Physics (5th Edition)
5th Edition
ISBN: 9780321976444
Author: James S. Walker
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 11.1, Problem 1EYU
A bicycle wheel is mounted on an axle, as shown in Figure 11-7. Rank the four forces of equal magnitude (F1, F2, F3, F4) in order of the torque they produce, from most negative to most positive. Indicate ties where appropriate.
Figure 11-7 Enhance Your Understanding 1.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
PLEASE PUT SOLUTION (WHY) // WHY THE REASON OF THAT ANSWER (?)
1. What should be done to increase the generated torque on a bar, with one end fixed to a point, without increasing the applied force?
A. Make the moment arm shorter.
B. Increase the weight of the moment arm.
C. Move the axis of rotation closer to the point where force is applied.
D. Increase the length of the moment arm.
2. How will the generated torque change if you move the axis of rotation from the middle of a bar to its left end, given that the applied force is applied at its right end?
A. Torque will be doubled.
B. Torque will increase 1.5
times the original.
C. Torque will remain the same.
D. Torque will be halved.
Please help me! A uniform beam of weight 12 N and length 10 m is mounted by a small hinge on a wall. The beam is held in a horizontal position by a vertical rope at the location as shown. (I attached a picture of the diagram)
A.) What is the gravitational torque about the beam's left end, in N·m? (Pay attention to the sign.)
B.) What is the torque by the tension force about the beam's left end, in N·m? (Pay attention to the sign.)
C.) What is the magnitude of the tension force in the rope, in Newtons?
Answer the following concisely, in no more than three sentences.
1. A massless wire connects two masses, one of which is exactly twice the other. If theconnecting wire has length L, should a support be placed at a distance L/3 from the largermass to achieve equilibrium? The mass of the wire is assumed to be negligible.
2. Are projectiles subject to constant acceleration in two dimensions?
3. Explain in detail why a spinning ice-skater's angular speed increases when she pulls in herarms closer to her body.
4. Stand facing the edge of an open door, one foot on each side of the door. You will find thatyou are not able to stand on your toes. Why?
5. Two identical pool balls are shot directly at one another at the same speed. Describe the ball'smotions after they collide, assuming that frictional forces may be neglected and the collisionis completely elastic.
Chapter 11 Solutions
Physics (5th Edition)
Ch. 11.1 - A bicycle wheel is mounted on an axle, as shown in...Ch. 11.2 - Consider two objects with the following...Ch. 11.3 - A Physics sign is supported symmetrically by two...Ch. 11.4 - A mobile made from three piggy banks (A, B, C) is...Ch. 11.5 - Prob. 5EYUCh. 11.6 - Consider two objects with the following...Ch. 11.7 - Prob. 7EYUCh. 11.8 - In system 1, a torque of 20 N m acts through an...Ch. 11.9 - The angular velocity of the spinning bicycle wheel...Ch. 11 - Two forces produce the same torque. Does it follow...
Ch. 11 - A car pitches down in front when the brakes are...Ch. 11 - A tightrope walker uses a long pole to aid in...Ch. 11 - When a motorcycle accelerates rapidly from a stop...Ch. 11 - Give an example of a system in which the net...Ch. 11 - Give an example of a system in which the net force...Ch. 11 - Is the normal force exerted by the ground the same...Ch. 11 - Give two everyday examples of objects that are not...Ch. 11 - Give two everyday examples of objects that are in...Ch. 11 - Can an object have zero translational acceleration...Ch. 11 - Stars form when a large rotating cloud of gas...Ch. 11 - What purpose does the tail rotor on a helicopter...Ch. 11 - Is it possible to change the angular momentum of...Ch. 11 - Suppose a diver springs into the air with no...Ch. 11 - To tighten a spark plug, it is recommended that a...Ch. 11 - Pulling a Weed The gardening tool shown in Figure...Ch. 11 - A person slowly lowers a 3.6-kg crab trap over the...Ch. 11 - A squirrel-proof bird feeder has a lever that...Ch. 11 - At one position during its cycle, the foot pushes...Ch. 11 - BIO Predict/Calculate Force to Hold a Baseball A...Ch. 11 - At the local playground, a 21-kg child sits on the...Ch. 11 - Predict/Explain Consider the pulley-block systems...Ch. 11 - Suppose a torque rotates your body about one of...Ch. 11 - A torque of 0.97 N m is applied to a bicycle...Ch. 11 - When a ceiling fan rotating with an angular speed...Ch. 11 - When the play button is pressed, a CD accelerates...Ch. 11 - A person holds a ladder horizontally at its...Ch. 11 - A 0.180-kg wooden rod is 1.25 m long and pivots at...Ch. 11 - Predict/Calculate A wheel on a game show is given...Ch. 11 - The L-shaped object in Figure 11-41 consists of...Ch. 11 - The L-shaped object described in the previous...Ch. 11 - A motorcycle accelerates from rest, and both the...Ch. 11 - Predict/Calculate A torque of 13 N m is applied...Ch. 11 - Predict/Explain Suppose the person in Example...Ch. 11 - A string that passes over a pulley has a 0.321-kg...Ch. 11 - To loosen the lid on a jar of jam 7.6 cm in...Ch. 11 - BIO Predict/Calculate Referring to the person...Ch. 11 - Prob. 24PCECh. 