College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 9, Problem 4PE
Use the second condition for equilibrium (net
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A uniform ladder of mass 20 kg and length 13 m is resting, with its base on rough horizontal ground at a distance of 5 m from a rough vertical wall. The upper end of the ladder rests against the wall. The ground and the wall have the same coefficient of friction with the ladder.
a. Show that if the ladder is stable, then the coefficient of friction satisfies the inequality
μ> 0.2 [Sufficient working must be shown if full marks are to be awarded here.]
b. If, in fact,
μ= 0.36
Determine the equivalent force-couple system at the center O for each of the three cases of forces (F = 370 N) being applied along the edges of a square plate of side d = 480 mm. The couple is positive if
counterclockwise, negative if clockwise.
y
F
y
y
F
d
- x
F
Answers:
(a)
R =
j) N, Mo =
N-m
(b)
R =
j) N, Mo =
N-m
(c)
R =
j ) N, Mo =
N-m
+
Problems 7.42 and 7.43
The driveway gate is hinged at its right end and can swing freely in the horizontal plane
The gate is pushed open by the force P that always acts perpendicular to the plane of the
gate at point A. which is a horizontal distance d from the gate hinge. The weight of the
gate is W = 215 lb, and its mass center is at G, which is a distance w/2 from each end
of the gate, where w = 16 ft. Assume that the gate is initially at rest, and model the gate
as a uniform thin bar as shown below the photo.
hinge line
/2
Problem 7.42i Given that a force of P
gate (i.e., d = w/2), determine the reactions at the hinge O after the force P has heen
continuously applied for 2 s.
20 lb is applied at the center of mass of the
Problem 7.43 Given that a
Chapter 9 Solutions
College Physics
Ch. 9 - What can you say about the velocity of a moving...Ch. 9 - Under what conditions can a rotating body be in...Ch. 9 - What three factors affect the torque created by a...Ch. 9 - A wrecking ball is being used to knock down a...Ch. 9 - Mechanics put a length of Pipe over the handle of...Ch. 9 - Prob. 6CQCh. 9 - Explain the need for tall towers on a suspension...Ch. 9 - When visiting some countries, you may see a person...Ch. 9 - Prob. 9CQCh. 9 - Prob. 10CQ
Ch. 9 - Why are the forces exerted on the outside world by...Ch. 9 - Explain why the forces in our joints are several...Ch. 9 - Why are the forces exerted on the outside world by...Ch. 9 - Explain why the forces in our joints are several...Ch. 9 - Certain of dinosaurs were bipedal (walked on two...Ch. 9 - Swimmers and athletes during competition need to...Ch. 9 - If the maximum force the biceps muscle can exert...Ch. 9 - Suppose the biceps muscle was attached through...Ch. 9 - Explain one of the reasons why pregnant women...Ch. 9 - (a) When opening a door, you push on it...Ch. 9 - When tightening a bolt, you push perpendicularly...Ch. 9 - Two children push on opposite sides of a door...Ch. 9 - Use the second condition for equilibrium (net =0 )...Ch. 9 - Repeat the seesaw problem in Example 9.1 with the...Ch. 9 - Prob. 6PECh. 9 - Two children of mass 20.0 kg and 30.0 kg sit...Ch. 9 - Prob. 8PECh. 9 - A person carries a plank of wood 2.00 m long with...Ch. 9 - Prob. 10PECh. 9 - Prob. 11PECh. 9 - Prob. 12PECh. 9 - Prob. 13PECh. 9 - Prob. 14PECh. 9 - Prob. 15PECh. 9 - Prob. 16PECh. 9 - To get up on the roof, a person (mass 70.0 kg)...Ch. 9 - Prob. 18PECh. 9 - Prob. 19PECh. 9 - Suppose you needed to raise a 250-kg mower a...Ch. 9 - Prob. 21PECh. 9 - Prob. 22PECh. 9 - Prob. 23PECh. 9 - Prob. 24PECh. 9 - Prob. 25PECh. 9 - Prob. 26PECh. 9 - Prob. 27PECh. 9 - Prob. 28PECh. 9 - Prob. 29PECh. 9 - Prob. 30PECh. 9 - Prob. 31PECh. 9 - Prob. 32PECh. 9 - Prob. 33PECh. 9 - Prob. 34PECh. 9 - Prob. 35PECh. 9 - Integrated Concepts Suppose we replace the 4.0-kg...Ch. 9 - Prob. 37PECh. 9 - You have just planted a sturdy 2-m-tall palm tree...Ch. 9 - Unreasonable Results Suppose two children are...Ch. 9 - Construct Your Own Problem Consider a method for...Ch. 9 - Prob. 1TPCh. 9 - Prob. 2TPCh. 9 - Prob. 3TPCh. 9 - Prob. 4TPCh. 9 - Prob. 5TPCh. 9 - Prob. 6TPCh. 9 - Prob. 7TPCh. 9 - Prob. 8TPCh. 9 - Prob. 9TPCh. 9 - Prob. 10TPCh. 9 - Prob. 11TP
