In Problem 8.60, determine the angle that the face of the bolt should form with the line
Question:
PROBLEM 8.60
The spring of the door latch has a constant of 1.8 lb/in. and in the position shown exerts a 0.6-lb force on the bolt. The coefficient of static friction between the bolt and the strike plate is 0.40; all other surfaces are well lubricated and may be assumed frictionless. Determine the magnitude of the force P required to start closing the door.
in. 45° s In
Step by Step Answer:
For position shown in figure From Prob 860 P 1400 lb For position whe...View the full answer
Vector Mechanics for Engineers Statics and Dynamics
ISBN: 978-0073398242
11th edition
Authors: Ferdinand Beer, E. Russell Johnston Jr., David Mazurek, Phillip Cornwell, Brian Self
Related Video
Static friction and kinetic friction are two types of friction that occur when two objects are in contact with each other. Static friction is the force that must be overcome to initiate motion between two surfaces that are in contact with each other but are not moving relative to each other. It is caused by the interlocking of rough surfaces at the microscopic level, and it increases as the force pushing the surfaces together increases. Once motion between the surfaces starts, the static friction is no longer present. Kinetic friction, also known as sliding friction, is the force that opposes the motion of two surfaces that are in contact with each other and are moving relative to each other. It is caused by the rubbing of the surfaces against each other and the resistance of the molecules in the surfaces to being moved. Kinetic friction is generally less than static friction, but it can still be a significant force, especially at high speeds. Both static and kinetic friction can be quantified using a coefficient of friction, which is a dimensionless number that represents the ratio of the frictional force between two surfaces to the normal force (the force perpendicular to the surfaces). The coefficient of static friction is typically greater than the coefficient of kinetic friction for a given pair of surfaces, because it takes more force to overcome the interlocking of the surfaces at rest than to maintain motion once it has started.
Students also viewed these Mechanics questions
-
For the conic helix of Prob. 11.97, determine the angle that the oscillating plane forms with the y axis.
-
The average intensity of light emerging from a polarizing sheet is 0.764 W/m2, and the average intensity of the horizontally polarized light incident on the sheet is 0.883 W/m2. Determine the angle...
-
Suppose that the two masses in Problem 80 are not equal. One mass is 0.01 kg, the other is 0.02 kg. The charges on the two masses are 2.0?C and 1.0?C, respectively. Determine the angle that each of...
-
The annual membership fee at your health club is $750 a year and is expected to increase at 5% per year. A life membership is $7,500 and the discount rate is 12%. You either pay the annual membership...
-
Indicate how each of these accounts should be classified in the stockholders equity section of the balance sheet. (a) Common Stock. (b) Paid-in Capital in Excess of Par Value. (c) Retained Earnings....
-
Consider the data in Exercise 7.90. Suppose that we computed for the population proportion who pay for vehicle registration by mail a confidence interval extending from 0.34 to 0.46. What is the...
-
Sports-Related Concussions in Kids Researchers examined all sports-related concussions reported to an emergency room for children ages 5 to 18 in the United States over the course of one year. Table...
-
A bank has written European a call option on one stock and a European put option on another stock. For the first option, the stock price is 50, the strike price is 51, the volatility is 28% per...
-
China and India are the two most populous countries in the world, but they have taken very different approaches to population control. Students will gather population statistics for these two...
-
Brace Parts manufactures components for the audio-video equipment industry. At a recent corporate retreat, the management of Brace reviewed the company strategy and decided that Brace had a strategic...
-
The spring of the door latch has a constant of 1.8 lb/in. and in the position shown exerts a 0.6-lb force on the bolt. The coefficient of static friction between the bolt and the strike plate is...
-
A 5° wedge is to be forced under a 1400-lb machine base at A. Knowing that the coefficient of static friction at all surfaces is 0.20, (a) Determine the force P required to move the wedge, (b)...
-
How can a manager effectively balance the key components of a Six Sigma implementation design related to who, what, where, when, why, and how it could be done?
-
Thomas Brookie went shopping in the Winn Dixie Supermarket. He purchased his items and brought them to the car without incident. He then made additional trips in and out of the store to get empty...
-
The plaintiff, Dennis Rubel, was permanently injured while working at Lowes Home Center Inc., and hired Michael Dzienny to represent him in a personal injury lawsuit. When discussing a settlement...
-
Alco, Inc., has a progressive board of directors and CEO who are committed to creating and maintaining an ethical culture within its business environment. It has an extensive corporate compliance and...
-
A retail company must file a monthly sales tax report listing the total sales for the month, and the amount of state and county sales tax collected. The state sales tax rate is 4 percent and the...
-
LiveJournal was a popular social media platform which enabled online communities to post comments and content related to particular themes. Its most popular community was called Oh No They Didnt!...
-
Assume you are deciding to go international and outline the steps you would take to help you decide on a product line.
-
Find an equation of the given line. Slope is -2; x-intercept is -2
-
Pin P is attached to the wheel shown and slides in a slot cut in bar BD. The wheel rolls to the right without slipping with a constant angular velocity of 20 rad/s. Knowing that x = 24 in. when = 0,...
-
Knowing that at the instant shown the angular velocity of bar AB is 15rad/s clockwise and the angular velocity of bar EF is 10rad/s clockwise, determine (a) The angular velocity of rod DE, (b) The...
-
Knowing that at the instant shown the angular velocity of rod DE is 10 rad/s clockwise and the angular velocity of bar EF is 15 rad/s counterclockwise, determine (a) The angular velocity of bar AB,...
-
How do prokaryotes engage in sophisticated social behaviors, such as altruism and kin selection, and what genetic and ecological factors influence the evolution of these traits?
-
N Suppose for the integral T|[a,b] () = f f(x)dx, we approximate it with the midpoint method, which for mesh {x;} where xj = a + , = b-a N j=0 is given by N-1 1 A[a,b] (f) = 5x f (xj+1/2), where...
-
What are the structural and functional complexities of prokaryotic cell membranes, and how do they contribute to processes such as nutrient uptake, osmoregulation, and signal transduction?
Study smarter with the SolutionInn App