College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 9, Problem 11P
* The speedometer on a bicycle indicates that you travel 60 m while your speed increases from 0 to 10 m/s. The radius of the wheel is 0.30 m. Determine three physical quantities relevant to this motion.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A child rolls a ball on a level floor 4.1 m to another child.
Part A
If the ball makes 7.0 revolutions, what is its diameter?
Express your answer to two significant figures and include the appropriate units.
d = ________
The diagram below is an official schematic of a velodrome, where track cycling takes place. The riders can goaround the track at up to 90 km/h. Assume that a biker is taking the steep turn (with maximum angle as shown) at aspeed of 82 km/h and that the turn has a radius of 25 m.
a. Determine the coefficient of friction required to keep on the track. b. Explain why the track is banked (i.e. explain what would happen if the track were horizontal).
Two physics students are sitting on a spinning merry-go-round. One student measures the time it takes the merry go round to make a full rotation, and shows that the time to make a rotation is remaining constant. He remarks that his acceleration is zero because his speed is remaining constant. Is the student correct or incorrect, and why? *
A) The student is incorrect because an object with circular motion has a velocity that is constantly changing direction.
B) The student is correct because the final speed minus the initial speed divided by the time is the correct relationship for this situation.
C) The student is incorrect because the merry-go-round needs to start and stop every time it goes around the circle, therefore he is accelerating.
D) The student is correct because acceleration must only occur in a straight line.
Chapter 9 Solutions
College Physics
Ch. 9 - Review Question 9.1 Visualize an ice skater...Ch. 9 - Review Question 9.2 A solid wooden ball and a...Ch. 9 - Review Question 9.3 How is Newton’s second law for...Ch. 9 - Review Question 9.4 After a playground...Ch. 9 - Review Question 9.5 Will a can of watery chicken...Ch. 9 - Review Question 9.6 How can you explain the...Ch. 9 - Is it easier to open a door that is made of a...Ch. 9 - 2. You push a child on a swing. Why doesn’t the...Ch. 9 - In terms of the torque needed to rotate your leg...Ch. 9 - Suppose that two bicycles have equal overall mass,...
Ch. 9 - When riding a 10-speed bicycle up a hill, a...Ch. 9 - 6 The objects in Figure Q9.6 are made or two...Ch. 9 - 7. Select all the pairs below in which the two...Ch. 9 - If you turn on a coffee grinding machine sitting...Ch. 9 - A bowling ball is rolling without skidding down an...Ch. 9 - 10. The Mississippi River carries sediment from...Ch. 9 - Two disks are cut from the same uniform board. The...Ch. 9 - A spinning raw egg, if stopped momentarily and men...Ch. 9 - Compare the magnitude of Earth's rotational...Ch. 9 - You lay a pencil on a smooth desk (ignore sliding...Ch. 9 - If you watch the dive of an Olympic diver, you...Ch. 9 - 17. Explain why you do not tip over when riding a...Ch. 9 - Prob. 18CQCh. 9 - 19. Why do tightrope walkers carry long, heavy...Ch. 9 - The sweeping second hand on your wall clock is 20...Ch. 9 - 2. You find an old record player in your attic....Ch. 9 - 3. * Consider again the turntable described in the...Ch. 9 - 4. You step on the gas pedal in your car, and the...Ch. 9 - You pull your car into your driveway and stop. The...Ch. 9 - 6. An old wheat-grinding wheel in a museum...Ch. 9 - Centrifuge A centrifuge at the same museum is used...Ch. 9 - Potters wheel A fly sits on a potters wheel 0.30 m...Ch. 