Additional Science Textbook Solutions
Find more solutions based on key concepts
26. A 10 kg crate is placed on a horizontal conveyor belt. The materials are such that and .
a. Draw a free-...
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Which of the following factors would tend to increase membrane fluidity? A. a greater proportion of unsaturated...
Campbell Biology in Focus (2nd Edition)
1. a. Can a vector have nonzero magnitude if a component is zero? If no, why not? If yes, give an example.
b. C...
College Physics: A Strategic Approach (3rd Edition)
1. Why is the quantum-mechanical model of the atom important for understanding chemistry?
Chemistry: Structure and Properties (2nd Edition)
Carefully examine the common sedimentary rocks shown In Figure 2.13. Use these photos and the preceding discuss...
Applications and Investigations in Earth Science (9th Edition)
If someone at the other end of a room smokes a cigarette, you may breathe in some smoke. The movement of smoke ...
Campbell Essential Biology with Physiology (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
- A uniform rod AB of length 2R rests inside a hemispherical bowl of radius R as shown. Neglecting friction, determine the angle θ corresponding to equilibrium.arrow_forwardA uniform rod of mass M and length L and stands in equilibrium against wall and floor as shown in the figure. The friction coefficient between wall and rod is zero and rod and floor is u/2. Find the tangent of the maximum angle 0 so that the rod does not slip?arrow_forwardPlease asaparrow_forward
- Question 2. The uniform 20-kg ladder in Figure rests against the smooth wall at B, and the end A rests on the rough horizontal plane for which the coefficient of static friction is u, = 0.25. Determine the angle of inclination 0 of the ladder and the normal reaction at B if the ladder is on the verge of slipping !! 4 m Answer 2.arrow_forwardQuestion in pic.arrow_forwardA disk of mass m= 5kg and radius r= 0.5m rolls to the right under the influence of force P= 40N. What is the minimum static coefficient of friction for the disk not to slip? ω, α r P X Answer(s):arrow_forward
- A uniform solid disk of mass M and radius R hangs from a string of length ℓ attached to a smooth vertical wall (see the figure attached). Calculate the tension in the string and the normal force acting at the point of contact of disk and wall.arrow_forward(a) Is it possible for an object to be in translation equilibrium ( the first condition) but not in rational equilibrium ( the second condition) ? Illustrate your answer with a simple example. (b) Can an object be in rational equilibrium yet not in translation equilibrium? justify your answer with a simple example.arrow_forwardGiven that the force in the two springs at alpha = 45 and 90 are, respectively, 20.91 and 56.10 lbs.arrow_forward
- The refrigerator from the 11.11 Lazada sale finally arrived at George’s house. George now tries to reposition the 55 kg refrigerator in his kitchen by pushing it with a force P=100N inclined 30° from the horizontal at 1.60 m from the floor. The coefficient of non-sliding (static) friction between the floor and the refrigerator is 0.40. give the correct moment equilibrium equation for the refrigerator. Assuming equilibrium, where is the location of the point of application of the normal force along the bottom surface of the body?arrow_forwardReplace the loading system acting on the post by an equivalent resultant force and couple moment at point B. Suppose that F1 = 750 N and F2 = 650 N. Determine the magnitude of the resultant force. Determine the angle between the resultant force and the x axis.arrow_forwardThe upper end of a wide-skid W 8 × 21 steel column (E = 30 × 103 ksi) is supported laterally between two tubes (see figure). The tubes are not attached to the column and the friction between the tubes and the column is not reliable. The base of the column provides fixed support and the column is 13 ft long. Determine the critical load for the column, consider the Euler buckling in the web plane and also perpendicular to the web plane.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
University Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSON
Introduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Lecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON
28.1 Rigid Bodies; Author: MIT OpenCourseWare;https://www.youtube.com/watch?v=u_LAfG5uIpY;License: Standard YouTube License, CC-BY