 2 m/s leg 3 m/s complete trip m/sarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Position/Velocity/Acceleration Part 1: Definitions; Author: Professor Dave explains;https://www.youtube.com/watch?v=4dCrkp8qgLU;License: Standard YouTube License, CC-BY