9 - 9. * During your tennis serve, your racket and arm...Ch. 9 - 10. * An ant clings to the outside edge of the...Ch. 9 - 11. * The speedometer on a bicycle indicates that...Ch. 9 - * You pedal your bicycle so that its wheel's...Ch. 9 - Mileage gauge The odometer on an automobile...Ch. 9 - *Speedomter The speedometer on an automobile...Ch. 9 - 15 * Ferns wheel A Ferris wheel starts at rest,...Ch. 9 - 16. * You push a disk-shaped platform tangentially...Ch. 9 - s rotational acceleration would be in ran/s2 if...Ch. 9 - 18. A 0.30-kg ball is attached at the end or a...Ch. 9 - 19. Centrifuge A centrifuge with a rotational...Ch. 9 - Airplane turbine what is the average torque needed...Ch. 9 - * A turntable turn ng at rotational speed 33 rpm...Ch. 9 - 22. * The solid pulley in Figure P9.22 consists...Ch. 9 - * The pulley shown in Figure P9.22 is initially...Ch. 9 - The pulley shown in Figure P9.22 is initially...Ch. 9 - 28. Derive an expression Tor the rotational...Ch. 9 - * Repeat the previous problem for an axis...Ch. 9 - Repeat the previous problem for axis BC, which...Ch. 9 - 31. * Merry-go-round A mechanic needs to replace...Ch. 9 - 32. * A small 0.80-kg train propelled by a fan...Ch. 9 - * Motor You wish to buy a motor that will be used...Ch. 9 - 34. ** A string wraps around a 6.0-kg wheel of...Ch. 9 - * Elena, a black belt in tae kwon do, is...Ch. 9 - Prob. 36PCh. 9 - 37. * Fire escape A unique fire escape for a...Ch. 9 - 38. ** An Atwood machine is shown in Example 9.4 ....Ch. 9 - onTruckandF2onbucket that the rope exerts on the...Ch. 9 - * A thin rod of length L and mass m rotates around...Ch. 9 - 41. * (a) Determine the rotaticnal momentum o’ a...Ch. 9 - Ballet A ballet student with her arms and a leg...Ch. 9 - * A 0.20-kg block moves at the end of a 0.50-m...Ch. 9 - * Puck on a string You attach a 100-g puck to a...Ch. 9 - 0. The student then turns the bicycle wheel over...Ch. 9 - 47. Neutron star An extremely dense neutron star...Ch. 9 - 48. * A boy of mass m is standing on the edge of a...Ch. 9 - 50. A grinding wheel with rotational inertia I...Ch. 9 - * The rotational speed of a flywheel increases by...Ch. 9 - B,/KrotA.Ch. 9 - * Flywheel energy for car The U.S. Department of...Ch. 9 - * Flywheel energy Engineers at the University of...Ch. 9 - 56. ** Rotating student A student sitting on a...Ch. 9 - * A turntable whose rotational inertia is...Ch. 9 - 58. **Repeat the previous problem, only assume...Ch. 9 - * Merry-go-round A carnival merry-go-round has a...Ch. 9 - *Est You hold an apple by its stem between your...Ch. 9 - * Stopping Earths rotation Suppose that Superman...Ch. 9 - BIO EST Punting a football Estimate the tangential...Ch. 9 - * BIO Triceps and darts Your upper arm is...Ch. 9 - 66. * BIO Bowling At the start of your throw of a...Ch. 9 - 67. ** Bio Leg lift You are doing one-leg leg...Ch. 9 - * A horizontal, circular platform can rotate...Ch. 9 - 69. * You have an empty cylindrical metal can and...Ch. 9 - ** in the previous problem, each nut has a mass of...Ch. 9 - 71. * Superball If you give a superball backspin...Ch. 9 - Prob. 72GPCh. 9 - 73. * EST White dwarf A star the size of our Sun...Ch. 9 - Tidal energy Tides are now used so gene-ate...Ch. 9 - Tidal energy Tides are now used so gene-ate...Ch. 9 - Tidal energy Tides are now used so gene-ate...Ch. 9 - Tidal energy Tides are now used so gene-ate...Ch. 9 - Tidal energy Tides are now used so gene-ate...Ch. 9 - Tidal energy Tides are now used so gene-ate...
Additional Science Textbook Solutions
Find more solutions based on key concepts
Your alpine rescue team is using a slingshot to send an emergency medical packet to climbers stranded on a ledg...
