Two 8 wedges of negligible weight are used to move and position the 800-kg block. Knowing that
Question:
Two 8° wedges of negligible weight are used to move and position the 800-kg block. Knowing that the coefficient of static friction is 0.30 at all surfaces of contact, determine the smallest force P that should be applied as shown to one of the wedges.
800 kg 8°
Step by Step Answer:
s 030 s tan 1 030 1670 Free body 800kg block and righthand wedge W ...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
-
Two 8° wedges of negligible weight are used to move and position a 530-lb block. Knowing that the coefficient of static friction is 0.40 at all surfaces of contact, determine the magnitude of the...
-
A gate assembly consisting of a 24-kg gate ABC and a 66-kg counterweight D is attached to a 24-mm-diameter shaft B which fits loosely in a fixed bearing. Knowing that the coefficient of static...
-
Knowing that the coefficient of static friction is 0.30 between the rope and the horizontal pipe and that the smallest value of P for which equilibrium is maintained is 20 lb, determine (a) The...
-
What would likely happen to long-run average cost at Oman's facility if engineers encountered difficulties in maintaining the facility's substantial daily volume of oil production? Explain.
-
Haidet Corp. has a return on assets ratio of 12%. It plans to issue bonds at 8% and use the cash to repurchase stock. What effect will this have on its debt to total assets ratio and on its return on...
-
Assume a normal distribution with known population variance. Calculate the width to estimate the population mean, m, for the following. a. 90% confidence level; n = 100; 2 = 169 b. 95% confidence...
-
Use technology and the data in StudentSurvey to construct a graph of the relationship between class Year and Gender for the situation in Exercise 2.37. Data From Exercise 2.37: Class Year by Gender...
-
Several years ago, Brian formed Sigma Corporation, a retail company ineligible for the U.S. production activities deduction. Sigma uses the accrual method of accounting. In 2015, the corporation...
-
It is difficult to sue an auditor as a third party. Required Outline three key reasons why the third party might not succeed in litigation with the auditors.
-
Finney Displays designs and manufactures displays used in mobile devices. Serious flooding throughout the region affected Finney Displays' facilities. Inventory was completely ruined, and the...
-
Determine the smallest value of P required to (a) Start the block up the incline, (b) Keep it moving up. 50 lb 0.40 0.30 40 30
-
Two 8 wedges of negligible weight are used to move and position the 800-kg block. Knowing that the coefficient of static friction is 0.30 at all surfaces of contact, determine the smallest force P...
-
Determine whether the statement is true or false. If it is true, explain why. If it is false, explain why or give an example that disproves the statement. If F = P i + Q j and Py = Qx in an open...
-
Calculate the mean, variance, and skewness coefficient for the data given in Table 4.9. Is the distribution symmetric ? Table 4.9 Year 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 Sum...
-
The United States brought a lawsuit requesting forfeiture of a \($38.5\) million jet purchased by Teodoro Nguema Obiang Mangue (Nguema) because the government believed the jet had been purchased with...
-
In 1990 Congress passed the Gun-Free School Zone Act that made it unlawful to possess a firearm in a school zone. A highschool senior carried a concealed and loaded handgun into his high school and...
-
What are the primary advantages of resolving a case through alternative dispute resolution methods rather than going to trial? In what situations might a trial be preferable?
-
Update the head coaching situation in the NFL. How has the number of head coaches of color changed since this books printing? Has the NFLs Rooney Rule been changed? Discuss why you believe the...
-
Define: Common Law Code Law Islamic Law Marxist-Socialist tenets Prior use vs. registration Conciliation Arbitration Litigation Cybersquatters Prior use Registration
-
In Exercises discuss the continuity of each function. f(x) -3 1 x - 4 y 3 2 -1 -2 -3+ 3 X
-
In the two-cylinder air compressor shown the connecting rods BD and BE are each 7.5 in. long and crank AB rotates about the fixed point A with a constant angular velocity of 1500 rpm clockwise....
-
Knowing that at the instant shown bar AB has a constant angular velocity of 5 rad/s counterclockwise, determine (a) The angular acceleration of bar BD, (b) The angular acceleration of bar DE. 180 mm...
-
Knowing that at the instant shown bar AB has a constant angular velocity of 4 rad/s clockwise, determine the angular acceleration (a) Of bar BD, (b) Of bar DE. 200 mm B 160 60 mm D 120mm
-
You have just made your first $5,200 contribution to your retirement account. Assume you earn a return of 12 percent per year and make no additional contributions. a. What will your account be worth...
-
There are two components of leadership. The first is your own personal style and the second is how you choose to lead. Use the following checklist to evaluate your leadership style: What Kind of a...
-
Selected Realized Returns, 1926-2017 Average Return Standard Deviation Small-cap stocks 16.5% 31.7% Large-cap stocks 12.1 19.8 Long-term corporate bonds 6.4 8.3 Long-term government bonds 6.0 9.9...
Study smarter with the SolutionInn App