11 - Prob. 25PCECh. 11 - Predict/Calculate A schoolyard teeter-totter with...Ch. 11 - A 0.122-kg remote control 23.0 cm long rests on a...Ch. 11 - Predict/Calculate A 0.16-kg meterstick is held...Ch. 11 - Prob. 29PCECh. 11 - A uniform metal rod, with a mass of 2.0 kg and a...Ch. 11 - Prob. 31PCECh. 11 - In Figure 11-46 two acrobats perform a balancing...Ch. 11 - BIO Forces in the Foot In Figure 11-47 we see the...Ch. 11 - A stick with a mass of 0.214 kg and a length of...Ch. 11 - Prob. 35PCECh. 11 - If the cat in Example 11-9 has a mass of 3.9 kg,...Ch. 11 - Prob. 37PCECh. 11 - Maximum Overhang Three identical, uniform books of...Ch. 11 - A baseball bat balances 71.1 cm from one end. If a...Ch. 11 - A 2.85-kg bucket is attached to a rope wrapped...Ch. 11 - A child exerts a tangential 53 4-N force on the...Ch. 11 - Predict/Calculate You pull downward with a force...Ch. 11 - One elevator arrangement includes the passenger...Ch. 11 - Atwood's Machine An Atwoods machine consists of...Ch. 11 - A 1.4-kg bicycle tire with a radius of 33 cm...Ch. 11 - Jogger 1 in Figure 11-51 has a mass of 65.3 kg and...Ch. 11 - Predict/Calculate Suppose jogger 3 in Figure 11-51...Ch. 11 - A torque of 0.12 N m is applied to an egg beater...Ch. 11 - A windmill has an initial angular momentum of 8500...Ch. 11 - Two gerbils run in place with a linear speed of...Ch. 11 - Predict/Explain A student rotates on a...Ch. 11 - A puck on a horizontal, frictionless surface is...Ch. 11 - A puck on a horizontal, frictionless surface is...Ch. 11 - As an ice skater begins a spin, his angular speed...Ch. 11 - A disk-shaped merry-go-round of radius 2.63 m and...Ch. 11 - A student sits at rest on a piano stool that can...Ch. 11 - Predict/Calculate A turntable with a moment of...Ch. 11 - A student on a piano stool rotates freely with an...Ch. 11 - Walking on a Merry-Go-Round A child of mass m...Ch. 11 - Predict/Explain Two spheres of equal mass and...Ch. 11 - Turning a doorknob through 0.25 of a revolution...Ch. 11 - A person exerts a tangential force of 36.1 N on...Ch. 11 - To prepare homemade ice cream a crank must be...Ch. 11 - Power of a Dental Drill A popular make of dental...Ch. 11 - For a home repair job you must turn the handle of...Ch. 11 - The L-shaped object in Figure 11-40 consists of...Ch. 11 - The rectangular object in Figure 11-41 consists of...Ch. 11 - Predict/Calculate A circular saw blade accelerates...Ch. 11 - CE A uniform disk stands upright on its edge, and...Ch. 11 - CE Consider the two rotating systems shown in...Ch. 11 - CE Predict/Explain A disk and a hoop (bicycle...Ch. 11 - CE A beetle sits at the nm of a turntable that is...Ch. 11 - After getting a drink of water a hamster jumps...Ch. 11 - A 47.0-kg uniform rod 4.25 m long is attached to a...Ch. 11 - Prob. 75GPCh. 11 - BIO The Masseter Muscle The masseter muscle, the...Ch. 11 - Exercising the Biceps You are designing exercise...Ch. 11 - Prob. 78GPCh. 11 - In Example 11-11, suppose the ladder is uniform,...Ch. 11 - When you arrive at Dukes Dude Ranch you are...Ch. 11 - Prob. 81GPCh. 11 - Flats Versus Heels A woman might wear a pair of...Ch. 11 - BIO A young girl sits at the edge of a dock by the...Ch. 11 - BIO Deltoid Muscle A crossing guard holds a STOP...Ch. 11 - BIO Triceps To determine the force a persons...Ch. 11 - Predict/Calculate Suppose partial melting of the...Ch. 11 - A bicycle wheel of radius R and mass M is at rest...Ch. 11 - A 0.101-kg yo-yo has an outer radius R that is...Ch. 11 - BIO Peak Pedaling Torque The downward force...Ch. 11 - A cylinder of mass m and radius r has a string...Ch. 11 - Bricks in Equilibrium Consider a system of four...Ch. 11 - BIO Correcting Torsiversion Torsiversion is a...Ch. 11 - BIO Correcting Torsiversion Torsiversion is a...Ch. 11 - BIO Correcting Torsiversion Torsiversion is a...Ch. 11 - BIO Correcting Torsiversion Torsiversion is a...Ch. 11 - Referring to Example 11-14 Suppose the mass of the...Ch. 11 - Prob. 97PPCh. 11 - Referring to Quick Example 11-22 Suppose the child...Ch. 11 - Referring to Quick Example 11-22 Suppose...