Essential University Physics (3rd Edition)
37. (I) A force of 35.0 N is required to start a 6.0-kg box moving across a horizontal concrete floor. (a) What...
Physics: Principles with Applications
Apply the junction rule at point a in Figure 21.52.
College Physics
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective
Which of the two planets (Esus or Sulis) do you think will move around the central star in the least amount of ...
Lecture- Tutorials for Introductory Astronomy
The coefficient of kinetic friction between the block and the surface.
Physics (5th 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
- You are working during your summer break as an amusement park ride operator. The ride you are controlling consists of a large vertical cylinder that spins about its axis fast enough that any person inside is held up against the wall when the floor drops away (Fig. P6.7). The coefficient of static friction between a person of mass m and the wall is s, and the radius of the cylinder is R. You are rotating the ride with an angular speed suggested by your supervisor. (a) Suppose a very heavy person enters the ride. Do you need to increase the angular speed so that this person will not slide down the wall? (b) Suppose someone enters the ride wearing a very slippery satin workout outfit. In this case, do you need to increase the angular speed so that this person will not slide down the wall? Figure P6.7arrow_forwardCasting molten metal is important in many industrial processes. Centrifugal casting is used for manufacturing pipes, bearings, and many other structures. A variety of sophisticated techniques have been invented, but the basic idea is as illustrated in Figure P4.35. A cylindrical enclosure is rotated rapidly and steadily about a horizontal axis. Molten metal is poured into the rotating cylinder and then cooled, forming the finished product. Turning the cylinder at a high rotation rate forces the solidifying metal strongly to the outside. Any bubbles are displaced toward the axis, so unwanted voids will not be present in the casting. Sometimes it is desirable to form a composite casting, such as for a bearing. Here a strong steel outer surface is poured and then inside it a lining of special low-friction metal. In some applications, a very strong metal is given a coating of corrosion-resistant metal. Centrifugal casting results in strong bonding between the layers. Suppose a copper sleeve of inner radius 2.10 cm and outer radius 2.20 cm is to be cast. To eliminate bubbles and give high structural integrity, the centripetal acceleration of each bit of metal should be at least 100g. What rate of rotation is required? State the answer in revolutions per minute.arrow_forwardReview. Assume a certain liquid, with density 1 230 kg/m3, exerts no friction force on spherical objects. A ball of mass 2.10 kg and radius 9.00 cm is dropped from rest into a deep tank of this liquid from a height of 3.30 m above the surface. (a) Find the speed at which the hall enters the liquid. (b) Evaluate the magnitudes of the two forces that are exerted on the ball as it moves through the liquid. (c) Explain why the ball moves down only a limited distance into the liquid and calculate this distance. (d) With what speed will the ball pop up out of the liquid? (c) How does the time interval tdown, during which the ball moves from the surface down to its lowest point, compare with the lime interval tup for the return trip between the same two points? (f) What If? Now modify the model to suppose the liquid exerts a small friction force on the ball, opposite in direction to its motion. In this case, how do the time intervals tdown and tup compare? Explain your answer with a conceptual argument rather than a numerical calculation.arrow_forward
- Casting of molten metal is important in many industrial processes. Centrifugal casting is used for manufacturing pipes, bearings, and many other structures. A cylindrical enclosure is rotated rapidly and steadily about a horizontal axis, as in Figure P7.62. Molten metal is poured into the rotating cylinder and then cooled, forming the finished product. Turning the cylinder at a high rotation rate forces the solidifying metal strongly to the outside. Any bubbles are displaced toward the axis so that unwanted voids will not be present in the casting. Suppose a copper sleeve of inner radius 2.10 cm and outer radius 2.20 cm is to be cast. To eliminate bubbles and give high structural integrity, the centripetal acceleration of each bit of metal should be 100g. What rate of rotation is required? State the answer in revolutions per minute. Figure P7.62arrow_forwardIn a tape recorder, the tape is pulled past the read-write heads at a constant speed by the drive mechanism. Consider the reel from which the tape is pulled: As the