Additional Science Textbook Solutions
Find more solutions based on key concepts
26. Spark jumps to nose An electric spark jumps from a person's finger to your nose. While passing through the ...
College Physics
Using the definitions in Eqs. 1.1 and 1.4, and appropriate diagrams, show that the dot product and cross produc...
Introduction to Electrodynamics
Wave interference occurs with a. transverse wave b. longitudinal wave c. both transverse and longitudinal wave ...
Conceptual Integrated Science
Whats the ammeter reading in Fig. 25.31? FIGURE 25.31 Problem 48
Essential University Physics: Volume 2 (3rd Edition)
1. A railroad car loaded with rocks coasts on a level track without friction. A worker at the back of the car s...
Physics: Principles with Applications
Where in Fig. 20.5 could you put a third charge so it would experience no net force? Would it be in stable or u...
Essential University Physics (3rd 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
- Please help me answering these questions thank you 1.WHAT ARE THE CONDITIONS FOR ROTATIONAL EQUILIBRIUM? 2.GIVE ONE PRACTICAL APPLICATION OF HOOKE’S LAW.arrow_forwardUsing the attached diagram, answer all the questions 1. Using the concept of torque, explain why a second student (student B) needs to apply an additional tension (T2) to put the meterstick in equilibrium. 2. What is the value of T2 in terms of mg? 3. What happens to T1 as student B approaches the center of the meterstick?arrow_forwardA 60.0 cm uniform rod of weight 100 N is supported by a fulcrum as shown in Figure 2. Block P of 20.0 kg is placed 20.0 cm from the left end of the rod. Determine: 1) the additional weight to be placed at 37.0 cm to the right of the fulcrum to balance the rod, and 2) the normal force, n exerted by the fulcrum #Homework given by the lecturer, please help thank youarrow_forward
- Two forces act on the wheel shown. What third force, acting at point P, will make the net torque on the wheel zero?arrow_forwardPlease show your work. Thank you! 01. A crane has an arm length of 20 m inclined at 30deg with the vertical. It carries a container of mass of 2 ton suspended from the top end of the arm. Find the torque produced by the gravitational force on the container about the point where the arm is fixed to the crane. Given: 1 ton = 1000 kg; neglect the weight of the arm. Hint: take the force and perpendicular distance from the point where the arm is fixed to the crane. Note: Express your answer in whole number. No unit is required for the final answer.arrow_forwardPlease show your work. Thank you! 61. A woman whose weight is 778 N is poised at the right end of a diving board with a length of 4.51 m. The board has negligible weight and is bolted down at the left end while being supported 3.87 m away by a fulcrum. Find force that the fulcrum exerts in the board. Note: Express your answer in whole numbers. No unit is required for the final answer.arrow_forward
- Two wheels weighing “W” kN and 46 kN, respectively are connected by a rod of negligible weight and are free to roll on the smooth planes as shown. 1. What is the force of the horizontal rod in kN when the system is in equilibrium? 2. Determine the magnitude of W in kN so that the rod will be horizontal when the system is in equilibrium.arrow_forward1)If the head has a weight of 50.4 N, calculate the force in units of newtons exerted by these muscles using the information in the figure. 2)What is the force in newtons exerted by the pivot on the head?arrow_forward4. The slender, homogeneous rod shown in the figure below is 3 m in length and has a mass of 12 kg. At the instant shown, the rod has an angle to the horizontal of 60-degrees and an angular velocity of 2 rad/s clockwise. Both walls are smooth and provide negligible friction. At the instant shown, what are the reaction forces at A and B? What is the angular acceleration of the rod's center of mass?arrow_forward
- A horizontal 4.0 m long 5.0 N uniform bar at one end is attached to a wall by a frictionless hinge; and at the middle of the bar there is a vertical cable pulling down 7.0 N, and at the middle of the bar there is also a cable that is at 45 ° to the horizontal pulling up as shown. ii) What is the magnitude of the horizontal component of the force on the bar due to the hinge?arrow_forwardExplain your answer 1)The abrasive wheel of a grinder will have lesser rotational inertia if most of its mass is a) located near the rim c) uniformly distributed throughout the disk b) located near the axis of rotation d) none of these 2) When there is no net external torque acting on the system, a) the angular momentum will depend on the time b) the sum of internal torques will increase c) the angular momentum is conserved d) the sum of the internal torques will decreasearrow_forwardPlease answer it within 30 minutes.I will upvote! Problem: If a rotating gyroscope has a moment of inertia of 37.5kgm2, determine the magnitude of the reaction torque required to give it an angular acceleration of 5.0 rad/s2. Show full workings outarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
What is Torque? | Physics | Extraclass.com; Author: Extraclass Official;https://www.youtube.com/watch?v=zXxrAJld9mo;License: Standard YouTube License, CC-BY