tape is pulled off, the radius of the roll of remaining tape decreases, (a) How does the torque on the reel change with time? (b) If the tape mechanism is suddenly turned on so that the tape is quickly pulled with a large force, is the tape more likely to break when pulled from a nearly full reel or from a nearly empty reel?arrow_forwardIn one amusement park ride, riders enter a large vertical barrel and stand against the wall on its horizontal floor. The barrel is spun up and the floor drops away. Riders feel as if they are pinned to the wall by a force something like the gravitational force. This is a fictitious force sensed and used by the riders to explain events in the rotating frame of reference of the barrel. Explain in an inertial frame of reference (Earth is nearly one) what pins the riders to the wall, and identify all of the real forces acting on them.arrow_forward
- Artificial gravity is produced in a space station by rotating it, so it is a noninertial reference frame. The rotation means that there must be a centripetal force exerted on the occupants: this centripetal force is exerted by the walls of the station. The space station in Arthur C. Clarkes 2001: A Space Odyssey is in the shape of a four-spoked wheel with a diameter of 155 m. If the space station rotates at a rate of 2.40 revolutions per minute, what is the magnitude of the artificial gravitational acceleration provided to a space tourist walking on the inner wall of the station?arrow_forwardThe motion of spinning a hula hoop around one's hips can bemodeled as a hoop rotating around an axis not through the center, but offset from the center by an amount h, where h is lessthan R, the radius of the hoop. Suppose Maria spins a hula hoopwith a mass of 0.75 kg and a radius of 0.62 m around her waist.The rotation axis is perpendicular to the plane of the hoop, butapproximately 0.40 m from the center of the hoop. a. What isthe rotational inertia of the hoop in this case? b. If the hula hoopis rotating with an angular speed of 13.7 rad/s, what is its rotational kinetic energy?arrow_forwardTwo children are playing with a roll of paper towels. One child holds the roll between the index fingers of her hands so that it is free to rotate, and the second child pulls at constant speed on the free end of the paper towels. As the child pulls the paper towels, the radius of the roll of remaining towels decreases. (a) How does the torque on the roll change with time? (b) How does the angular speed of the roll change in time? (c) If the child suddenly jerks the end paper towel with a large force, is the towel more likely to break from the others when it is being pulled from a nearly full roll or from a nearly empty roll?arrow_forward
- Suppose you have two eggs, one hard-boiled and the other uncooked. You wish to determine which is the hard-boiled egg without breaking the eggs, which can be done by spinning the two eggs on the floor and comparing the rotational motions, (a) Which egg spins faster? (b) Which egg rotates more uniformly? (c) Which egg begins spinning again after being slopped and then immediately released? Explain your answers to parts (a), (b), and (c).arrow_forwardA car traveling on a flat (unbanked), circular track accelerates uniformly from rest with a tangential acceleration of 1.70 m/s2. The car makes it one-quarter of the way around the circle before it skids off the track. From these data, determine the coefficient of static friction between the car and the track.arrow_forward3. The London Eye Ferris wheel in London, England (duh), has a diameter of 120 m. While the ride is usually very slow and leisurely, Nigel (the operator) has decided to crank it up a bit so that it makes one revolution every 90.0 . (a) Find the linear velocity of the passengers when the Ferris wheel is rotating at this rate. (b) A passenger weighs 945 N at the weight-guessing booth on the ground. What is his apparent weight at the highest and lowest point on the Ferris wheel? (c) What would be the time for one revolution if the passenger's apparent weight at the highest point were zero? (d) What then would be the passenger's apparent weight at the lowest point?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Classical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage Learning
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Classical Dynamics of Particles and Systems
Physics
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Components of a Vector (Part 1) | Unit Vectors | Don't Memorise; Author: Don't Memorise;https://www.youtube.com/watch?v=fwMUELxZ0Pw;License: Standard YouTube License, CC-BY
02 - Learn Unit Conversions, Metric System & Scientific Notation in Chemistry & Physics; Author: Math and Science;https://www.youtube.com/watch?v=W_SMypXo7tc;License: Standard Youtube License